<TABLE> <S> <C>
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<LEGEND>
The schedule contains summary financial information extracted from Kos
Pharmaceuticals, Inc.'s Form 10-Q for the quarterly period ended
September 30, 2000, and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
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<S> <C>
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<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JUL-01-2000
<PERIOD-END> SEP-30-2000
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0
0
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</TABLE>