EDITEK INC
S-3/A, 1996-04-25
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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     As filed with the Securities and Exchange Commission on April 25, 1996

                                              Registration No. 333-827
    

                    SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549
   
                               AMENDMENT #2
    
      FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                            -----------------
                               EDITEK, INC.
          (Exact name of registrant as specified in its charter)

Delaware                           8071                          95-3863205
(State of               (Primary Standard Industrial         (I.R.S Employer
incorporation)          Classification Code Number)          Identification No.)

                              1238 Anthony Road
                        Burlington, North Carolina 27215
                               (910) 226-6311
              (Address,  including zip code, and telephone  number,
               including  area code,  of  registrant's  principal
                              executive offices)

        Peter J. Heath
Vice President of Finance and                             Copies to:
     Chief Financial Officer                             James Verdonik
           EDITEK, INC.                              Petree Stockton, L.L.P.
       1238 Anthony Road                              4101 Lake Boone Trail
Burlington, North Carolina  27215                       Raleigh, NC  27607
         (910) 226-6311                                   (919) 420-1700
(Name, address, including zip code,
and telephone number, including area
code, of agent for service)

         Approximate date of commencement of proposed sale to public:  From time
to time after this Registration Statement becomes effective.

         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933, check the following box. [ X ]


<PAGE>


                     CALCULATION OF REGISTRATION FEE
   
                                 Proposed          Proposed
Title of each                    maximum           maximum
class of          Amount         offering          aggregate      Amount of
securities to     to be          price per         offering       registration
be registered     registered     share             price          fee 
- -------------     ----------     ------------      ----------     -------

Common Stock,
par value $.15
per share         11,478,193       $3.50 (1)     $40,173,675 (1) $13,851.88 (2)

Common Stock,
par value $.15
per share            320,000       $1.00 (3)     $  320,000 (3)  $  110.40

    


          (1) Estimated  solely for purposes of calculating the registration fee
based upon the closing price reported on the American Stock Exchange on February
6, 1996.

         (2) Previously paid.

   

         (3) Estimate solely for purposes of calculating the registration fee 
based upon the closing price reported on the American Stock Exchange on April
19, 1996.

    
         The Registrant hereby amends the Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a  further  amendment  which  specifically  states  that  the  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the  Securities  Act of 1933 or until the  Registration  Statement  shall become
effective on such date as the  Commission,  acting pursuant to said Section 8(a)
of the Securities Act of 1933, may determine.


<PAGE>


                                  EDITEK, INC.
                              CROSS-REFERENCE SHEET
                    Pursuant to Item 501(b) of Regulation S-K

         Item Number and Caption                      Heading in Prospectus

1.       Forepart of the Registration
           Statement and Outside Front
           Cover Page of Prospectus                   Front Page of Registration
                                                        Statement; Front Cover
                                                        Page of Prospectus

2.       Inside Front and Outside Back
           Cover Pages of Prospectus                  Second Page of Prospectus;
                                                      Back Cover Page of
                                                      Prospectus

3.       Summary Information, Risk
           Factors and Ratio of Earnings
           to Fixed Charges                           Risk Factors

4.       Use of Proceeds                              N/A

5.       Determination of Offering
           Price                                      Front Cover Page of
                                                        Prospectus

6.       Dilution                                     N/A

7.       Selling Shareholders                         Selling Shareholders

8.       Plan of Distribution                         Front Cover Page of
                                                        Prospectus;
                                                      Plan of Distribution

9.       Description of Securities
           to be Registered                           Outstanding Shares

10.      Interests of Named Experts
           and Counsel                                Legal Matters; Experts

11.      Material Changes                             Recent Developments

12.      Incorporation of Certain
           Information by Reference                   Incorporation of Certain
                                                       Information by Reference

13.      Disclosure of Commission
           Position on Indemnification
           for Securities Act
           Liabilities                                N/A


<PAGE>


   
                          PROSPECTUS DATED APRIL 25, 1996
                              SUBJECT TO COMPLETION
                        11,798,193 SHARES OF COMMON STOCK
    
         This  Prospectus   shall  not  constitute  an  offer  to  sell  or  the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.

                                  EDITEK, INC.
   
         This Prospectus  relates to an aggregate total of 11,798,193  shares of
Common Stock, par value $.15 per share (the "Common Stock") of EDITEK, Inc. (the
"Company" or "EDITEK"),  which number of shares  includes (i)  2,517,306  shares
issued to MLI  Dissolution,  Inc.,  ("MLI") formerly MEDTOX  Laboratories,  Inc.
pursuant to an Asset Purchase Agreement between the Company and MLI (the "MEDTOX
Agreement"),  (ii) 235,295 shares sold to Dr. Harry McCoy, a MEDTOX shareholder,
in a transaction immediately after the Company's acquisition of MEDTOX, (iii) a
minimum of 1,873,873 shares which are issuable to the holders of 104 shares of 
the Company's Series A Convertible  Preferred Stock (the "Series A Preferred 
Stock") upon conversion of the Series A Preferred  Stock (the  "Conversion  
Shares"), and (iv) up to 6,265,052  shares which may be issued in certain 
circumstances to the MEDTOX shareholders and the holders of the 104 shares of
Series A Preferred Stock held by Selling Shareholders ("Price Protection 
Shares"). This Prospectus also relates to 906,667 shares of Common Stock 
issuable upon the exercise of warrants issued as compensation for the sale 
of securities (the "Investment Banker Warrants"). The MEDTOX  shareholders,  
Dr. Harry McCoy,  the holders of 104 shares of Series A Preferred Stock, and 
the holders of Investment Banker Warrants are hereinafter referred to as 
the "Selling Shareholders." See "Plan of Distribution", "Selling Shareholders" 
and "Number of Shares of Common Stock."  The securities  offered  hereby (the  
"Shares")  are to be offered on account of the Selling Shareholders.
    

THESE  SECURITIES  INVOLVE A HIGH DEGREE OF RISK AND SHOULD BE  CONSIDERED  ONLY
BY  PERSONS  WHO  CAN  AFFORD  THE  LOSS  OF  THEIR ENTIRE INVESTMENT. SEE "RISK
FACTORS".

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION.  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                           Price to                         Proceeds to Company
                           Public         Discounts            or other Persons
Per Share                     (1)               (2)                         (3)
Total Maximum (4)             (1)               (2)                         (3)

   
(1)      The Selling Shareholders may from time to time affect the sale of their
         Shares at prices and at terms then  prevailing or at prices  related to
         the  then-current  market  price.  The Common  Stock of the  Company is
         traded on the American Stock Exchange under the symbol "EDI".  On April
         19,  1996,  the  closing  price of the Common  Stock as reported by the
         American Stock Exchange was $1.00 per share.
    
(2)      The  Selling  Shareholders  may  pay  regular  brokers'  commissions in
         cash at the time(s) of the sale of their Shares.
   
(3)      The Company will not receive any proceeds  from the sales of the Shares
         to which this Prospectus relates. The Selling Shareholders will receive
         proceeds  based on the  market  price of the  Shares at the  time(s) of
         sale.  The Company  will,  however,  receive  $2.83 per share upon the
         exercise of the Investment Banker Warrants.
    
(4)      Without  deduction of expenses  for the offering  (all of which will be
         borne by the Company), estimated to be approximately $28,000.
   
The date of this Prospectus is April 25, 1996
    
                                     1
<PAGE>

                     (Inside front cover page of Prospectus)

                              AVAILABLE INFORMATION

         The  Company  is  subject  to  the  informational  requirements  of the
Securities Exchange Act of 1934 (the "Exchange Act") and in accordance therewith
files reports,  proxy  statements and other  information with the Securities and
Exchange  Commission (the  "Commission").  Reports,  proxy  statements and other
information  filed by the  Company  can be  inspected  and  copied at the public
reference facilities  maintained by the Commission at Judiciary Plaza, 450 Fifth
Street, N.W.,  Washington,  D.C. 20549 and at its Regional Offices located at 75
Park  Place,  New  York,  New York  10007,  and the John C.  Kluczynski  Federal
Building,  230 South Dearborn Street,  Chicago,  Illinois 60604.  Copies of such
material can be obtained from the Public Reference  Section of the Commission at
Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 upon request and
payment of the prescribed fee.

         The  Company's  Common Stock is listed on the American  Stock  Exchange
(the "AMEX"),  and reports,  proxy statements and other information filed by the
Company can be inspected at such exchange.

         The  Company  has filed with the  Commission  in  Washington,  D.C.,  a
Registration  Statement  under  the  Securities  Act of 1933,  as  amended  (the
"Securities  Act"),  with respect to the registration of the securities  offered
hereby.  This  Prospectus  omits  certain of the  information  contained  in the
Registration Statement, of which this Prospectus is a part. Statements contained
herein  concerning the provisions of any documents are not necessarily  complete
and, in each  instance,  reference is made to the copy of such document filed as
an exhibit to the  Registration  Statement.  Each such statement is qualified in
its  entirety  by  such  reference.  Items  of  information  omitted  from  this
Prospectus but contained in the Registration  Statement may be obtained from the
Commission at Judiciary Plaza, 450 Fifth Street, N.W.,  Washington,  D.C. 20549,
upon request and payment of the prescribed fee.

              INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

         The  following  documents,  each of which was  previously  filed by the
Company  with the  Commission  pursuant to Section 13 of the  Exchange  Act, are
incorporated herein by reference:

                  a.       The Company's Proxy Statement dated September 25,
                  1995.

                                       2
<PAGE>

                  b.       The Company's Report on Form 10-K for the fiscal year
                  ended December 31, 1995.

                  c.       The Company's  Report on  Form 8-K dated  January 30,
                  1996.

   
                  d.       The Company's Report on Form 8-K dated March 5, 1996.

                  e.       Description of the Common Stock  contained under  the
                  caption  "Description   of   Registrant's   Securities  to  be
                  Registered"  in  the  Company's   Registration   Statement  on
                  Form 8-A filed  pursuant to Section 12(g) of the Exchange Act.

    

         All documents filed by the Company  pursuant to Sections 13(a),  13(c),
14 and 15(d) of the Exchange Act  subsequent to the date of this  Prospectus and
prior to the  termination  of the  offering  made  hereby  shall be deemed to be
incorporated  by  reference  herein and to be a part hereof from the date of the
filing of such  reports and  documents.  Any  statement  contained in a document
incorporated or deemed to be incorporated by reference herein shall be deemed to
be modified or superseded  for purposes of this  Prospectus to the extent that a
statement  contained  herein or in any other  subsequently  filed document which
also  is  or  is  deemed  to be  incorporated  by  reference  herein  or in  any
accompanying  Prospectus  Supplement modifies or supersedes such statement.  Any
such  statement  so modified  or  superseded  shall not be deemed,  except as so
modified or superseded, to constitute a part of this Prospectus.

         The  Company  will  provide  without  charge  to each  person to whom a
Prospectus is delivered  upon written or oral request of each person,  a copy of
any  documents  incorporated  herein by reference  (other than  exhibits to such
documents unless such exhibits are  specifically  incorporated by reference into
the  documents  that this  Prospectus  incorporates).  Requests  for such copies
should be directed to EDITEK,  Inc.,  Attention:  Secretary,  1238 Anthony Road,
Burlington, North Carolina 27215, (910) 226-6311.

   
              CAUTIONARY STATEMENT IDENTIFYING IMPORTANT
                 FACTORS THAT COULD CAUSE THE COMPANY'S
             ACTUAL RESULTS TO DIFFER FROM THOSE PROJECTED
                    IN FORWARD LOOKING STATEMENTS

        In connection with the "safe harbor" provisions of the Private 
Securities Litigation Reform Act of 1995, readers of this document and any 
document incorporated by reference herein, are advised that this document and
documents incorporated by reference into this document contain both statements
of historical facts and forward looking statements. Forward looking statements
are subject to certain risks and uncertainties, which could cause actual results
to differ materially from those indicated by the forward looking statements.
Examples of forward looking statements include, but are not limited to (i) 
projections of revenues, income or loss, earning or loss per share, capital 
expenditures, dividends, capital structure and other financial items, (ii) 
statements of the plans and objectives of the Company or its management or 
Board of Directors, including the introduction of new products, or estimates
or predictions of actions by customers, suppliers, competitors or regulatory 
authorities, (iii) statements of future economic performance, and (iv) 
statements of assumptions underlying other statements and statements about the 
Company or its business.


        This document and any document incorporated by reference herein also 
identify important factors which could cause actual results to differ 
materially from those indicated by the forward looking statements. These risks
and uncertainties include price competition, the decisions of customers, the
actions of competitors, the effects of government regulation, possible delays 
in the introduction of new products, customer acceptance of products and 
services, the possible effects of the MEDTOX acquisition and its related 
financings and other factors which are described herein and/or in documents 
incorporated by reference herein.


       The cautionary statements made pursuant to the Private Litigation 
Securities Reform Act of 1995 above and elsewhere by the Company should not 
be construed as exhaustive or as any admission regarding the adequacy of 
disclosures made by the Company prior to the effective date of such Act. Forward
looking statements are beyond the ability of the Company to control and in many
cases the Company cannot predict what factors would cause results to differ 
materially from those indicated by the forward looking statements.

    


                                   RISK FACTORS

         An  investment in the Common Stock is  speculative  and involves a high
degree of risk. Investors should carefully consider the following factors, among
others, before investing in the Common Stock.

