EXHIBIT 99.3

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. Section 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Dr. Reddy's Laboratories Limited (the
"Company") on Form 20-F for the period ended March 31, 2004 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, G. V.
Prasad, Chief Executive Officer of the Company, hereby certify, pursuant to 18
U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

1.    The Report fully complies with the requirements of Section 13(a) or 15(d)
      of the Securities Exchange Act of 1934; and

2.    The information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the
      Company.

Date: September 30, 2004

                                              /s/ G. V. Prasad
                                              -------------------------------
                                              G. V. Prasad
                                              Chief Executive Officer and
                                              Executive Vice Chairman


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