[DR. REDDY'S LOGO]

                                                Dr. Reddy's Laboratories Ltd.
                                                7-1-27 Ameerpet
                                                Hyderabad 500 016 India
                                                Tel: 91 40 373 1946
                                                Fax: 91 40 373 1955
                                                www.drreddys.com
                                                ----------------


February 10, 2006

Cecilia Byle, Chief
Office of Global Security Risk
Securities and Exchange Commission
Washington, D.C. 20549
United States of America

         Re:      Dr. Reddy's Laboratories Limited
                  Form 20-F for fiscal year ended March 31, 2004
                  Letter from Securities and Exchange Commission dated September
                  30, 2005 File No. 1-15182

Dear Ms. Byle:

With reference to your letter dated September 30, 2005  requesting  supplemental
information in connection with Dr. Reddy's Laboratories  Limited's contacts with
countries that have been  identified as state  sponsors of terrorism,  set forth
below are our responses to your letter. For your convenience,  your requests for
supplemental information have been restated below in italics.

Form 20-F for fiscal year ended March 31, 2004
- ----------------------------------------------

General -
- -------

We note that in your June 20, 2005 response to our December 28, 2004 comment
letter, you state that you do not have any marketing operations for your Active
Pharmaceutical Ingredients (API) segment in North Korea or Syria. Please clarify
whether you have any type of contacts with either North Korea or Syria. You also
responded that your "API segment markets a limited number of products in Iran."
Please describe the products you market in Iran, including their uses. Clarify
whether you have any contacts with Iran other than through your API segment, and
advise us of the dollar total of revenue related to Iran for all company
segments for 2004.

We also note that your 20-F for the fiscal year ended March 31, 2005 states at
page 37 that certain of your Formulations have been certified by Sudan's
Ministry of Health. Please identify all contacts you have with Sudan, the
products you market in Sudan and their uses; and the dollar total of revenue
related to Sudan for all company segments for 2004.




Cecilia Byle, Chief
Office of Global Security Risk
Securities and Exchange Commission
February 10, 2006
Page 2


Please discuss the materiality of your  operations or contacts with Iran,  Syria
(if any),  North  Korea (if any),  and/or  Sudan,  and whether  those  contacts,
individually or in the aggregate, constitute a material investment risk for your
security holders.  In preparing your response,  please consider that evaluations
of materiality  should not be based solely on quantitative  factors,  but should
include  consideration  of all factors  that a  reasonable  investor  would deem
important in making an investment  decision,  including the potential  impact of
corporate  activities  upon a  company's  reputation  and share  value.  In this
regard,  we note that Arizona and Louisiana have adopted  legislation  requiring
divestment  from, or reporting of interests in,  companies that do business with
U.S.-designated state sponsors of terrorism.  We note also that Illinois and New
Jersey have  adopted  legislation  requiring  divestment  from,  or reporting of
interests  in,  companies  that do business  with Sudan,  and several other U.S.
states recently have proposed similar legislation.

Response: We do not have any material operations in either North Korea or Syria,
nor do we have any type of contacts with either North Korea or Syria.

Our Active Pharmaceutical  Ingredients (API) segment markets a limited number of
products in Iran.  Our sales in Iran,  which are conducted  through  independent
agents, were as follows for the fiscal year ended March 31, 2004:






Product          Quantity (KG)   Sales ($US)  Therapeutic Category/Sub-category
                                     

Ibuprofen              25,000       $203,550  Pain management/Analgesic
Enrofloxacin            6,000        138,000  Anti-infective/Anti-bacterial (used for
                                                     veterinary purposes)
Ranitidine              7,000        129,500  Gastro-intestinal/Anti-ulcerant
HCI Form 2

TOTAL                               $471,050




Our Formulations segment markets a limited number of products in Sudan through
independent distributors. Our sales in Sudan for the fiscal year ended March 31,
2005 were as follows:




                                                             Sales  Therapy
Product Name             Dosage Form        Strength      (in $US)  Category
                                                        

Cardiopril 10 mg         Capsules           10mg           $10,000  Cardiovascular
Cardiopril 5 mg          Capsules           5mg              5,159  Cardiovascular
Ciprolet 500 mg          Tablets            500mg          269,610  Anti Infective
Enam 10 mg               Tablets            10mg            13,203  Cardiovascular
Enam 5 mg                Tablets            5mg              4,988  Cardiovascular
Lanzap Caps              Capsules           30mg            68,340  Gastro Intestinal
Reclide 80 mg            Tablets            80mg             5,964  Diabeto




Cecilia Byle, Chief
Office of Global Security Risk
Securities and Exchange Commission
February 10, 2006
Page 3



                                                              Sales  Therapy
Product Name             Dosage Form        Strength      (in $US)  Category
                                                        
Stamlo 5 mg              Tablets            5mg             68,916  Cardiovascular
TOTAL                                                     $446,180


We do not view the foregoing sales to Iran or Sudan as material to the revenues
in our API or Formulations segments, nor to our overall revenues. We have no
contacts with Iran other than through our API segment, and have no contacts with
Sudan other than through our Formulations segment.

We do not anticipate that our current or planned operations in Iran or Sudan
will be material to the operations of the Company. We do not believe that our
API marketing activities in Iran or our Formulations marketing activities in
Sudan constitute a material investment risk for our security holders.

We acknowledge that:

o   our company is  responsible  for the adequacy and accuracy of the disclosure
    in our SEC filings;

o   staff comments or changes to disclosure in response to staff comments do not
    foreclose  the  Commission  from taking any action  with  respect to our SEC
    filings; and

o   our company  may not assert  staff  comments as a defense in any  proceeding
    initiated by the Commission or any person under the federal  securities laws
    of the United States.

Should you have any concerns or questions, please call me at the number listed
above.

Respectfully submitted,

Dr. Reddy's Laboratories Limited


By:     /s/ V. Viswanath
    ----------------------
       V. Viswanath
       Company Secretary