         1. Dependence on Sales of Equity.  As of December 31, 1995, the Company
had not achieved a positive cash flow from operations.  Accordingly, the Company
relies on  available  credit  arrangements,  outside  funding  of  research  and
development  and continued  sales of its equity  securities  to fund  operations
until a  positive  cash flow can be  achieved.  From  January  1,  1991  through
December  31, 1995,  the Company  raised  approximately  $12 million

                                    3
<PAGE>

from equity financing and issued 6,058,699 shares of the Company's Common  Stock
for  an average price of $1.98 per share, all of which were issued at a discount
to  the  market  value  of  the  Company's Common Stock. In order to finance the
acquisition  of MEDTOX, pay applicable costs and expenses and to provide working
capital,  the  Company  raised  approximately  $20 million  from the sale of the
Preferred  Stock  and  Common  Stock.  This  amount  and the amount borrowed, as
described  below, have allowed the Company to consummate the MEDTOX  acquisition
and the  Company believes  should  provide  enough  working  capital to help the
Company  achieve  positive  cash  flow.  If  the  Company is unable to achieve a
positive  cash flow, additional  financing  will  be  required.  There can be no
assurance that additional financing  can  be obtained or if  obtained,  that the
terms will be favorable to the Company.


         2. Operating Losses;  Uncertainty of Sales Growth and Market Acceptance
of Products.  From its  inception in June 1983  through  December 31, 1995,  the
Company accumulated a deficit from operations of approximately $34 million.  The
Company currently derives  approximately 57% of its revenue from the sale of its
Laboratory  Testing Services and  approximately 15% of its revenue from the sale
of Substance  of Abuse  Testing  Products.  The markets for  Laboratory  Testing
Services and Substance of Abuse Testing Products are extremely competitive.  The
Company's  ability to finance its operations and to achieve  profitability  will
depend,  in large part, upon the Company's  ability to increase the sales volume
of its current  on-site  products  and  laboratory  services and to achieve cost
savings by integrating MEDTOX and the Company's existing laboratory  operations,
as well as the ability to develop, introduce and successfully market new VERDICT
and  EZ-SCREEN  on-site  test kits.  Market  acceptance  of new products and the
ability to increase  sales volume of current  products  and  services  generally
requires substantial time and effort. There can be no assurance that the Company
and its products and services will compete  effectively against other diagnostic
testing  methods  that now exist,  or may be  developed  by others,  or that the
Company will achieve profitability and there can be no assurance of savings from
the integration of laboratory operations.  (See "Risk Factors - Obsolescence and
Technological Change" and "Risk Factors - Government Regulation").



         3.  Debt  Service;  Debt  Seniority;   No  Dividends.  To  finance  the
acquisition  of MEDTOX and to provide  working  capital the Company  borrowed $5
million in January, 1996. The debt financing consists of two term loans totaling
$4 million and up to $7 million in the form of a revolving  line of credit based
on the receivables of the Company (the "Loan  Agreement").  The amount of credit
available to the Company  varies with the accounts  receivable and the inventory
of the Company.  On January 30, 1996, the receivables and inventory amounts made
$2.9 million of the credit facility available.  The two term loans of $2 million
each have  interest  rates of 2.5% above  prime  rate and 2.0% above  prime rate

                                    4
<PAGE

respectively.  The  revolving  line of credit has an interest rate equal to 1.5%
above  prime  rate.  There  can be no  assurance  that  the  Company  will  have
sufficient  revenues  to service  payments  of  principal  and  interest on this
indebtedness. Failure to service this indebtedness would have a material adverse
effect on the  Company.  The  indebtedness  of the Company will be senior to the
Series A  Preferred  Stock and shares of Common  Stock upon  liquidation  of the
Company.   Interest   payments  on  the  indebtedness  may  cause  there  to  be
insufficient  cash to pay any  dividends.  In addition,  the loan amount and the
line of credit agreement  contain  covenants that restrict the Company's ability
to pay  dividends  even if the  Company  has cash  available  from  which to pay
dividends. See "Number of Shares of Common Stock - Debt Financing."


         4.  Unexpected   Effects  of  Merger(s).   The  Company  completed  the
acquisition of the MEDTOX assets on January 30, 1996 (the "Closing  Date").  The
Company also acquired the assets and operations of Bioman Products, Inc. on June
1, 1995. The Company  anticipates that certain  synergism will arise between the
Company and Bioman and MEDTOX. In February 1994, the Company acquired  Princeton
Diagnostic  Laboratories  of America,  Inc.  ("PDLA").  In  connection  with the
acquisition  of MEDTOX,  the Company  determined  that it would be beneficial to
consolidate the laboratory  operations of PDLA into the laboratory operations of
MEDTOX.  There can be no assurance that any synergism will arise from the recent
acquisitions and the associated laboratory  consolidation.  The efforts required
to  integrate  the  business of the  Company  with other  operations  may have a
material  adverse effect on the operations of either the Company or the acquired
company(s).

         5. Adverse Effect on Market Price of Future Sales of the Company Stock.
A  substantial  number  of shares of stock of the  Company  have been  issued in
transactions that are exempt from registration under the Securities Act of 1933,
as amended,  either in private placements or pursuant to Regulation S, see "Risk
Factors - Dependence on Sales of Equity."
   
         In addition to the shares of Common Stock  covered by this  Prospectus,
on January 30, 1996 and February 2, 1996,  the Company sold 303 shares of Series
A Preferred  Stock  utilizing  the  exemption  afforded by  Regulation  S of the
Commission  (the  "Offshore  Offering"),  which  shares are  convertible  into a
minimum of  5,459,459  shares of Common Stock and may be  convertible  into more
shares of Common Stock if the market price of the Common Stock of the Company is
less than $3.70 per share on the  conversion  dates.  As of April 19, 1996,  the
market  price of the  Common  Stock was  $1.00 per share at which  price the 303
shares of Series A Preferred Stock would be convertible into 20,200,000 shares 
of Common Stock, based on a conversion price of $.75 per share or a 25% discount
to the market price on April 19, 1996.
    
                                    5
<PAGE>

         Regulation S provides generally that offers or sales that occur outside
the United  States  and in  compliance  with the  requirements  thereof  are not
subject  to  the  registration  requirements  of the  Act.  Subject  to  certain
restrictions  and conditions  set forth  therein,  Regulation S is available for
offers and sales to investors that are not U.S. persons. Such offshore investors
who  purchase the shares of Series A Preferred  Stock in the  Offshore  Offering
pursuant to Regulation S are not permitted to transfer such shares or Conversion
Shares to a U.S.  Person  (defined  generally  as a resident  of the U.S.  or an
entity  organized  under  the laws of the U.S.) for a period of at least 40 days
after  February 2, 1996, the closing of the Offshore  Offering (the  "Restricted
Period"). Resales to buyers who are not U.S. persons are permitted at any time.


   
         After the expiration of the Restricted Period,  investors who purchased
shares of Series A Preferred Stock in the Offshore Offering may sell such shares
or Conversion  Shares in the U.S.,  but only if such shares are registered or an
exemption from  registration is available.  Accordingly,  beginning on March 30,
1996 (the  first day any  investor  was able to  convert  shares of Series A
Preferred  Stock into shares of Common  Stock),  to the extent that any offshore
investors  have converted  their shares of Series A Preferred  Stock into Common
Stock, such offshore investors are able to sell such Common Stock in the U.S. 
if the shares are registered or an exemption is available. As of April 19, 1996,
the Company had received conversion notices for 57 shares of Series A Preferred,
which resulted in the issuance of 2,398,730 shares of Common stock.

    

   
           Sales of Conversion Shares for such offshore  investors must be made
in compliance with an exemption from  registration.  The agreements between the
Company and offshore investors provide that the stock  certificates will not
contain restrictive  securities legends.  Consequently,  if the Company complies
with  these agreements,  the Company would not be able to prevent illegal
resales of  Series A Preferred Stock or Conversion Shares by offshore  investors
and each offshore investor will make its own determination whether such sales
qualify for exemptions from registration. On March 27, 1996 the Company 
determined it would place legends on Common Stock certificates to assure 
that all resales of securities are made in compliance with applicable
securities laws. Since that date, the Company has been in discussion with 
Preferred shareholders about whether the Common Stock should be legended. 
In part to avoid protracted litigation from Preferred shareholders and in 
part in reliance on the cooperation of Preferred shareholders who have 
reaffirmed their intention to comply with securities laws on all resales, 
the Company has begun to issue Common Stock certificates without legends. 
The Company will seek to work with its Preferred shareholders to assure 
compliance with securities laws on resales. The Company intends to monitor 
trading in its stock closely, but notwithstanding that the Preferred 
shareholders sell only pursuant to an available exemption, there can be 
no assurance that the trading activities on their transferees will not result 
in decreases in the market price of the Company's Common Stock. The Company 
is continuing to discuss issues related to conversion with its Preferred 
shareholders and may offer registration rights and/or other rights to 
Preferred shareholders as an inducement to delay conversion. 
There can be no assurance the issues related to resale of the Common 
Stock of the Company issued pursuant to Regulation S will not have a material 
adverse affect on the Company, including the ability of the Company to raise 
additional capital in the future.
    


      If substantial sales of the Company's  Common Stock occur,  whether by
the investors in the Offshore  Offering or by U.S.  investors  pursuant to this

                                     6
<PAGE>

Prospectus or otherwise,  such sales could have a material adverse effect on the
market price of the Company's Common Stock.
   
         6. Adverse Effect of Price Protection Provisions.  The number of shares
of Common Stock issuable upon  conversion of a share of Series A Preferred Stock
will equal the number derived by dividing (i) the purchase price of the Series A
Preferred  Stock  ($50,000 per share) by (ii) the lower of (x) $2.775 or (y) 75%
of the  Market  Price of the  Common  Stock on the day the  shares  of  Series A
Preferred  Stock are converted into Common Stock.  "Market Price" is defined for
this  purpose as the daily  average  of the  closing  bid  prices  quoted on the
American  Stock  Exchange or other  exchange on which the Common Stock is traded
for the  five  trading  days  immediately  preceding  the date  the  shares  are
converted.  Accordingly,  a minimum  of  7,333,333  shares  of Common  Stock are
issuable upon  conversion of the 407 shares of Series A Preferred  Stock sold in
both the U.S.  Offering  and the  Offshore  Offering,  but the actual  number of
shares of Common Stock issuable upon  conversion of the Series A Preferred Stock
will not be known until the time of issuance of the shares of Common  Stock upon
conversion. As of April 19, 1996, the market price of the Common Stock was $1.00
per share at which  price the 407 shares of Series A  Preferred  Stock  would be
convertible into 27,133,333 shares of Common Stock,  based on a conversion price
of $.75 per share or a 25% discount to the market price on April 19, 1996.

         The MEDTOX Asset Purchase Agreement provides that, if after the Closing
Date the market value of the Common Stock of the Company  declines  below $1.986
per share during four  specified  periods (the  "Repricing  Periods")  following
press  releases by the  Company,  the Company  will issue  additional  shares of
Common Stock  ("Additional  Shares") to  shareholders of MEDTOX who retain their
shares of Common Stock through four specified dates (the  "Repricing  Dates") to
compensate the MEDTOX shareholders for decreases after the closing of the MEDTOX
acquisition  in the market price of the Common Stock of the Company below $1.986
per share.  The Repricing Dates are the fifth trading day following the date the
Registrant  issues press releases  announcing its financial  performance for the
fiscal quarters  ending on March 31, 1996,  September 30, 1996 and September 30,
1997 and the fiscal year ending on December 31, 1996 and the  Repricing  Periods
are the dates between the dates of the press  releases and the Repricing  Dates.
Accordingly,  the  number  of  Additional  Shares  issuable  in  the  future  in
connection  with the MEDTOX  acquisition  cannot be  determined at this time and
will depend upon changes in the market price of the Common Stock, as well as the
extent to which  MEDTOX  shareholders  retain the  MEDTOX  shares on each of the
Repricing Dates. However, if all MEDTOX shares are retained on the Repricing 
Dates, an aggregate of 2,466,959 additional shares would be issuable based on 
the April 19, 1996 market price of $1.00 per share.
    
         The price protection provisions of the Series A Preferred Stock and the
MEDTOX  shareholders  could  result  in  the  Company  being  required  to issue

                                      7
<PAGE>
   
more  shares  of  Common  Stock  than  the  Company  is authorized to issue. The
Company's  Certificate  of  Incorporation  currently  authorizes the issuance of
30,000,000  shares of Common Stock,  of which  15,592,798  shares are  currently
issued and outstanding. 1,736,133 shares of Common Stock are issuable pursuant 
to outstanding stock options, stock purchase  plans and  warrants. If the 
remaining outstanding shares of the Series A Preferred Stock were to be 
converted  at a 25% discount  from the $1.00 per share  market price of the 
Company's  Common  Stock on April 19,  1996, 23,333,333  shares of Common 
Stock would be issuable upon conversion of the Series A  Preferred Stock. 
Accordingly, if all the remaining Series A Preferred Shares are converted at 
these prices, the Company would not have enough shares to issue to all of the
preferred shareholders and for future use. The  Company's  Certificate of 
Incorporation also authorizes  the issuance of 1,000,000 shares of Preferred 
Stock for which the Board of Directors has the power to designate the rights 
and preferences,  of which only 350 shares are issued and  outstanding. The 
Company intends to hold a special shareholders meeting to amend the 
Certificate of Incorporation of the Company to increase the number of 
authorized shares of Common Stock of the Company, which additional shares 
would be available to satisfy the price protection provisions of the  Series A 
Preferred Stock and the MEDTOX shareholders and for other corporate purposes.
At such time as additional shares are authorized, the Company will be 
obligated to file a Registration Statement covering additional "Price 
Protection Shares" based on the number of shares issuable to the MEDTOX 
shareholders and Series A Preferred Stockholders at current market prices.
    

