PHARMACYCLICS INC
SC 13G, 1999-03-16
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G
                                 (Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS  FILED PURSUANT TO RULES 13d-1(b),  (c)
AND (d) AND AMENDMENTS  THERETO FILED PURSUANT TO RULE 13d-2(b)
                               (Amendment No.__)*

                               PHARMACYCLICS INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   716933 10 6
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                                  March 9, 1999
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

         Check the  appropriate box to designate the rule pursuant to which this
Schedule is filed:

         [   ]   Rule 13d-1(b)
         [ X ]   Rule 13d-1(c)
         [   ]   Rule 13d-1(d)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

         The information  required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).

                         (Continued on following pages)

                               Page 1 of 20 Pages

                       Exhibit Index Contained on Page 17


<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 2 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Management II, L.P. ("ICM2")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       78,394 shares, which are directly owned by Integral Capital
                SHARES                                     Partners International II, C.V. ("ICPI2").   ICM2 is the
             BENEFICIALLY                                  investment general partner of ICPI2.
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           78,394   shares  (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                               78,394 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              0.6%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 3 of  20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Management III, L.P. ("ICM3")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       356,440 shares, of which 290,285 shares are directly owned by
                SHARES                                     Integral Capital Partners III, L.P. ("ICP3") and 66,155 shares
             BENEFICIALLY                                  are directly owned by Integral Capital Partners International
            OWNED BY EACH                                  III, L.P. ("ICPI3"). ICM3 is the general partner of ICP3 and the
              REPORTING                                    investment general partner of ICPI3.
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           356,440  shares  (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                              356,440 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              2.9%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 4 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Management IV, LLC ("ICM4")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP  OR PLACE  OF  ORGANIZATION
                     Delaware  (limited liability company)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       363,350 shares which are directly owned by Integral Capital
                SHARES                                     Partners IV, L.P. ("ICP4").  ICM4 is the general partner of ICP4.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           363,350 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                              363,350 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              2.9%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      OO
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 5 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     ICP MS Management, LLC ("ICP Management")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP  OR PLACE  OF  ORGANIZATION
                     Delaware  (limited liability company)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       1,750 shares which are directly owned by Integral Capital
                SHARES                                     Partners IV MS Side Fund, L.P. ("Side Fund").  ICP Management is
             BENEFICIALLY                                  the general partner of Side Fund.
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           1,750 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                                1,750 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                             0.01%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      OO
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 6 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners International II C.V. ("ICPI2")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Netherlands  Antilles (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       78,394 shares are directly owned by ICPI2.  Integral Capital
                SHARES                                     Management II, L.P. is the investment general partner of ICPI2.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           78,394   shares  (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                               78,394 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              0.6%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 7 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners III, L.P. ("ICP3")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       290,285 shares are directly owned by ICP3.  Integral Capital
                SHARES                                     Management III, L.P. is the general partner of ICP3.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           290,285  shares  (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                              290,285 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*


                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              2.3%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 8 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners International III, L.P. ("ICPI3")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP  OR  PLACE  OF   ORGANIZATION
                     Cayman  Islands (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       66,155 shares are directly owned by ICPI3.  Integral Capital
                SHARES                                     Management III, L.P. is the investment general partner of ICPI3.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           66,155   shares  (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                               66,155 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              0.5%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 9 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners IV, L.P. ("ICP4")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       363,350 shares are directly owned by ICP4. Integral Capital
                SHARES                                     Management IV, LLC is the general partner of ICP4.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           363,350  shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                             363,350  shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                              2.9%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>     
CUSIP NO. 716933 10 6                                            13G        Page 10 of 20 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners IV MS Side Fund, L.P. ("Side Fund")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                                    (a)   [ ]     (b )   [X]

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       1,750  shares are directly owned by Side Fund. ICP MS
                SHARES                                     Management, LLC is the general partner of Side Fund.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           1,750 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                                                1,750 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*

                                                                                                                           [ ]

- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                                             0.01%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                                                      PN
- ----------- ------------------------------------------------------------------------------------------------------------------

<FN>
                                        *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>

                                                                   Page 11 of 20

ITEM 1(a).        NAME OF ISSUER:

                  Pharmacyclics, Inc.

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                  995 East Arques Avenue
                  Sunnyvale, CA  94086

ITEM 2(a), (b), (c). NAME OF PERSON FILING, ADDRESS OF PRINCIPAL BUSINESS OFFICE
                     OR, IF NONE, RESIDENCE, AND CITIZENSHIP:

                  This statement is being filed by Integral  Capital  Management
II, L.P., a Delaware limited partnership,  ("ICM2"), Integral Capital Management
III, L.P., a Delaware limited partnership ("ICM3"),  Integral Capital Management
IV, LLC, a Delaware limited liability  company ("ICM4"),  and ICP MS Management,
LLC, a Delaware  limited  liability  company "(ICP  Management").  The principal
business  address of ICM2, ICM3, ICM4 and ICP Management is 2750 Sand Hill Road,
Menlo Park, California 94025.

