<ARTICLE>             5

<LEGEND>
Exhibit 27
                             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 Sheets at March 31, 2000 and the Consolidated  Statement of
Earnings  for the twelve  months  ended March 31, 2000 and is  qualified  in its
entirety by reference to such financial statements.


<CIK>                         0000069499
<NAME>                        Exhibit 27
<MULTIPLIER>                  1,000

                                 
<PERIOD-TYPE>                          12-MOS
<FISCAL-YEAR-END>                     MAR-31-2000

<PERIOD-END>                          MAR-31-2000

<CASH>                                203,493
<SECURITIES>                           99,557
<RECEIVABLES>                         274,973
<ALLOWANCES>                           77,212
<INVENTORY>                           145,869
<CURRENT-ASSETS>                      686,746
<PP&E>                                273,581
<DEPRECIATION>                        105,581
<TOTAL-ASSETS>                      1,341,230
<CURRENT-LIABILITIES>                  87,770
<BONDS>                                25,104
<PREFERRED-MANDATORY>                       0
<PREFERRED>                                 0
<COMMON>                               65,139
<OTHER-SE>                          1,138,583
<TOTAL-LIABILITY-AND-EQUITY>        1,341,230
<SALES>                               790,145
<TOTAL-REVENUES>                      790,145
<CGS>                                 361,818
<TOTAL-COSTS>                         361,818
<OTHER-EXPENSES>                      205,368
<LOSS-PROVISION>                        2,035
<INTEREST-EXPENSE>                        390
<INCOME-PRETAX>                       242,743
<INCOME-TAX>                           88,497
<INCOME-CONTINUING>                   154,246
<DISCONTINUED>                              0
<EXTRAORDINARY>                             0
<CHANGES>                                   0
<NET-INCOME>                          154,246
<EPS-BASIC>                            1.19
<EPS-DILUTED>                            1.18