         The price  protection  provisions  of the Series A Preferred  Stock are
transferred  upon any transfer of the Series A Preferred  Stock,  but  terminate
upon conversion of the Series A Preferred Stock.  The price protection  afforded
the MEDTOX  shareholders  terminates upon transfer of the Common Stock issued to
MEDTOX shareholders.

         Other  shareholders  of the  Company  do not have the price  protection
afforded  holders  of  Series A  Preferred  Stock and the  MEDTOX  shareholders.
Accordingly,  if the market price of the Common  Stock of the Company  declines,
the interests in the Company's other  shareholders  will be diluted by the price
protection  provisions  afforded  holders  of Series A  Preferred  Stock and the
MEDTOX  shareholders.  Substantial sales of shares of Common Stock by the MEDTOX
shareholders or purchasers of Series A Preferred Stock or other shareholders may
have a material  adverse  effect on the market  price of the Common Stock of the
Company, which would increase the number of Additional Shares issuable to MEDTOX
shareholders  on the  Repricing  Dates and the number of shares of Common  Stock
issuable upon conversion of the Series A Preferred Stock.

         7.  Obsolescence and  Technological  Change.  Modern  biotechnology has
undergone, and continues to undergo, rapid and significant technological change.
The  Company  requires  adequate  financial  resources  in order to  maintain  a
competitive  position with respect to its  technology and to continue to attract
and retain  qualified  technical  personnel.  These  financial  resources may be
unavailable.  The Company concentrates its research and development resources on
those  products  which it believes  will generate the most revenue

                                    8
<PAGE>

most  quickly.  There  can  be no assurance,  however, that future technological
developments  will  not  render existing or  proposed  products  of the  Company
uneconomical  or obsolete.


         8.       Competition.

                   Laboratory  Services.  Competition  in the  area of  drugs of
abuse testing is intense. Competitors and potential competitors include forensic
testing units of large clinical laboratories,  such as Laboratory Corporation of
America Holdings, Corning/Metpath Laboratories and SmithKline Laboratories, Inc.
and other independent laboratories, other specialized laboratories, and in-house
testing facilities maintained by hospitals.

                  Competitive factors include reliability and accuracy of tests,
price structure, service,  transportation collection networks and the ability to
establish  relationships  with  hospitals,  physicians,  and users of drug abuse
testing programs. It should be recognized, however, that many of the competitors
and  potential  competitors  have  substantially  greater  financial  and  other
resources than the Company.

                  The industry in which the Company competes is characterized by
service issues  including,  turn-around  time of reporting  results,  price, the
quality  and  reliability  of  results,  and  an  absence  of  patent  or  other
proprietary  protection.  In addition,  since tests performed by the Company are
not protected by patents or other proprietary  rights,  any of these tests could
be performed by competitors.  However, there are proprietary assay protocols for
the more specialized testing that are unique to the Company.

                  Some specific segments of the laboratory  testing business are
price  competitive  with low margins.  Other segments,  which place a premium on
quality,  constitute  a large part of the  business of MEDTOX,  where,  to date,
quality service has been a more important  competitive  factor than price.  This
has allowed MEDTOX to generate positive gross margins and operating income.  The
Company's ability to successfully  compete in the future and maintain it margins
will be based on its  ability to  maintain  its  quality  and  customer  service
strength while maintaining efficiencies and low cost operations. There can be no
assurance  that price  competitiveness  will not  increase  in  importance  as a
competitive factor in the business of MEDTOX.

                  Immunoassay  Tests.  The diagnostics  market has become highly
competitive with respect to the price,  quality and ease of use of various tests
and is characterized by rapid technological and regulatory changes.  The Company
has  designed  its  on-site  tests  as  inexpensive,  on-site  tests  for use by
unskilled  personnel,  and has not  endeavored to compete with  laboratory-based
systems.  Numerous  large  companies  with  greater  research  and  development,
marketing,  financial,  and  other  capabilities,  as well as  government-funded
institutions and smaller  research firms,  are engaged in research,  development
and marketing of diagnostic  assays for  application  in the areas for which the
Company produces its products.

                                   9
<PAGE>


                  The Company has experienced increased competition with respect
to its immunoassay tests from systems and products developed by others,  many of
whom compete solely on price. As the number of firms marketing  diagnostic tests
has grown, the Company has experienced  increased price  competition.  A further
increase in competition  may have a material  adverse effect on the business and
future financial prospects of the Company.

         9. Inadequacy of Patents and Proprietary  Information  Protection.  The
Company holds nine issued United States  patents of which eight of these patents
generally   form  the  basis  for  the  EZ-SCREEN  and  one-step   technologies.
Additionally,  the Company has one patent that  relates to methods of  utilizing
whole blood as a sample  medium on its  immunoassay  devices.  The Company  also
holds various patents in several foreign  countries.  The Company also holds two
United  States  patents  which  it  acquired  in  the   acquisition  of  Granite
Technological Enterprises, Inc. in 1986.

                  Of the eight U.S.  patents  mentioned  above,  which generally
form the basis for the EZ-SCREEN and one-step technologies, one expires in 2000,
one expires in 2004,  five expire in 2007,  and one expires in 2010.  The patent
which relates to the methods of utilizing whole blood as a sample medium expires
in 2012.

                  There can be no  guarantee  that there will not be a challenge
to the  validity of the patents.  In the event of such a challenge,  the Company
might be required to spend  significant  funds to defend its patents,  and there
can be no assurance that the Company would be successful in any such action.

                  The  Company  holds  twelve   registered  trade  names  and/or
trademarks  in reference to its products and  corporate  names.  The trade names
and/or trademarks of the Company range in duration from ten to twenty years with
expiration dates from 2001 to 2008.  Additionally,  applications  have been made
for additional trade names.


                  The Company believes that the basic technologies  requisite to
the  production of antibodies  are in the public domain and are not  patentable.
The Company intends to rely upon trade secret protection of certain  proprietary
information,  rather than patents,  where it believes disclosure could cause the
Company to be vulnerable to  competitors  who could  successfully  replicate the
Company's production and manufacturing techniques and processes.


                  10.  Government  Regulation.  The products and services of the
Company are subject to the regulations of a number of  governmental  agencies as
listed below.  It is believed  that the Company is currently in compliance  with
all

                                     10
<PAGE>

regulatory  authorities.  The Company  cannot  predict whether future changes in
governmental  regulations  might  significantly  increase  compliance  costs  or
adversely  affect  the  time or cost  required  to  develop  and  introduce  new
products.  In  addition,  products of the  Company are or may become  subject to
foreign regulations.


                           a.       United  States Food and Drug  Administration
(FDA).  Certain tests that will be  administered  to humans  must be cleared  by
the  FDA prior to their  marketing  for in vitro  diagnostic  use in the  United
States.  The  FDA  regulated  products  produced  by  the  Company  are in vitro
diagnostic  products  subject  to  FDA  clearance  through  the  510(k)  process
which  requires  the  submission  of  information  and  data  to  the  FDA  that
demonstrates  that  the device  to be marketed is substantially  equivalent to a
currently  marketed  device.  This  data  is  generated  by performing  clinical
studies  comparing  the  results  obtained using the  Company's  device to those
obtained  using  an  existing  test  product.  Although  no   maximum  statutory
response  time  has  been  set  for review of a 510(k) submission as a matter of
policy the FDA has  attempted  to complete  review of 510(k) submissions  within
90 days.  To date,  the Company has received  510(k) clearance  for 10 different
products  and  the  average  time  for  clearance was 58 days with a maximum  of
141 days  and a minimum of 20 days.  Products  subject to 510(k) regulations may
not  be  marketed  for  in  vitro  diagnostic  use until the FDA issues a letter
stating  that a  finding of  substantial equivalence  has been made. There is no
assurance  that  the Company  will  obtain  FDA  approval  on a timely basis for
future 510(k)  submissions and  failure to receive  approval may have a material
adverse effect on the Company's  business,  financial  condition and operations.

         As a registered  manufacturer of FDA regulated products, the Company is
subject  to a  variety  of FDA  regulations  including  the  Good  Manufacturing
Practices  (GMP)  regulations  which  define  the  conditions  under  which  FDA
regulated products are to be produced. These regulations are enforced by FDA and
failure to comply with GMP or other FDA  regulations  can result in the delay of
premarket product reviews, fines, civil penalties, recall, seizures, injunctions
and criminal prosecution.  FDA's regulatory requirements and related enforcement
activities  may  have a  material  adverse  effect  on the  Company's  business,
financial condition and operations.

                  b. Health Care Financing  Administration  (HCFA). The Clinical
Laboratory  Improvement Act (CLIA) introduced in 1992 requires that all in vitro
diagnostic products be categorized as to level of complexity. A request for CLIA
categorization  of  any  new  clinical  laboratory  test  system  must  be  made
simultaneously  with FDA 510(k) submission.  The complexity  category to which a
clinical laboratory test system is assigned may limit the number of laboratories
qualified to use the test system thus impacting product sales. The IN VITRO
diagnostic products manufactured and/or sold by EDITEK have been categorized
as moderately complex, which permits use of the products in both physician
offices and clinical laboratories which meet certain quality control and
personnel standards.

                                     11
<PAGE>


                  c.  United  States  Department  of  Agriculture   (USDA).  The
Company's   animal   facilities  are  subject  to  and  comply  with  applicable
regulations  of the USDA.  The  livestock  related  products  of the Company may
become  subject to state  regulation  but the Company  does not  anticipate  any
difficulties in complying with these regulations, if enacted.

                  d.  United   States   Department   of  Defense   (DOD).   With
reclassification  of the Company's  contract with the DOD from  UNCLASSIFIED  to
SECRET, it has been necessary to establish the appropriate  security  procedures
and  facilities,  including  designation of a Facility  Security  Officer who is
responsible for overseeing the security  system,  including  conduct of periodic
security audits by appropriate  defense agencies.  Additionally,  the Company is
now  subject to  periodic  audits of its  accounting  systems and records by the
Defense Audit Agency.

                  e. Drug Enforcement Administration (DEA). The primary business
of the Company  involves  either  testing for drugs of abuse or developing  test
kits for the  detection  of  drugs/drug  metabolites  in urine.  PDLA and MEDTOX
laboratories  are  registered  with the DEA to conduct  chemical  analyses  with
controlled  substances.  The  EDITEK  facility  is  registered  by  the  DEA  to
manufacture and distribute  controlled  substances and to conduct  research with
controlled  substances.  Maintenance  of these  registrations  requires that the
Company  comply  with  applicable  DEA  regulations.  Failure of the  Company to
maintain the required DEA registrations  would have a material adverse effect on
the  Company's  ability  to  develop  and  produce  drug test kits or to provide
laboratory testing services thus adversely  effecting the Company's business and
financial condition.

                  f. Substance Abuse and Mental Health  Services  Administration
(SAMHSA).  Both PDLA and MEDTOX laboratories are certified by SAMHSA, PDLA since
1989 and  MEDTOX  since  1988.  SAMHSA  certifies  laboratories  meeting  strict
standards  under Subpart C of Mandatory  Guidelines  for Federal  Workplace Drug
Testing  Programs.  Continued  certification  is accomplished  through  periodic
inspection by SAMHSA to assure compliance with applicable  regulations.  Failure
of the Company to maintain SAMHSA certification would limit the potential client
base to which laboratory services could be marketed thus impacting revenues from
laboratory operations.

                  g.  Additional  Laboratory  Regulations.  The PDLA and  MEDTOX
laboratories  and certain of the laboratory  personnel are licensed or otherwise
regulated by certain federal agencies,  states, and localities in which PDLA and
MEDTOX conduct business.  Federal,  state and local laws and regulations require
PDLA  and  MEDTOX,   among  other  things,  to  meet  standards   governing  the
qualifications of laboratory owners and personnel, as well as the maintenance of
proper   records,   facilities,   equipment,   test   materials,   and   quality


                                    12
<PAGE>

control  programs.  In  addition,  both  laboratories are subject to a number of
other federal, state, and  local  requirements  which  provide for inspection of
laboratory  facilities  and  participation  in proficiency  testing,  as well as
govern the transportation, packaging, and labeling of specimens tested by either
laboratory.   The   laboratories  are  also  subject  to  laws  and  regulations
prohibiting  the  unlawful  rebate  of fees and  limiting  the  manner  in which
business may be solicited.


         Both  laboratories  receive  and  use  small  quantities  of  hazardous
chemicals  and  radioactive  materials in their  operations  and are licensed to
handle and dispose of such  chemicals and  materials.  Any business  handling or
disposing of hazardous and radioactive waste is subject to potential liabilities
under certain of these laws.
   
