<ARTICLE>                     5

<LEGEND>


                                      Financial Data Schedule
                              Mylan Laboratories Inc. and Subsidiaries
                                    Article 5 of Regulation S-X

The  schedule  contains  summary  financial   information   extracted  from  the
Consolidated  Balance Sheet at June 30, 1999 and the  Consolidated  Statement of
Earnings  for the three  months  ended  June 30,  1999 and is  qualified  in its
entirety by reference to such financial statements.

</LEGEND>

<CIK>                         0000069499
<NAME>                        none


                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>               MAR-31-2000

<PERIOD-END>                    JUN-30-1999

<CASH>                             201,798
<SECURITIES>                        87,639
<RECEIVABLES>                      205,251
<ALLOWANCES>                        54,027
<INVENTORY>                        138,278
<CURRENT-ASSETS>                   616,253
<PP&E>                             250,229
<DEPRECIATION>                      93,863
<TOTAL-ASSETS>                   1,241,106
<CURRENT-LIABILITIES>              105,458
<BONDS>                             24,771
<PREFERRED-MANDATORY>                    0
<PREFERRED>                              0
<COMMON>                            65,020
<OTHER-SE>                       1,023,092
<TOTAL-LIABILITY-AND-EQUITY>     1,241,106
<SALES>                            177,095
<TOTAL-REVENUES>                   177,095
<CGS>                               80,848
<TOTAL-COSTS>                       80,848
<OTHER-EXPENSES>                    49,905
<LOSS-PROVISION>                    10,443
<INTEREST-EXPENSE>                     174
<INCOME-PRETAX>                     50,119
<INCOME-TAX>                        18,166
<INCOME-CONTINUING>                 31,953
<DISCONTINUED>                           0
<EXTRAORDINARY>                          0
<CHANGES>                                0
<NET-INCOME>                        31,953
<EPS-BASIC>                          .25
<EPS-DILUTED>                          .25