                  ICM2 is the  investment  general  partner of Integral  Capital
Partners  International  II, C.V., a Netherlands  Antilles  limited  partnership
("ICPI2"). ICM3 is the general partner of Integral Capital Partners III, L.P., a
Delaware limited  partnership  ("ICP3"),  and the investment  general partner of
Integral  Capital  Partners  International  III, L.P., a Cayman Islands exempted
limited partnership  ("ICPI3").  ICM4 is the general partner of Integral Capital
Partners IV, L.P., a Delaware limited  partnership  ("ICP4").  ICP Management is
the  general  partner of Integral  Capital  Partners  IV MS Side Fund,  L.P.,  a
Delaware limited partnership ("Side Fund"). With respect to ICM2, ICM3, ICM4 and
ICP Management,  this statement relates only to ICM2's,  ICM3's,  ICM4's and ICP
Management's  indirect,  beneficial  ownership  of shares of Common Stock of the
Issuer (the  "Shares").  The Shares have been purchased by ICPI2,  ICP3,  ICPI3,
ICP4 and Side Fund, and none of ICM2, ICM3, ICM4 or ICP Management,  directly or
otherwise  hold any Shares.  Management of the business  affairs of ICM2,  ICM3,
ICM4 and ICP  Management,  including  decisions  respecting  disposition  and/or
voting of the Shares,  resides in a majority of the general partners or managers
of ICM2,  ICM3,  ICM 4 and ICP  Management,  respectively  such  that no  single
general  partner or manager of ICM2,  ICM3,  ICM4 or ICP  Management  has voting
and/or dispositive power of the Shares.

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:

                  Common Stock

ITEM 2(e).        CUSIP NUMBER:

                  716933 10 6

<PAGE>

                                                                   Page 12 of 20

<TABLE>
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), or 13d-2(b) or (c), CHECK WHETHER THE PERSON FILING
        IS A:
<CAPTION>

<S>      <C>      <C>      <C>     
         (a)      [    ]   Broker or dealer registered under Section 15 of the Exchange Act.
         (b)      [    ]   Bank as defined in Section 3(a)(6) of the Exchange Act.
         (c)      [    ]   Insurance company as defined in Section 3(a)(19) of the Exchange Act.
         (d)      [    ]   Investment company registered under Section 8 of the Investment Company Act.
         (e)      [    ]   An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
         (f)      [    ]   An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
         (g)      [    ]   A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
         (h)      [    ]   A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
         (i)      [    ]   A church plan that is excluded from the definition of an investment company under
                           Section 3(c)(14) of the Investment Company Act;
         (j)      [    ]   Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

         If this statement is filed pursuant to Rule 13d-1(c), check this box.  [ X ].

ITEM 4.  OWNERSHIP.

         Provide  the  following  information  regarding  the  aggregate  number  and  percentage  of the class of
securities of the issuer identified in Item 1.

         A.       Integral Capital Management II, L.P. ("ICM2")

                  (a)      Amount Beneficially Owned:  78,394
                  (b)      Percent of Class: 0.6%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote:  78,394
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 78,394

         B.       Integral Capital Management III, L.P. ("ICM3")

                  (b)      Amount Beneficially Owned:  356,440
                  (b)      Percent of Class: 2.9%
                  (c)      Number of shares as to which such person has:
                           4.    Sole power to vote or to direct vote:  -0-
                           5.    Shared power to vote or to direct vote:  356,440
                           6.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 356,440

<PAGE>


                                                                   Page 13 of 20


         C.       Integral Capital Management IV, LLC ("ICM4")

                  (a)      Amount Beneficially Owned:  363,350
                  (b)      Percent of Class: 2.9%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 363,350
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 363,350

         D.       ICP MS Management, LLC ("ICP Management")

                  (a)      Amount Beneficially Owned:  1,750
                  (b)      Percent of Class: 0.01%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 1,750
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 1,750

         E.       Integral Capital Partners International II C.V. ("ICPI2")

                  (a)      Amount Beneficially Owned:  78,394
                  (b)      Percent of Class: 0.6%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 78,394
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 78,394

         F.       Integral Capital Partners III, L.P. ("ICP3")

                  (a)      Amount Beneficially Owned:  290,285
                  (b)      Percent of Class:  2.3%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 290,285
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 290,285

         G.       Integral Capital Partners International III, L.P. ("ICPI3")

                  (a)      Amount Beneficially Owned:  66,155
                  (b)      Percent of Class: 0.5%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 66,155
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 66,155


<PAGE>

                                                                  Page 14 of  20

         H.       Integral Capital Partners IV, L.P. ("ICP4") 

                  (a)      Amount Beneficially Owned:  363,350
                  (b)      Percent of Class: 2.9%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 363,350
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 363,350

         I.       Integral Capital Partners IV MS Side Fund, L.P. ("Side Fund") 

                  (a)      Amount Beneficially Owned:  1,750
                  (b)      Percent of Class: 0.01%
                  (c)      Number of shares as to which such person has:
                           1.    Sole power to vote or to direct vote:  -0-
                           2.    Shared power to vote or to direct vote: 1,750
                           3.    Sole power to dispose or to direct the disposition:  -0-
                           4.    Shared power to dispose or to direct the disposition: 1,750
</TABLE>

ITEM 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

                  If this statement is being filed to report the fact that as of
the date hereof the reporting  person has ceased to be the  beneficial  owner of
more than five percent of the class of securities, check the following [ ].