         11.  Dependence on Key Personnel.  Although the Company believes it has
been  successful to date in recruiting and retaining  qualified  personnel,  the
growth of the  Company is  dependent  on its  ability to continue to attract the
services of qualified executive,  technical and marketing personnel. The Company
has  entered  into an  employment  agreement  with James D.  Skinner,  Chairman,
President  and CEO, Peter J. Heath, Vice President Finance and Chief Financial 
Officer and Michael A. Terretti, Vice President EDITEK and Executive Vice 
President MEDTOX.  In  addition,  the  Company  has  entered  into  employment
agreements  with six  employees  of  MEDTOX.  The  Company  considers  these six
employees  critical to the continued  success of MEDTOX.  The Company  currently
does not maintain any life insurance  policy on any  personnel.  There can be no
assurance  the  Company  will be able to attract  and retain  the  personnel  it
requires.
    
         12. Possible Volatility of Stock Price. Factors such as announcement of
technological  innovations  or new  commercial  products  by the  Company or its
competitors,  governmental regulation, patent or proprietary right developments,
or public safety and health concerns may have a significant impact on the market
price of the  Company's  securities.  In  addition,  resales  of  securities  by
shareholders  may add  significantly to volatility.  Moreover,  there has been a
history in recent  years of  significant  volatility  in the  market  prices for
securities of companies in the biotechnology field.

         13. Potential  Conflicts  of  Interest.  The  Company  has  in the past
engaged in a number of material  transactions  with its  directors and executive
officers  and  may  engage  in  such  transactions  in  the  future.   All  such
transactions  have  been  in  the past, and will be in the future, approved by a
majority of the Company's disinterested directors.

         14. Dividends.  The Company, to date, has not declared or paid any cash
dividends.  The shares of Series A Preferred  Stock issued to finance the MEDTOX
acquisition have certain dividend  rights.  The Company's  ability to declare or
pay   such   dividends  are   restricted  by   certain  covenants  in  the  Loan

                                    13
<PAGE>

Agreement.  See "Number of Shares of Common  Stock  Rights of Series A Preferred
Stock" and "Number of Shares of Common Stock - Debt Financing."

         15.  Potential  Product  Liability.   Manufacturing  and  marketing  of
products by the Company entail a risk of product liability claims.  The exposure
to product liability claims in the past was mitigated to some extent by the fact
that the Company's products were principally directed toward food processors (as
contrasted with human  diagnostics) and most of its  Conventional  Biodiagnostic
Products were used as components in research,  testing or  manufacturing  by the
purchaser and conformed to the purchaser's  specifications.  On August 13, 1993,
the Company procured  insurance  coverage against the risk of product  liability
arising out of events after such date,  but such insurance does not cover claims
made  after  that  date  based on  events  that  occurred  prior  to that  date.
Consequently, for uncovered claims, the Company could be required to pay any and
all costs  associated with any product  liability claims brought against it, the
cost of defense whatever the outcome of the action,  and possible  settlement or
damages if a court rendered a judgment in favor of any plaintiff  asserting such
a claim against the Company.  Damages may include  punitive  damages,  which may
substantially  exceed actual  damages.  The obligation to pay such damages could
have a material adverse effect on the Company and exceed its ability to pay such
damages. No product liability claims are pending.

                  The MEDTOX and PDLA laboratory  testing services are primarily
diagnostic and expose the laboratories to the risk of liability claims. PDLA has
retained continuous  professional and general liability insurance coverage since
1985.  MEDTOX  has  retained  continuous   professional  and  general  liability
insurance  coverage  since  1984.  To  date,  PDLA or  MEDTOX  have  not had any
substantial  product liability and no material  professional  service claims are
currently pending.

         16.  Anti-Takeover  Effect of State Law and  Certain  Charter and Bylaw
Provisions.  The  Company's  Certificate  of  Incorporation  and Bylaws  contain
certain  provisions that could have the effect of making it more difficult for a
third party to acquire,  or of  discouraging  a third party from  attempting  to
acquire,  control of the Company.  For example,  the Board of Directors  has the
authority  to fix the rights and  preferences  of and issue  shares of Preferred
Stock without further action by stockholders.  Therefore,  Preferred Stock could
be issued without stockholder approval that could have voting, liquidation,  and
dividend rights  superior to that of existing  shares of the Company stock.  The
issuance of Preferred Stock could  adversely  affect the voting power of holders
of Common Stock and the  likelihood  that such holders  would  receive  dividend
payments and payments  upon  liquidation  and could have the effect of delaying,
deferring,  or preventing a change in control of the Company. The Company has no
present plan to issue any shares of Preferred  Stock.  Such provisions

                                    14
<PAGE>

may  limit the price that certain investors may be willing to pay in  the future
for shares of the Company's Stock.

                     NUMBER OF SHARES OF COMMON STOCK
   
         This Prospectus relates to a total of 11,798,193 shares of Common Stock
of the  Company.  2,517,306  of these  shares of Common Stock were issued to MLI
pursuant  to the MEDTOX  Agreement  and 235,295  shares  were sold to Dr.  Harry
McCoy, a shareholder of MEDTOX, immediately following the acquisition of MEDTOX.
Of the shares  issued to MLI,  2,391,441  shares  have been  distributed  to the
shareholders of MEDTOX and 125,865 shares are being held in an escrow account to
satisfy certain  contingent  indemnification  obligations of MLI pursuant to the
MEDTOX  Agreement.  This Prospectus also relates to shares of Common Stock which
are  issuable to the holders of 104 shares of Series A Preferred  Stock upon the
conversion  of the  Series A  Preferred  Stock of which a minimum  of  1,873,873
shares of Common Stock are issuable and 906,667  shares of Common Stock issuable
upon the exercise of the Investment Banker Warrants.
    
Price Protection Shares

         This Prospectus  also relates to 6,265,052  shares of Common Stock (the
"Price  Protection  Shares") which may be issued to the former  shareholders  of
MEDTOX  and upon the  conversion  of the  Series A  Preferred  Stock in  certain
circumstances in the future as described below.

   
         The MEDTOX Asset Purchase  Agreement  which provides that, if after the
Closing Date the market value of the Common Stock of the Company  declines below
$1.986 per share during the Repricing  Periods  following  press  releases,  the
Company will issue additional  shares of Common Stock  ("Additional  Shares") to
shareholders  of MEDTOX who retain  their  shares of Common  Stock  through four
specified  dates (the "Repricing  Dates") to compensate the MEDTOX  shareholders
for  decreases in the market price of the shares after the closing of the MEDTOX
acquisition  in the market price of the Common Stock of the Company below $1.986
per share.  The Repricing Dates are the fifth trading day following the date the
Registrant  issues press releases  announcing its financial  performance for the
fiscal quarters  ending on March 31, 1996,  September 30, 1996 and September 30,
1997 and the fiscal year ending on December 31, 1996 and the  Repricing  Periods
are the dates between the press releases and the Repricing Dates.  Consequently,
the number of Additional  Shares  issuable in the future in connection  with the
MEDTOX  acquisition  cannot  be  determined  at this time and will  depend  upon
changes in the market price of the Common Stock,  as well as the extent to which
MEDTOX shareholders retain the MEDTOX shares on each of the Repricing Dates.
If all MEDTOX shares are retained on the Repricing Dates, an aggregate of
2,466,959 Additional Shares would be issuable based on the April 19, 1996
market price of $1.00 per share.
    

                                   15
<PAGE>

   
         The Preferred Stock is convertible  into shares of Common Stock, at any
time from March 30,  1996,  the 60th day after the shares of Series A  Preferred
Stock were first issued by the Company (the "Initial  Conversion  Date"),  until
January 30, 1998, the second anniversary of the Initial Preferred Issuance Date,
at which time all conversion rights terminate and any remaining shares of Series
A Preferred  Stock will be  automatically  converted,  at a rate determined by a
formula  based on a discount  from the market  price of the Common  Stock at the
time of conversion,  unless the holder of such Series A Preferred Stock notifies
the  Company not to convert  such  shares.  The Series A Preferred  Stock has no
voting power and has certain  liquidation  preference and dividend  rights.  The
number of shares of Common Stock issuable upon conversion of a share of Series A
Preferred Stock will equal the number derived by dividing (i) the purchase price
of the Series A Preferred  Stock ($50,000 per share) by the lesser of (i) $2.775
or (ii) 75% of the  Market  Price of the  Common  Stock on the day the shares of
Series A Preferred  Stock are  converted  into Common Stock.  "Market  Price" is
defined for this purpose as the daily  average of the closing bid prices  quoted
on the American  Stock  Exchange or other  exchange on which the Common Stock is
traded for the five trading days  immediately  preceding the date the shares are
converted.  The actual number of shares of Common Stock issuable upon conversion
of the 104  shares  of  Series A  Preferred  Stock  will not be known  until the
Conversion  Date of such shares,  but will not be less than 1,873,873  shares if
all 104 shares of Series A Preferred Stock are converted.  As of April 19, 1996,
the  market  price of the  Common  Stock was $1.00 per share at which  price 104
shares of Series A Preferred Stock would be convertible into 6,933,333 shares of
Common Stock.
    

         The price  protection  provisions  of the Series A Preferred  Stock are
transferred  upon any transfer of the Series A Preferred  Stock,  but  terminate
upon conversion of the Series A Preferred Stock.  The price protection  afforded
the MEDTOX  shareholders  terminates upon transfer of the Common Stock issued to
the MEDTOX shareholders.
   
        The Company will not receive any proceeds from the sale of shares by the
Selling Shareholders. The Company will, however, receive an average of $2.83 per
share upon the exercise of the Investment Banker Warrants. See "Selling 
Shareholders" and "Plan of Distribution."
    
         The number of shares of Common  Stock  described  above  includes  only
shares covered by this  Prospectus and does not include the minimum of 5,459,460
shares of Common Stock issuable upon conversion of 303 shares of Preferred Stock
sold by the Company to offshore investors pursuant to Regulation S.

                                  16
<PAGE>

   
         The Common Stock is traded on the  American  Stock  Exchange  under the
symbol  "EDI." On April 19,  1996,  the  closing  price of the  Common  Stock as
reported by the American Stock Exchange was $1.00 per share.
    

Debt Financing

         To finance the  acquisition of MEDTOX and to provide  working  capital,
the Company  borrowed  $4,990,000  as of January 30,  1996.  The debt  financing
consists  of two term loans of $2 million  each and a  revolving  line of credit
based  on the  accounts  receivable  and  inventory  of the  Company.  The  Loan
Agreement  contains  certain  restrictions  on the  payment  of  dividends.  The
capitalized  terms  below are  defined  in the Loan  Agreement.  The  Company is
restricted  from  paying any  dividends  until  February 1, 1997 and only in the
amount  not in excess of  one-third  of the  Excess  Cash Flow for the  previous
fiscal  year.  For this  purpose,  Excess Cash Flow means,  for any period,  the
greater of (A) zero (0); or (B) without duplication,  the total of the following
for the Company and its respective  Subsidiaries on a consolidated  basis,  each
calculated for such period: (1) EBITDA;  plus (2) tax refunds actually received;
less (3) Capital Expenditures (to the extent actually made in cash and or due to
be made in cash within such period); less (4) income and franchise taxes paid or
accrued excluding any provision for deferred taxes included in the determination
of net income;  less (5)  decreases  in deferred  income  taxes  resulting  from
payments of deferred taxes accrued in prior periods;  less (6) Interest Expenses
paid or accrued;  less (7) scheduled  amortization of Indebtedness actually paid
and/or due to be paid within such period less (8) voluntary  prepayments  of the
Term Loans.  In addition,  the Company is  restricted  from paying any dividends
until the first of the two term loans is paid off and after giving effect to any
such dividend payment,  the Company must have at least $500,000  available under
the revolving line of credit.  The last  scheduled  payment of that term loan is
July 1, 1997.

Capital Stock
   
         As of April 19, 1996, the Company's  authorized capital stock consisted
of 30,000,000  shares of Common Stock,  par value $.15 per share,  480 shares of
Series A Preferred  Stock (of which 350 shares were issued and outstanding as of
April 19, 1996) and 999,520 shares of undesignated  Preferred Stock, par value
$1.00 per share.  Each share of the Series A Preferred Stock is convertible into
shares of Common  Stock of the  Company.  See  "Rights of the Series A Preferred
Shares."  The Board of  Directors  is  authorized,  subject  to any  limitations
prescribed by law, without further stockholder  approval,  to issue from time to
time  additional  shares of Preferred  Stock,  in one or more classes or series.
Each  class or series of  Preferred  Stock  shall  have such  number of  shares,
designations, preferences, voting powers, qualifications and special or relative
rights or privileges as shall be determined by the Board of Directors,
    
                                     17
<PAGE>

which  may include, among others, dividend rights, voting rights, redemption and
sinking  fund   provisions,  liquidation  preferences,  conversion   rights  and
preemptive rights.

Rights of Common Stock

         Holders of Common Stock are entitled to one vote for each share held on
all  matters  submitted  to a vote of  stockholders  and do not have  cumulative
voting rights.  Accordingly,  stockholders casting a plurality of the votes cast
by the  stockholders  entitled to vote in an election of directors may elect all
of the directors standing for election.

         Holders of Common Stock are entitled to receive ratably such dividends,
if any,  as may be  declared  by the  Board of  Directors  out of funds  legally
available  therefore,  subject to any  preferential  dividend rights of Series A
Preferred  Stock and other  Preferred  Stock  that may be issued in the  future.
Delaware  law  prohibits  the payment of  dividends  or other  distributions  to
holders  of shares of Common  Stock if after the  payment  the net assets of the
Company  would  be less  than its  capital.  In  addition,  the  Company  may be
prohibited  from paying  dividends  under the terms of loan  agreements or other
contracts.

         Upon the  liquidation,  dissolution  or winding up of the Company,  the
holders of Common  Stock are  entitled to receive  ratably the net assets of the
Company  available  after the  payment  of all debts and other  liabilities  and
subject to the prior rights of Preferred Stock that may be issued in the future.
Holders of Common Stock have no preemptive,  subscription or conversion  rights.
The  outstanding  shares of Common  Stock  are,  and the  shares  issuable  upon
conversion  of Series A Preferred  Stock and upon  exercise of warrants and when
issued  pursuant  to the MEDTOX  Agreement  will be,  when  issued and paid for,
fully-paid and nonassessable.  The rights, preferences and privileges of holders
of Common Stock are subject to the rights of the holders of shares of the Series
A  Preferred  Stock and any other  class or series of  Preferred  Stock that the
Company may designate and issue in the future.

         The issuance of Preferred Stock could have the effect of making it more
difficult for a third party to acquire,  or of  discouraging  a third party from
acquiring,  a majority  of the  outstanding  voting  stock of the  Company.  The
Company has no present plans to issue any additional shares of Preferred Stock.

Rights of the Series A Preferred Stock

         The  principal  rights of the Series A Preferred  Stock are  summarized
below. This description is qualified, and subject to the rights set forth in the
Certificate  of  Designations  of EDITEK,  Inc.  Series A Convertible  Preferred
Stock.

                                     18
<PAGE>

         Conversion  Rights.  The Series A Preferred  Stock is convertible  into
shares of Common Stock with the number of shares  issuable  upon  conversion  of
each share of Series A Preferred  Stock to be  determined  by  dividing  (i) the
aggregate  price paid for the Series A Preferred  Stock ($50,000 per share),  by
(ii) the lower of (a) $2.775 or (b)  Seventy-Five  Percent  (75%) of the average
closing bid price of the Common Stock of the Company  over the  five-day  period
immediately  preceding  the  conversion  date. As the market price of the Common
Stock  changes from day to day, the number of shares  issuable  upon  conversion
will vary depending upon the conversion date.

         The Series A Preferred  Stock will be  automatically  converted  if not
converted on or before January 30, 1998 unless a holder of such shares instructs
the Company not to convert the  shares.  No shares may be  converted  during the
fifty-nine  (59) days after issuance of the first The Series A Preferred  Stock.
Commencing March 30, 1996, all the Series A Preferred Stock can be converted.

         Voting  Rights.  Except as  required by  applicable  law,  the Series A
Preferred  Stock does not have voting rights.

         Dividend  Rights.  The Series A  Preferred  Stock will accrue an annual
dividend  of  Four  Thousand  Five  Hundred  ($4,500)  Dollars  per  share  (the
"Preferred  Dividend").  Such  Preferred  Dividend  shall be payable when and as
declared  by the  Board of  Directors  in its  sole  discretion.  The  Preferred
Dividend is  cumulative  until  December  31,  1997.  Dividends  accruing  after
December 31, 1997 will not be cumulative. No dividend shall be payable on shares
of Common Stock of the Company until all accrued cumulative unpaid dividends are
paid to holders of the Series A Preferred Stock.

         Liquidation  Preference.  Holders of shares of Series A Preferred Stock
will have a  preference  upon the  liquidation  of the  Company  over the Common
Stock. The initial  liquidation  preference shall equal Fifty Thousand ($50,000)
Dollars  per share of Series A Preferred  Stock and shall  increase to equal the
sum of Fifty Thousand ($50,000) Dollars,  plus all accrued but unpaid cumulative
Preferred  Dividends,  plus all  declared  but  unpaid  noncumulative  Preferred
Dividends.  After payment in full of the liquidation preference,  the holders of
Series A  Preferred  Stock  shall not be  entitled  to  receive  any  additional
liquidation payments.

                                THE COMPANY

         EDITEK, Inc., a Delaware corporation,  was organized in September, 1986
to succeed the operations of a predecessor California corporation.  EDITEK, Inc.
and its  subsidiaries  are  referred  to herein as "the  Company".  The  Company
operates  a  toxicology   laboratory   that   provides   testing   services  for
identification  of substances of abuse and  develops,  manufactures  and markets
on-site  diagnostic

                                   19
<PAGE>

and screening  tests which are used to detect  substances in humans, foodstuffs,
animals or feed and the environment.

         The Company  entered the laboratory  business on February 11, 1994 when
it completed the  acquisition of Princeton  Diagnostic  Laboratories of America,
Inc. ("PDLA") which is now a wholly owned  subsidiary.  PDLA was incorporated in
Delaware in December,  1986.  On December 22, 1986,  it acquired  from  Stauffer
Chemical Company,  a subsidiary of  Cheesebrough-Pond's  Inc., all of the Common
Stock of Psychiatric  Diagnostic  Laboratories of America,  Inc.,  through which
PDLA conducts most of its operations.  On January 30, 1996, the Company acquired
the assets and certain  liabilities of another  laboratory,  MEDTOX.  MEDTOX was
formed in 1984 and is  located  in St.  Paul,  Minnesota.  MEDTOX  enjoys a well
deserved reputation for quality and customer service and is often referred to in
the laboratory industry as a "Laboratory's Laboratory."

         MEDTOX was  co-founded  in 1984 by Dr. Harry  McCoy.  Dr. McCoy saw the
need for a state-of-the-art,  full service, toxicology reference laboratory that
would provide  timely,  accurate  analysis for a wide range of drugs and toxins.
From its  inception,  MEDTOX has  fulfilled  that goal by  offering  broad-based
toxicology services, including 24 hour emergency service at no extra cost to the
client, therapeutic drug monitoring, medico-legal investigations, etc.

         MEDTOX rapidly gained a reputation for high quality and superb customer
service  in  the  local  Minnesota  medical  market  through  the  provision  of
toxicology  laboratory  services  for local  hospitals,  physicians  and general
medical laboratories.  MEDTOX then began an expanded regional program as well as
national marketing which increased revenues and expanded the customer base.

         In  1987,   MEDTOX  purchased  its  largest   Minneapolis   competitor,
Metropolitan  Medical Center, and gained the services of Dr. Gary Hemphill,  one
of the leading scientists and laboratory directors at MEDTOX today. Dr. Hemphill
and MMC also gave MEDTOX a foothold in the burgeoning  employment drug screening
business, forensic toxicology market.

         With the creation of National Institute for Drug Abuse ("NIDA") in 1988
to oversee mandated drug screening for safety sensitive employees, MEDTOX became
one of the first ten  laboratories  in the country on the original  list of NIDA
certified  laboratories.   MEDTOX  business  then  rapidly  grew  in  two  major
toxicology market segments:

   1. Forensic toxicology (substance abuse testing).
   2. Medical toxicology - the provision of reference  toxicology testing in the
      areas of therapeutic drug monitoring,  etc., for hospitals, physicians and
      general  clinical  laboratories   lacking  the  sophisticated   toxicology
      capabilities of MEDTOX.

                                   20
<PAGE>


         For the year  ended  December  31,  1995,  MEDTOX had net  revenues  of
$20,219,000 with net income of $2,879,000.

         The  combination  of the  laboratory  services of PDLA,  MEDTOX and the
Company's other products and services allows the Company to offer a full line of
products and services for the substance abuse testing marketplace, including (1)
on-site  tests for the detection of substance of abuse drugs  (EZ-SCREEN(R)  and
VERDICT(R));  (2) on-site qualitative and quantitative  determination of alcohol
intoxication (both disposable and electronic instrument detection devices);  (3)
Substance Abuse and Mental Health  Services  Administration  (SAMHSA),  formerly
NIDA, certified  laboratory testing (screening and confirmation);  (4) accessory
items (gloves, specimen containers, permanent recording temperature strips); and
(5) consultation (National Consortium For a Drug-Free Workplace) (NCDFW). All of
these  products and services  will be marketed  through  MEDTOX.  Sales of these
Substance Abuse Testing Products and Services accounted for approximately 72% of
the revenues of the Company for the year ended December 31, 1995.

          In 1993  diAGnostix,  inc. was incorporated by the Company in Delaware
as a wholly  owned  subsidiary  to address  the  broadly  defined  environmental
testing  marketplace.  In 1995, the Company acquired Bioman  Products,  Inc. and
successfully  developed and  introduced to the market the  EZ-QUANT(R)  DON Test
Kit.  Development of new food safety testing products by the Company  continues,
with at least one new  product  launch  planned  for 1996.  diAGnostix,  inc. is
currently  sourcing  additional  products  manufactured  by other companies that
could be sold  through  diAGnostix,  inc.  Sales of the  products  sold  through
diAGnostix,  inc.  accounted for approximately 16% of the Company's revenues for
the year ended December 31, 1995.

         The Company also sells  prepared and dehydrated  culture media,  animal
blood products,  sera and plasma, custom antisera, and other biomedical products
and supplies,  which are either  produced by the Company or purchased from other
suppliers.  The Company  also  markets  contract  manufacturing  services  which
utilize the same  manufacturing  equipment and processes used to manufacture the
on-site products. The Company expects sales of these products,  which were first
introduced in 1986, to account for a smaller  portion of its future revenues due
to the highly  competitive  nature of that market and  management's  decision to
focus  primarily  on the  marketing  of its  diagnostic  tests.  Sales  of these
products  accounted for  approximately 5% of the revenues of the Company for the
year ended December 31, 1995.

                                    21
<PAGE>


         The balance of the Company's  revenues are from work  performed for the
U.S.  Department of Defense including  product sales as well as royalties,  fees
and other income. These revenues  represented  approximately 7% of the Company's
revenues for the year ended December 31, 1995.

         EDITEK executive offices are located at 1238 Anthony Road,  Burlington,
North Carolina 27215, and its telephone number is (910) 226-6311.

                             SELLING SHAREHOLDERS
   
         This Prospectus  relates to an aggregate total of 11,798,193  shares of
the Common Stock, of which (i) 2,517,306  shares were issued to MLI Dissolution,
Inc. (formerly MEDTOX Laboratories,  Inc.) ("MLI") pursuant to an Asset Purchase
Agreement between the Company and MLI, with 2,391,441 shares being  subsequently
distributed to the  shareholders of MEDTOX ("MEDTOX  Shareholders")  and 125,865
shares  being  held in  escrow to  satisfy  certain  contingent  indemnification
obligations  of MEDTOX,  (ii)  235,295  shares  were  issued to Dr.  Harry McCoy
("McCoy") in a private placement that occurred following the MEDTOX acquisition;
(iii) a minimum of  1,873,873  shares  ("Conversion  Shares")  are  issuable  to
certain  holders  (the "Series A Preferred  Shareholders")  of 104 shares of the
Company's  Series A Preferred Stock upon conversion of the Preferred  Stock; and
(iv) 586,667 shares are issuable to Harlan Kleiman and affiliated persons 
("Placement Agent") upon the exercise of Investment Banker Warrants issued as  
compensation for sales of the Series A Preferred Stock pursuant to an agreement
between Placement Agent and the Company and 320,000 issuable to Harlan Kleiman 
as Compensation for the sale of securities in previous offerings. MLI, the 
MEDTOX Shareholders, McCoy, the Series A Preferred Shareholders and the 
Placement Agent are hereinafter referred to as the "Selling Shareholders". The 
remaining  6,265,052 shares ("Price  Protection  Shares") of Common Stock 
covered by this  Prospectus  are being  registered in the event the MEDTOX  
Shareholders  become entitled to receive "Additional Shares" and/or more
than the minimum number of Conversion  Shares become issuable upon conversion of
the Series A Preferred Stock. See "Number of Shares of Common Stock."
    
                                    22
<PAGE>


         Set forth below is a list and description of each Selling  Shareholder,
together  with the  number of Shares  beneficially  owned,  the number of Shares
being  offered,  and the number of Shares  (and the  percent of the class) to be
owned after completion of the offering.