ITEM 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

         Not applicable.

ITEM 7.  IDENTIFICATION  AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
         SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

         Not applicable.

ITEM 8.  IDENTIFICATION AND CLASSIFCATION OF MEMBERS OF THE GROUP.

         Not applicable.

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP.

         Not applicable.

<PAGE>


                                                                  Page 15 of  20

ITEM 10. CERTIFICATION.

                  By signing  below I certify  that, to the best of my knowledge
and belief, the securities  referred to above were not acquired and are not held
for the purpose of or with the effect of changing or influencing  the control of
the  issuer  of the  securities  and  were  not  acquired  and are  not  held in
connection  with or as a participant in any  transaction  having that purpose or
effect.

                                    SIGNATURE
                                    ---------

                  After  reasonable  inquiry and to the best of my knowledge and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

Dated:  March 16, 1999
                                 INTEGRAL CAPITAL MANAGEMENT II, L.P.


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner

                                 INTEGRAL CAPITAL MANAGEMENT III, L.P.


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner

                                 INTEGRAL CAPITAL MANAGEMENT IV, LLC


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager

                                 ICP MS MANAGEMENT IV, LLC


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager

                                 INTEGRAL CAPITAL PARTNERS INTERNATIONAL II C.V.

                                 By Integral Capital Management II, L.P.,
                                 its Investment General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


<PAGE>


                                                                   Page 16 of 20


                                 INTEGRAL CAPITAL PARTNERS III, L.P.

                                 By Integral Capital Management III, L.P.,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


                                 INTEGRAL CAPITAL PARTNERS INTERNATIONAL
                                 III, L.P.

                                 By Integral Capital Management III, L.P.,
                                 its Investment General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


                                 INTEGRAL CAPITAL PARTNERS IV, L.P.

                                 By Integral Capital Management IV, LLC,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager

                                 INTEGRAL CAPITAL PARTNERS IV MS SIDE FUND,
                                 L.P.

                                 By ICP MS Management, LLC,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager


<PAGE>


                                                                   Page 17 of 20


                                  EXHIBIT INDEX
                                  -------------


                                                                 Found on
                                                                 Sequentially
Exhibit                                                          Numbered Page
- -------                                                          -------------

Exhibit A:        Agreement of Joint Filing                           18


<PAGE>


                                                                   Page 18 of 20

                                    EXHIBIT A
                                    ---------

                            Agreement of Joint Filing
                            -------------------------

                  The  undersigned  hereby  agree that they are  filing  jointly
pursuant  to Rule  13d-1(k)(1)  of the Act the  statement  dated  March 16, 1999
containing the  information  required by Schedule 13G, for the 799,934 Shares of
capital  stock  of  Pharmacyclics,   Inc.  held  by  Integral  Capital  Partners
International  II C.V., a Netherlands  Antilles  limited  partnership,  Integral
Capital  Partners III, L.P., a Delaware  limited  partnership,  Integral Capital
Partners International III, L.P., a Cayman Islands exempted limited partnership,
Integral Capital Partners IV, L.P., a Delaware limited partnership, and Integral
Capital Partners IV MS Side Fund, L.P., a Delaware limited partnership.

Date:  March 16, 1999
                                 INTEGRAL CAPITAL MANAGEMENT II, L.P.


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner

                                 INTEGRAL CAPITAL MANAGEMENT III, L.P.


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner

                                 INTEGRAL CAPITAL MANAGEMENT IV, LLC


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager

                                 ICP MS MANAGEMENT IV, LLC


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager


<PAGE>


                                                                   Page 19 of 20

                                 INTEGRAL CAPITAL PARTNERS INTERNATIONAL II C.V.

                                 By Integral Capital Management II, L.P.,
                                 its Investment General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


                                 INTEGRAL CAPITAL PARTNERS III, L.P.

                                 By Integral Capital Management III, L.P.,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


                                 INTEGRAL CAPITAL PARTNERS INTERNATIONAL
                                 III, L.P.

                                 By Integral Capital Management III, L.P.,
                                 its Investment General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a General Partner


                                 INTEGRAL CAPITAL PARTNERS IV, L.P.

                                 By Integral Capital Management IV, LLC,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager


<PAGE>


                                                                   Page 20 of 20

                                 INTEGRAL CAPITAL PARTNERS IV MS SIDE FUND,
                                 L.P.

                                 By ICP MS Management, LLC,
                                 its General Partner


                                 By         /s/ Pamela K. Hagenah
                                   ----------------------------------
                                            Pamela K. Hagenah
                                            a Manager



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