<TABLE>
<CAPTION>
   
                               Material                                                Securities    Percent Common
                             Relationship        Securities                           Beneficially     Stock Owned
                             Had With the    Beneficially Owned                       Owned After         After
     Name of Selling        Company Within     As of February 7,     Securities      Completion of    Completion of
       Shareholder         Past Three Years       1996 (1)         Offered Hereby     Offering (2)      Offering
<S>                        <C>               <C>                   <C>               <C>             <C>

MEDTOX SHAREHOLDERS:

John Walker Abelson
and Beverly Jean Abelson   Shareholder             9,192 (3)          9,192 (3)            0                *

James S. Arrington         Shareholder            40,417 (3)         40,317 (3)          100                *

Richard A. Brotherton      Shareholder           112,887 (3)        112,887 (3)            0                *

Robert Brotherton          Shareholder            26,190 (3)         24,190 (3)        2,000                *

Judd Y. Carpenter          Shareholder            47,171 (3)         47,171 (3)            0                *

Matthew S. Carpenter       Shareholder            47,171 (3)         47,171 (3)            0                *

Scott M. Carpenter         Shareholder            47,171 (3)         47,171 (3)            0                *

Walter S. Carpenter and
Elsa M. Carpenter,
Trustees of the Walter
S. Carpenter Revocable
Trust                      Shareholder           113,694 (3)        113,694 (3)            0                *

Louis B. Hauser and Mary
M. Hauser                  Shareholder            37,092 (3)         37,092 (3)            0                *

D. Gary Hemphill           Shareholder           161,268 (3)        161,268 (3)            0                *

Donald Hunt and Johanne
Hunt                       Shareholder            18,385 (3)         18,385 (3)            0                *

William A. Jetter and
Mary E. Jetter             Shareholder            46,655 (3)         45,155 (3)        1,500                *

Marian M. Johnson, et
al., Trustees of the
Marian M. Johnson
Revocable Trust            Shareholder            43,139 (3)         43,139 (3)            0                *

Patsy O. Johnson and
Ramon E. Johnson           Shareholder             4,032 (3)          4,032 (3)            0                *

Ann C. Kay                 Shareholder            47,171 (3)         47,171 (3)            0                *

Paul A. Kay                Shareholder            33,624 (3)         33,624 (3)            0                *

Kingsley R. Labrosse       Shareholder           193,682 (3)        193,682 (3)            0                *

Mary J. Labrosse           Shareholder            75,472 (3)         75,472 (3)            0                *

                           Shareholder/
Harry G. McCoy             Director              687,007 (3) (4)    687,007 (3) (4)        0                *

Harry G. McCoy and
Julia McCoy                Shareholder           130,949 (3)        130,949 (3)            0                *

MLI Dissolution, Inc.      Shareholder           125,865 (3) (5)    125,865 (3) (5)        0                *

Charles F. Mettille and

                                    23
<PAGE>

Anita Mettille             Shareholder            32,254 (3)         32,254 (3)            0                *

Frank Mettille             Shareholder            80,634 (3)         80,634 (3)            0                *

Clifford T. Orton and
Ruth L. Orton              Shareholder           193,682 (3)        193,682 (3)            0                *

Clifford T. Orton, Jr.
and Andrea K. Orton        Shareholder             4,032 (3)          4,032 (3)            0                *

Thomas J. Orton            Shareholder             2,016 (3)          2,016 (3)            0                *

Nancy Pinto-Orton and
Brian R. Pinto             Shareholder             4,032 (3)          4,032 (3)            0                *

Andre C. Pool              Shareholder            16,127 (3)         16,127 (3)            0                *

Katherine L. Seifert       Shareholder             9,192 (3)          9,192 (3)            0                *

Michael Spiten and Linda
Spiten                     Shareholder             8,305 (3)          8,305 (3)            0                *

Harriet A. Thomas          Shareholder            76,602 (3)         76,602 (3)            0                *

Lowell Van De Riet and
Mary Van De Riet           Shareholder            29,351 (3)         29,351 (3)            0                *

Cynthia K. Veit            Shareholder           219,486 (3)        219,486 (3)            0                *

Donald Veit                Shareholder            16,127 (3)         16,127 (3)            0                *

Cheryl Wachenheim          Shareholder            18,127 (3)         16,127 (3)        2,000                *

SERIES A PREFERRED
SHAREHOLDERS:

Capital Ventures
International              Shareholder           360,360 (6)        360,360 (6)            0                *

Kensington Partners L.P.   Shareholder            90,090 (6)         90,090 (6)            0                *

Little Wing L.P.           Shareholder           270,270 (6)        270,270 (6)            0                *

Morgan Capital, L.L.C.     Shareholder           882,882 (6)        882,882 (6)            0                *

Santina Holding Corp.      Shareholder           270,270 (6)        270,270 (6)            0                *

PLACEMENT AGENT:

Harlan Kleiman             Placement Agent       737,320 (7)        737,320 (7)            0                *

Rob Schachter              Placement Agent       146,667 (7)        146,667 (7)            0                *

Wayne Colson               Placement Agent        22,680 (7)         22,680 (7)            0                *
    
</TABLE>

*        Less than 1%.

(1) Includes  Common  Stock as to which the holder has sole or shared  voting or
investment  power and Common Stock issuable  pursuant to options and/or warrants
exercisable within the next 60 days.

(2) Assumes all Shares being registered in this offering will be sold.  However,
to the best of the Company's  knowledge,  the holders of such securities have no
commitment to anyone to sell all or part of the securities being registered.

                                     24
<PAGE>
   
(3) Does  not  include  "Additional  Shares" which may become issuable to MEDTOX
shareholders  for  shares held on the "Repricing  Dates" in the event the market
price  of the Common  Stock of the Company is less than $1.986 on any  Repricing
Date.  See "Number of Shares of Common Stock - Price Protection Shares." If all
Medtox shares are retained on the Repricing Dates, an aggregate of 2,466,959 
Additional Shares would be issuable based on the April 19, 1996 market price of
$1.00 per share.
    
(4) Includes 235,295 shares of Common Stock purchased by McCoy after the  MEDTOX
acquisition,  which  235,295 shares  do  not  have  the  benefit  of  the  price
protection provisions of the MEDTOX Purchase Agreement. See "Number of Shares of
Common Stock."

(5) 125,865 shares held in escrow, subject to the indemnification  provisions of
the MEDTOX Purchase Agreement.  Any shares not delivered to the Company prior to
January 30, 1997 shall be delivered to MLI and the Company has been advised that
such shares will be distributed to the MEDTOX  shareholders  in connection  with
the   liquidation   and   dissolution   of  MLI  if  not  used  to  satisfy  the
indemnification obligations of MLI.

   
(6) The number of shares of Common  Stock  listed as  beneficially  owned is the
minimum  number of Conversion  Shares  issuable upon  conversion of the Series A
Preferred  Stock. A greater number of Conversion  Shares will be issuable to any
Series A Preferred  Shareholder  who exercises its Series A Preferred Stock at a
time when the market price of the Common Stock of the Company is less than $3.70
per share.  As of April 19, 1996, the market price of the Common Stock was $1.00
per share at which  price the 104 shares of Series A  Preferred  Stock  would be
convertible  into  6,933,333  shares of Common  Stock, resulting in a 270%
increase in the beneficial ownership shown in the table. See "Number of Shares
of Common Stock Price Protection Shares."
    

(7) Shares issuable upon the exercise of the  Investment  Banker  Warrants.  See
"Number of Shares of Common Stock ."

         If Additional  Shares become  issuable to any MEDTOX  Shareholder or if
more than the minimum number of Conversion  Shares become issuable to any Series
A  Preferred  Shareholder,  such  shares  will be  taken  from the pool of Price
Protection  Shares  registered  hereby  but not  listed  next to the name of any
Selling  Shareholder  in the table.  Price  Protection  Shares will be issued to
Selling  Shareholders  in the  chronological  order based on the date the shares
become  issuable.  In the  event  the  number  of  Additional  Shares  and extra
Conversion   Shares  issued  exceeds  the  number  of  Price  Protection  Shares
registered  hereby,  the Company intends to register more shares of Common Stock
to cover the deficiency when and as the need arises.

                              PLAN OF DISTRIBUTION

                                      25
<PAGE>

         The Selling Shareholders may from time to time effect the sale of their
Shares in one or more  transactions in the public market, at prices and at terms
then  prevailing or at prices related to the  then-current  market price,  or in
negotiated  transactions  or  otherwise.  The Shares may be sold pursuant to the
Registration  Statement,  another  registration  statement  or  pursuant  to  an
exemption  from  registration,  including  Rule 144.  If all or a portion of the
Shares are sold in such transactions,  they may be sold by means of: (a) a block
trade in which the broker or dealer so engaged  will  attempt to sell the Shares
as agent but may  position  and  resell a portion of the block as  principal  to
facilitate the  transactions;  (b) purchases by a broker as principal and resale
by such broker for its  account  pursuant  to this  Prospectus;  (c) an exchange
distribution  in  accordance  with the  rules  of such  exchange;  (d)  ordinary
brokerage transactions and transactions in which the broker solicits purchasers;
(e) short sales; or (f) a combination of the foregoing  methods. In effecting
sales, brokers or dealers engaged by the Selling Shareholders may arrange for 
other brokers or dealers to participate. The brokers or dealers engaged by the 
Selling Shareholders will receive commissions or discounts from the Selling 
Shareholders in amounts to be negotiated prior to the sale. Such brokers or 
dealers and any other participating brokers or dealers, as well as the Selling 
Shareholders, may be deemed to be "underwriters" within the meaning of the 
Securities Act in connection with such sales. To the best knowledge of the 
Company,  there are currently no plans, arrangements or understandings between 
any of the Selling Shareholders and any broker or dealer regarding the sale of 
stock by the Selling Shareholders.

                             RECENT DEVELOPMENTS

         On January 30, 1996,  the Company  completed the  acquisition of MEDTOX
pursuant to the MEDTOX  Agreement.  The purchase price for the MEDTOX assets and
the assumption of certain  liabilities  was $24 million of which $19 million was
paid in cash at closing and $5 million was paid in the form of 2,517,306  shares
of Common  Stock of the  Company.  The amount  used to  purchase  the assets and
certain  liabilities of MEDTOX was raised from the issuance of 380 shares of the
Series A Preferred  Stock and the borrowing of  approximately  $5 million by the
Company.

         To obtain funds  necessary to complete  the MEDTOX  Acquisition  and to
provide for the Company's  working capital needs, the Company and its affiliated
entities,  Psychiatric Diagnostic  Laboratories of America, Inc. and diAGnostix,
Inc.,  Delaware  corporations  and  wholly-owned  subsidiaries  of the  Company,
entered into a credit facility with Heller Financial, Inc. ("Heller") consisting
of two term loans in the amount of $2 million each,  one with an  eighteen-month
term and an  interest  rate equal to 2.5% plus the Bank Prime Rate and the other
with a  three-year  term and an interest  rate equal to 2.0% plus the Bank Prime
Rate, and a revolving line of credit of up to $7 million (the "Credit Facility")
with the amount available under the Credit Facility dependent upon the amount of
assets available to secure  borrowings  under


                                    26
<PAGE>

the Credit Facility.  The interest rate on the Credit  Facility is equal to 1.5%
plus the Bank Prime Rate. As of January 30, 1996 approximately $2.9 million  was
available  under the  Credit  Facility.  The  closing for the term loans and the
Credit  Facility  occurred on January 30, 1996.

         In  connection   with  the  Credit   Facility,   the  Company  and  its
subsidiaries  have granted Heller a security interest in substantially all their
assets and have agreed to comply with many financial and other  covenants  which
restrict  operations of the Company and its subsidiaries,  including the ability
to pay dividends.  See "Number of Shares of Common  Stock-Debt  Financing" for a
description of restrictions on dividends imposed by the Credit Facility.

         On January 31, 1996, the Board of Directors of the Company  elected two
additional members to the Board of Directors of the Company,  bringing the total
number of Directors to six. Dr. Harry McCoy was the President and  Co-Founder of
MEDTOX.  Dr. McCoy received his Bachelors  Degree in Biology from the University
of  California,  San Diego and a Doctorate in Pharmacy  from the  University  of
California,  San Francisco. He conducted his clinical internship at the Stanford
Medical  Center,   University  of  California  and  pursued  his   Post-Doctoral
Fellowship in  Pharmacokinetics  with the University of Minnesota  where he held
joint faculty  appointments  at the U. of M. College of Pharmacy and the Section
of Clinical Pharmacology at the St. Paul-Ramsey Medical Center.

         Mr. George  Masters  is  Vice  Chairman,  President and Chief Executive
Officer  of Seragen, Inc. Mr. Masters  has spend  his entire  business career in
the  healthcare  industry,  including  20  years  with  Warner-Lambert.  He left
Warner-Lambert  in  1983 as a  Group  President,  and  for the past 12 years has
held senior  management  positions  with a  number of  biotechnology  companies.
Mr. Masters has been a board member of approximately fifteen medically  oriented
companies and currently  serves  as a member of the Board of  Directors  of: CME
Telemetrix, Hemosol,  Inc., ImmuCell  Corporation,  Intelligent Medical Imaging,
and  Seragen. Mr. Masters  is  on  the Board of Directors  of the  Biotechnology
Industry  Organization  in   Washington,  DC  and   serves   on   its  Executive
Committee.  He  is  on  the Board of  Visitors  of Boston  University  School of
Medicine and the Board of Associates of the Whitehead  Institute for  Biomedical
Research  at MIT. He also acts as an investment advisor to three venture capital
funds.

                                  EXPERTS

         The consolidated  financial statements of EDITEK, Inc.  incorporated by
reference  in  EDITEK,  Inc.'s  Annual  Report  (Form  10-K) for the year  ended
December 31, 1995 have been audited by Ernst & Young LLP, independent  auditors,
as set forth in their report thereon included therein and incorporated herein by
reference.  Such consolidated  financial  statements are incorporated  herein by

                                   27
<PAGE>

reference in reliance  upon such report given upon the authority of such firm as
experts in accounting and auditing.


         The consolidated  financial statements of MEDTOX Laboratories,  Inc. at
December 31,  1995,  and for the year then ended,  incorporated  by reference in
EDITEK,  Inc.'s Annual  Report (Form 10-K) for the year ended  December 31, 1995
have been audited by Ernst & Young LLP,  independent  auditors,  and at December
31, 1994,  and for each of the two years in the period ended  December 31, 1994,
by KPMG Peat Marwick LLP, independent auditors, as set forth in their respective
reports  thereon  included  therein  and  incorporated herein by reference. Such
consolidated  financial  statements  are  incorporated  herein by  reference  in
reliance upon such reports given upon the authority of such firms as experts  in
accounting and auditing.


                                 LEGAL MATTERS
   
         Legal  matters in  connection  with the  issuance  of the Common  Stock
offered  hereby will be passed upon for the  Company by Petree  Stockton,  L.L.P
Raleigh,  North Carolina.  As of April 19, 1996,  attorneys at Petree  Stockton,
L.L.P. owned no shares of Common Stock of the Company.
    

                  INDEMNIFICATION AND LIMITATION OF LIABILITY

         The Bylaws of the Company  provide that the Company shall indemnify the
directors and officers of the Company  against  liability (and expenses  related
thereto)  arising out of their  status as  directors  and officers to the extent
permitted by law.  Additionally  certain  mandatory  indemnification  rights are
available  under the Delaware  General  Corporation Law ("DGCL") to officers and
directors to the extent they are  successful in the defense of any proceeding to
which they were a party by virtue of their position as a director or officer.

         Further,  as permitted by the DGCL, the Certificate of Incorporation of
the  Company  includes  a  provision  limiting  the  personal  liability  of its
directors for monetary damages for certain breaches of their duties as directors
to the extent  permitted under the DGCL. The Company also maintains a directors'
and officers' liability policy which insures such persons against claims arising
from  certain acts or decisions  by them in their  capacities  as directors  and
officers  of the  Company,  subject to certain  exclusions  and  deductible  and
maximum amounts.

         In addition to such other rights of indemnification as they may have as
directors or as members of a committee of directors,  the Company's  Amended and
Restated  Equity  Compensation  Plan  and  Amended  and  Restated  Stock

                                     28
<PAGE>

Option  Plan for  Non-Employee Directors provide for indemnification for certain
of the Company's directors  for  liabilities  arising in  connection  with their
actions taken as members of the committees administering such plans.

         Such  limitation  of  liability  pursuant  to state law does not affect
liability,  if any, arising under the federal securities laws. Further,  insofar
as  indemnification  for  liabilities  arising under the  Securities  Act may be
permitted to directors, officers and controlling persons of the Company pursuant
to contractual provisions or otherwise, the Company has been advised that in the
opinion of the  Securities  and Exchange  Commission,  such  indemnification  is
against  public  policy as expressed  in the  Securities  Act and is,  therefore
unenforceable.

                                     29
<PAGE>


                                  PROSPECTUS


                                  EDITEK, INC.

   
                                  April 25, 1996
    

                                 TABLE OF CONTENTS

                                                                         Page
   
Available Information.                                                     2
Incorporation of Certain Information by Reference                          2
Risk Factors                                                               3
Number of Shares of Common Stock                                          15
The Company                                                               19
Selling Shareholders                                                      22
Plan of Distribution                                                      26
Recent Developments                                                       26
Experts                                                                   27
Legal Matters                                                             28
Indemnification and Limitation of Liability                               28
    

         No person has been  authorized to give any  information  or to make any
representations other than those contained in this Prospectus in connection with
this offering,  and, if given or made, such information or representations  must
not be relied upon as having been  authorized  by the Company.  This  Prospectus
does not constitute an offer to sell, or a solicitation  of an offer to buy, any
securities other than the registered securities to which it relates, or an offer
to or  solicitation  of any  person in any  jurisdiction  in which such offer or
solicitation would be unlawful. The delivery of this Prospectus at any time does
not imply that  information  herein is correct as of any time  subsequent to its
date.

                                       30
<PAGE>


                                   EXHIBIT INDEX


Exhibit No.                                 Description

   
     5.1          Legal Opinion of Petree Stockton, L.L.P.
    

     23.1         Consent of Petree Stockton, L.L.P.
                  (Contained in Exhibit 5.1)

     23.2         Consent of Ernst & Young LLP

     23.3         Consent of KPMG Peat Marwick LLP


   
    

                                   31
<PAGE>


                                 PART II

                   INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

                  The estimated expenses of this Registration  Statement will be
paid by the Registrant and are as follows:

   
                  Registration Fee - Securities and
                    Exchange Commission                       $   13,962.28
                  Legal Fees                                      10,000.00
                  Accounting Fees and Expenses                     3,000.00
                  Miscellaneous                                    1,000.00
                                  Total                       $   27,962.28
    
Item 15. Indemnification of Directors and Officers.

                  Article  III,  Section  6,  of the  Bylaws  of the  Registrant
provides as follows:

                  The corporation  shall indemnify any person made a party to an
         action by or in the right of the  corporation  to procure a judgment in
         its favor by reason of the fact that he, his testator or intestate,  is
         or was a  director  or officer of the  corporation,  against  expenses,
         including attorneys fees,  actually and necessarily  incurred by him in
         connection  with the  defense of such action or in  connection  with an
         appeal therein, except in relation to matters as to which such director
         or officer is adjudged to be liable for negligence or misconduct in the
         performance of his duty to the corporation except as otherwise provided
         by law or in the Certificate of Incorporation  of the corporation.  The
         corporation  shall indemnify any person made or threatened to be made a
         party to an action or proceeding other than one of the type referred to
         in  the  foregoing,  whether  civil  or  criminal,  including,  without
         limitation, an action by or in the right of any other corporation which
         any  director or officer of the  corporation  served in any capacity at
         the  request  of the  corporation,  by reason of the fact that he,  his
         testator or intestate was a director or officer of the  corporation  or
         served  such other  corporation  in any  capacity,  against  judgments,
         fines,  amounts paid in settlement  and expenses,  including  attorneys
         fees,  actually and necessarily  incurred as a result of such action or
         proceeding or any appeal therein, if such director or officer acted, in
         good faith, for the purpose which he reasonably

                                      II-1
<PAGE>


         believed to be in the best interest of the corporation and, in criminal
         actions or proceedings, in addition, had no reasonable cause to believe
         that his conduct was  unlawful.  The  termination  of any such civil or
         criminal  action or proceeding by judgment,  settlement,  conviction or
         upon a plea of nolo contendere, or its equivalent,  shall not in itself
         create a  presumption  that any such director or officer did not act in
         good faith for a purpose which he reasonably believed to be in the best
         interest of the corporation or that he had reasonable  cause to believe
         that his conduct was unlawful.  Expenses  incurred in defending a civil
         or criminal  action or  proceeding  may be paid by the  corporation  in
         advance of the final  disposition  of such  action or  proceeding.  The
         foregoing right of indemnification shall not be deemed exclusive of any
         other rights to which those  indemnified may be entitled as a matter of
         law or any Bylaw,  agreement,  vote of  stockholders,  provision in the
         Certificate of Incorporation, or otherwise.

                  Reference  is made to  paragraph  8 of  Article  Sixth  of the
Registrant's  Certificate  of  Incorporation,  as  amended,  which  provides  as
follows:

                  8. A  director  of this  Corporation  shall not be  personally
         liable to the Corporation or its  stockholders for monetary damages for
         breach of fiduciary  duty as a director,  except for  liability (i) for
         any breach of the director's  duty of loyalty to the Corporation or its
         stockholders,  (ii) for acts or  omissions  not in good  faith or which
         involve  intentional  misconduct or a knowing  violation of law,  (iii)
         under Section 174 of the Delaware General  Corporation Law, or (iv) for
         any transaction  from which the director  derived an improper  personal
         benefit.

                  Reference  is  also  made  to  Section  145  of Title 8 of the
Delaware  Code,  which provides as follows:

                  (a) A  corporation  may  indemnify  any person who was or is a
         party or is threatened to be made a party to any threatened, pending or
         completed  action,  suit  or  proceeding,   whether  civil,   criminal,
         administrative  or  investigative  (other  than an  action by or in the
         right of the  corporation)  by  reason  of the fact that he is or was a
         director,  officer, employee or agent of the corporation,  or is or was
         serving  at the  request of the  corporation  as a  director,  officer,
         employee or agent of another corporation,  partnership,  joint venture,
         trust or  other  enterprise,  against  expenses  (including  attorneys'
         fees),  judgments,  fines and amounts paid in  settlement  actually and
         reasonably  incurred by him in  connection  with such  action,  suit or
         proceeding  if he acted in good  faith  and in a manner  he  reasonably
         believed  to be in  or  not  opposed  to  the  best  interests  of  the
         corporation, and, with respect to any criminal action

                                        II-2
<PAGE>


         or  proceeding,  had no  reasonable  cause to believe  his  conduct was
         unlawful.  The  termination  of  any  action,  suit  or  proceeding  by
         judgment,  order,  settlement,  conviction,  or  upon  a plea  of  nolo
         contendere  or  its  equivalent,   shall  not,  of  itself,   create  a
         presumption  that the  person did not act in good faith and in a manner
         which  he  reasonably  believed  to be in or not  opposed  to the  best
         interests of the corporation,  and, with respect to any criminal action
         or  proceeding,  had  reasonable  cause to believe that his conduct was
         unlawful.

                           (b) A corporation may indemnify any person who was or
         is a party  or is  threatened  to be made a  party  to any  threatened,
         pending  or  completed  action  or  suit  by or in  the  right  of  the
         corporation  to procure a  judgment  in its favor by reason of the fact
         that  he is or  was a  director,  officer,  employee  or  agent  of the
         corporation,  or is or was serving at the request of the corporation as
         a  director,   officer,  employee  or  agent  of  another  corporation,
         partnership,  joint venture, trust or other enterprise against expenses
         (including  attorneys' fees) actually and reasonably incurred by him in
         connection  with the defense or settlement of such action or suit if he
         acted in good faith and in a manner he reasonably  believed to be in or
         not opposed to the best interests of the corporation and except that no
         indemnification  shall be made in respect of any claim, issue or matter
         as to which such  person  shall have been  adjudged to be liable to the
         corporation unless and only to the extent that the Court of Chancery or
         the court in which such action or suit was brought shall determine upon
         application that,  despite the adjudication of liability but in view of
         all the circumstances of the case, such person is fairly and reasonably
         entitled to indemnity for such expenses  which the Court of Chancery or
         such other court shall deem proper.

                  (c) To the extent that a director,  officer, employee or agent
         of a  corporation  has been  successful  on the merits or  otherwise in
         defense of any action,  suit or proceeding  referred to in  subsections
         (a) and (b) of this  section,  or in  defense  of any  claim,  issue or
         matter therein,  he shall be indemnified  against  expenses  (including
         attorneys' fees) actually and reasonably  incurred by him in connection
         therewith.

                  (d) Any indemnification  under subsections (a) and (b) of this
         section  (unless  ordered by a court) shall be made by the  corporation
         only as  authorized  in the  specific  case upon a  determination  that
         indemnification of the director,  officer,  employee or agent is proper
         in the  circumstances  because he has met the  applicable  standard  of
         conduct set forth in subsections (a) and (b) of this section.

                                        II-3
<PAGE>


                  (e)  Expenses  (including  attorneys'  fees)  incurred  by any
         officer or director in defending any civil, criminal, administrative or
         investigative action, suit or proceeding may be paid by the corporation
         in advance of the final disposition of such action,  suit or proceeding
         upon  receipt of an  undertaking  by or on behalf of such  director  or
         officer to repay such amount if it shall  ultimately be determined that
         he is not entitled to be indemnified  by the  corporation as authorized
         in this section.  Such expenses (including attorney's fees) incurred by
         other  employees  and  agents  may  be so  paid  upon  such  terms  and
         conditions, if any, as the board of directors deems appropriate.

                  (f) The  indemnification  and advancement of expenses provided
         by, or granted pursuant to, the other subsections of this section shall
         not be deemed  exclusive  of any other  rights to which  those  seeking
         indemnification  or  advancement  of expenses may be entitled under any
         bylaw,  agreement,  vote of stockholders or disinterested  directors or
         otherwise,  both as to action in his official capacity and as to action
         in another capacity while holding such office.

                  (g) A  corporation  shall have power to purchase  and maintain
         insurance  on behalf of any person who is or was a  director,  officer,
         employee  or  agent of the  corporation,  or is or was  serving  at the
         request of the corporation as a director, officer, employee or agent of
         another  corporation,   partnership,  joint  venture,  trust  or  other
         enterprise  against any liability  asserted against him and incurred by
         him in any such capacity, or arising out of his status as such, whether
         or not the  corporation  would have the power to indemnify  him against
         such liability under this section.

                  (h)  For  purposes  of  this   section,   references  to  "the
         corporation" shall include,  in addition to the resulting  corporation,
         any   constituent   corporation   (including   any   constituent  of  a
         constituent)  absorbed  in a  consolidation  or  merger  which,  if its
         separate existence had continued, would have had power and authority to
         indemnify its directors, officers, and employees or agents, so that any
         person who is or was a  director,  officer,  employee  or agent of such
         constituent  corporation,  or is or was  serving at the request of such
         constituent  corporation as a director,  officer,  employee or agent of
         another  corporation,   partnership,  joint  venture,  trust  or  other
         enterprise,  shall stand in the same  position  under this section with
         respect to the resulting or surviving corporation as he would have with
         respect to such constituent  corporation if its separate  existence had
         continued.

                                       	II-4
<PAGE>


                  (i)  For  purposes  of  this  section,  references  to  "other
         enterprises"  shall  include  employee  benefit  plans;  references  to
         "fines"  shall  include  any excise  taxes  assessed  on a person  with
         respect to any employee benefit plan; and references to "serving at the
         request of the  corporation"  shall  include any service as a director,
         officer,  employee or agent of the corporation which imposes duties on,
         or involves  services by, such director,  officer,  employee,  or agent
         with  respect  to  an  employee   benefit  plan,  its  participants  or
         beneficiaries;  and a person who acted in good faith and in a manner he
         reasonably  believed  to be in the  interest  of the  participants  and
         beneficiaries of an employee benefit plan shall be deemed to have acted
         in a manner "not opposed to the best interests of the  corporation"  as
         referred to in this section.

                  (j) The  indemnification  and advancement of expenses provided
         by, or granted  pursuant  to,  this  section  shall,  unless  otherwise
         provided when  authorized or ratified,  continue as to a person who has
         ceased to be a director,  officer, employee or agent and shall inure to
         the  benefit  of the  heirs,  executors  and  administrators  of such a
         person.

                  (k) The Court of  Chancery  is hereby  vested  with  exclusive
         jurisdiction  to hear and  determine  all  actions for  advancement  of
         expenses or  indemnification  brought  under this  section or under any
         bylaw, agreement,  vote of stockholders or disinterested  directors, or
         otherwise.   The  Court  of   Chancery   may   summarily   determine  a
         corporation's  obligation  to  advance  expenses  (including  attorneys
         fees).

         In actions other than those brought by or on behalf of the Company, the
Company may indemnify its  directors,  officers,  employees and other agents for
expenses (including attorneys fees),  judgments,  fines and settlements incurred
by such  persons,  provided  that the person  seeking  indemnification  acted in
accordance  with  a  statutory  of  good  faith  conduct.   In  actions  brought
derivatively on behalf of the Company  ("derivative  actions") or by the Company
itself,  the Company may indemnify such  individuals  for expenses  actually and
reasonably  incurred and not for judgments,  fines or settlements.  Such limited
indemnification is not permitted in any derivative or direct action as to issues
or claims for which the officer or director is held liable to the Company unless
the Court  determines  that,  in view of all the  circumstances,  the  person is
fairly and reasonably  entitled to indemnity for such expenses.  The Company may
advance expenses incurred by any person entitled to indemnification in defending
a proceeding,  provided that, if such advance is made to an officer or director,
such person provides an undertaking to the Company to repay all amounts advanced
if  it  is  ultimately  determined  that  the  person  is  not  entitled  to  be
indemnified.

                                   II-5
<PAGE>


         In addition to such other rights of indemnification as they may have as
directors or as members of a committee of directors,  the Company's  Amended and
Restate Equity  Compensation  Plan and Amended and Restated Stock OptionPlan for
Non-Employee  Directors provide for indemnification for certain of the Company's
directors  for  liabilities  arising in  connection  with their actions taken as
members of the committees administering such plans.

         Further,  the Company  maintains a directors'  and officers'  liability
policy which insures such persons  against  claims  arising from certain acts or
decisions by them in their  capacities as directors and officers of the Company,
subject to certain exclusions and deductible and maximum amounts.

                                    II-6
<PAGE>


Item 16.  Exhibits

   
                   5.1     Legal Opinion of Petree Stockton, L.L.P.
    

                  23.1     Consent of Petree Stockton, L.L.P.
                           (Contained in Exhibit 5.1)

                  23.2     Consent of Ernst & Young LLP

                  23.3     Consent of KPMG Peat Marwick LLP

   
    


Item 17.  Undertakings.

                  (a)      The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
being made, a post-effective amendment to this Registration Statement;

                           (i) To include  any  prospectus  required  by Section
10(a)(3) of the Securities Act of 1933;

                           (ii) To reflect in the Prospectus any facts or events
arising after the  effective  date  of  the   Registration   Statement  (or  the
most  recent post-effective  amendment  thereof)  which, individually  or in the
aggregate,  represent a fundamental  change in the information set forth  in the
Registration Statement; and

                           (iii) To   include   any  material  information  with
respect to the plan of distribution not previously disclosed in the Registration
Statement  or  any  material  change  to such  information  in  the Registration
Statement;

                           Provided,  however,  that  paragraphs  (a)(1)(i)  and
(a)(1)(ii) do  not  apply  if  the  Registration  Statement  is on  Form  S-3 or
Form  S-8,  and  the information  required  to be  included in a  post-effective
amendment  by  those paragraphs is contained  in periodic  reports filed  by the
Registrant  pursuant to section  13 or section 15(d) of the Securities  Exchange
Act of 1934 that are incorporated by reference in the Registration Statement.

                                    II-7
<PAGE>


                  (2) That, for the purpose of determining  any liability  under
the Securities Act of 1933, each such  post-effective  amendment shall be deemed
to be a new registration  statement  relating to the securities offered therein,
and the  offering  of such  securities  at that  time  shall be deemed to be the
initial bona fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
amendment  any of the  securities  being  registered  which remain unsold at the
termination of the offering.

         (b) The undersigned  registrant hereby undertakes that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual  report  pursuant to section  13(a) or section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities  offered herein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

         (c)  Insofar  as  indemnification  for  liabilities  arising  under the
Securities Act of 1933 may be permitted to directors,  officers and  controlling
persons of the registrant  pursuant to the foregoing  provisions,  or otherwise,
the  registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Act and is,  therefore,  unenforceable.  In the  event  that a claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

                                  II-8
<PAGE>



                                SIGNATURES

   
Pursuant  to the  requirements  of  the  Securities  Act of 1933, the Registrant
certifies  that it has  reasonable  grounds  to believe that it meets all of the
requirements for  filing on Form S-3  and  has  duly  caused  this  Registration
Statement  to  be  signed  on  its  behalf by the  undersigned,  thereunto  duly
authorized,   in   the   City  of  Burlington,   State  of  North  Carolina,  on
April 24, 1996.
    
                                             EDITEK, INC.

                                             By: /s/ James D. Skinner
                                             James D. Skinner
                                             President,
                                             Principal Executive Officer and
                                             Chairman of the Board


Pursuant to  the  requirements  of the Securities Act of 1933, this Registration
Statement has been signed  by  the following  persons in  the capacities  and on
the dates indicated.

       Signature                   Title                       Date
   
/s/ James D. Skinner           President,                   April 24, 1996
James D. Skinner               Principal Executive
                               Officer, and
                               Chairman of the Board

/s/ Samuel C. Powell           Director                     April 24, 1996
Samuel C. Powell, Ph.D.

/s/ Peter J. Heath             Vice President of            April 24, 1996
Peter J. Heath                 Finance and Chief
                               Financial Officer, and
                               Principal Accounting
                               Officer

/s/ Gene E. Lewis *            Director                     April 24, 1996
Gene E. Lewis

/s/ Robert J. Beckman *        Director                     April 24, 1996
Robert J. Beckman

/s/ Harry G. McCoy, Pharm.D.   Director                     April 24, 1996
Harry G. McCoy, Pharm.D.

/s/ George W. Masters *        Director                     April 24, 1996
George W. Masters
    
* Executed on behalf of these persons by Peter J. Heath, duly approved
Attorney-In-Fact of each such person.

/s/ Peter J. Heath
Peter J. Heath
Attorney-In-Fact

                                   II-10

<PAGE>




   

                             PETREE STOCKTON, L.L.P.
                                ATTORNEYS AT LAW
                        4101 LAKE BOONE TRAIL, SUITE 400
                       RALEIGH, NORTH CAROLINA 27607-6519
                            TELEPHONE (919) 420-1700
                              FAX (919) 420-1800            OTHER OFFICES
                                                           CHARLOTTE, N. C.
                                                         WINSTON-SALEM, N. C.




    
   
                                 April 25, 1996
    






EDITEK, Inc.
1238 Anthony Road
Burlington, North Carolina  27215

Dear Gentlemen:
   
    We refer  to the  Registration  Statement  on Form  S-3,  No.  333-827  (the
"Registration  Statement")  filed  by  EDITEK,  Inc.  (the  "Company")  with the
Securities and Exchange Commission (the "Commission") on February 9, 1996, under
the Securities Act of 1933, as amended, and Amendment No. 1 thereto,  filed with
the  Commission on or about March 27, 1996,  and Amendment No. 2 thereto,  filed
with the Commission on or about April 25, 1996,  (the  "Amendment")  relating to
the proposed  public  offering of an aggregate  of  11,798,193  shares of Common
Stock,  par value $.15 per share (the "Shares"),  of which (1) 2,752,601  Shares
(the  "Outstanding  Shares") are currently  issued and  outstanding  on the date
hereof;  (2)  1,873,873  Shares (the  "Conversion  Shares")  are issuable in the
future pursuant to conversion rights of certain issued and outstanding shares of
Series  A  Convertible  Preferred  Stock  of the  Company  as set  forth  in the
Company's  Amended and Restated  Certificate of  Designations of Preferred Stock
filed with the Delaware Secretary of State on January 29, 1996 (the "Certificate
of  Designations"),  as described  in the  Registration  Statement;  (3) 906,667
Shares (the "Warrant  Shares") are issuable in the future  pursuant to the terms
of a warrant agreements (collectively the "Warrant Agreements"), as described in
the  Registration  Statement;  and (4) 6,265,052  Shares (the "Price  Protection
Shares") are issuable in the future  pursuant to the terms of an asset  purchase
agreement by and between the Company and MedTox Laboratories,  Inc. (the "MedTox
Agreement"),  pursuant  to the  conversion  rights of the  Series A  Convertible
Preferred  Stock set forth in the Certificate of  Designations,  and pursuant to
the terms of letter agreements  between the Company and certain security holders
of the Company (the  "Letter  Agreements"),  as  described  in the  Registration
Statement.

    As counsel for the Company,  we have examined such corporate records,  other
documents,  and  such  questions  of  law as we  have  considered  necessary  or
appropriate  for  the  purposes  of  this  opinion.   Upon  the  basis  of  that
examination, we advise you that, in our opinion, (1) the Outstanding Shares have
been duly  authorized,  validly  issued  and  delivered  and are fully  paid and
nonassessable  and (2) subject to the  availability  of authorized  but unissued
shares of Common  Stock  pursuant to the  Certificate  of  Incorporation  of the
Company (a) the Conversion Shares have been duly authorized, and when issued and
delivered in accordance with the terms of the  Certificate of  Designations  and
the Certificate of Incorporation of the Company,  will be validly issued,  fully
paid and  nonassessable,  (b) the 

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EDITEK, Inc.
April 25, 1996
Page 2

Warrant Shares have been duly  authorized,  and when issued,  delivered and paid
for in accordance  with the terms of the Warrant  Agreements and the Certificate
of  Incorporation  of the  Company  will  be  validly  issued,  fully  paid  and
nonassessable,  and (c) the Price  Protection  Shares have been duly authorized,
and when  issued  and  delivered  in  accordance  with the  terms of the  MedTox
Agreement,  the Certificate of  Designations,  the Certificate of  Incorporation
and/or  the  Letter  Agreements,   will  be  validly  issued,   fully  paid  and
nonassessable.

    We  hereby  consent  to the  filing of this  opinion  as an  exhibit  to the
Registration  Statement  and  to  the  reference  to our  name  in  the  related
Prospectus  under  the  caption  "Legal  Matters."  This  consent  is  not to be
construed as an admission  that we are a person whose  consent is required to be
filed with the Registration Statement under the provisions of the Securities Act
of 1933, as amended.

                                Very truly yours,

    



                                                             Exhibit 23.1


                     Consent of Independent Auditors
   
We  consent to  the  reference to  our  firm under  the caption "Experts" in the
Registration  Statement  Amendment  No.  2  (Form S-3 No. 333-827)  and  related
Prospectus  of  EDITEK, Inc. for  the registration  of 11,798,193  shares of its
common  stock and to the  incorporation by reference therein of our report dated
February 23, 1996, with  respect to  the  consolidated financial  statements and
schedule  of EDITEK, Inc. and of our report dated March 6, 1996 with respect to
the consolidated financial statements of MEDTOX Laboratories, Inc. included in
its Annual Report (Form 10-K) for the year ended December 31, 1995, filed with
the  Securities and  Exchange Commission.
    

                                                       Ernst & Young LLP


Raleigh, North Carolina
April 24, 1996

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                                                             Exhibit 23.2

The Board of Directors
EDITEK, Inc.


We  consent  to the  incorporation by  reference in the  registration  statement
(No. 333-827) on  Form S-3 of EDITEK, Inc. of our report dated January 31, 1995,
with  respect to the consolidated balance sheet of Medtox Laboratories, Inc. and
subsidiary as of  December 31, 1994, and  the related consolidated statements of
operations,  stockholders' equity, and  cash flows for  each of the years in the
two-year  period ended December 31, 1994, which  report appears in the Form 10-K
of  EDITEK, Inc. dated April 1, 1996. We also  consent to the  reference to our
firm under the heading "Experts" in the prospectus.


                                                      KPMG Peat Marwick LLP

Minneapolis, Minnesota
   
April 24, 1996
    

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