Exhibit 99.1

Dr. Reddy’s Laboratories Ltd. 8-2-337, Road No. 3, Banjara Hills, Hyderabad - 500 034, Telangana, India. CIN : L85195TG1984PLC004507   Tel       : +91 40 4900 2900 Fax      : +91 40 4900 2999 Email  : mail@drreddys.com www.drreddys.com

April 23, 2024

National Stock Exchange of India Ltd. (Scrip Code: DRREDDY-EQ)

BSE Limited (Scrip Code: 500124)

New York Stock Exchange Inc. (Stock Code: RDY)

NSE IFSC Ltd. (Stock Code: DRREDDY)

Dear Sir/Madam,

Sub: Press Release

Please find enclosed a Press Release on “Dr. Reddy’s issues voluntary nationwide recall of Sapropterin Dihydrochloride Powder for Oral Solution 100 mg due to Sub-potency”.

This is for your information and records.

Thanking you.

Yours faithfully,

For Dr. Reddy’s Laboratories Limited

K Randhir Singh

Company Secretary, Compliance Officer & Head-CSR

Dr. Reddy’s issues voluntary nationwide recall of
Sapropterin Dihydrochloride Powder for Oral Solution 100 mg
due to Sub-potency

FOR IMMEDIATE RELEASE Hyderabad India and Princeton, NJ, US; April 23, 2024 – Dr. Reddy's Laboratories Ltd. (BSE: 500124, NSE: DRREDDY, NYSE: RDY, NSEIFSC: DRREDDY, along with its subsidiaries together referred to as "Dr. Reddy's"), today announced that it is voluntarily recalling six (6) lots of Sapropterin Dihydrochloride Powder for Oral Solution 100 mg to the consumer level due to powder discoloration in some packets leading to decreased potency. The issue was discovered during an accelerated stability test in addition to customer complaints.

Risk Statement: Reduced efficacy of the product would result in elevated Phenylalaninemia (Phe) levels in patients. Chronically elevated Phe levels in infants and children are likely to cause permanent neurocognitive deficits, including permanent and irreversible intellectual disability, developmental delay, and seizures. Furthermore, elevated Phe levels during pregnancy, especially in early gestation, are associated with microcephaly and congenital heart disease.

Dr. Reddy’s Laboratories Inc. has not received any reports of adverse events related to this recall to date.

The product is indicated to reduce blood phenylalanine (Phe) levels in adult and pediatric patients one month of age and older with hyperphenylalaninemia (HPA) due to tetrahydrobiopterin-(BH4-) responsive Phenylketonuria (PKU) and is packaged in individual packets, 30 per carton. The affected Sapropterin Dihydrochloride Powder for Oral Solution 100mg lots include the following:

Sapropterin Dihydrochloride Powder for Oral Solution 100 mg was distributed nationwide to wholesalers/retailers.

Dr. Reddy’s Laboratories Inc. is notifying its distributors and customers by recall notification letters and is arranging for returns of all recalled products. Anyone with an existing inventory of the product being recalled should examine the product and quarantine any of the recalled lots immediately. Consumers who have Sapropterin Dihydrochloride Powder for Oral Solution 100 mg which is being recalled should contact their physician before stopping use of the product. Consumers who have Sapropterin Dihydrochloride Powder for Oral Solution 100 mg which is being recalled should return it to their place of purchase.

Consumers with questions regarding this recall can contact Dr. Reddy’s Laboratories Inc. by calling 866-733-3952 during office hours from 9 a.m. to 5 p.m. (EST) Monday through Friday. Consumers should contact their physician or healthcare provider if they have experienced any problems that may be related to taking or using this drug product.

Adverse reactions or quality problems experienced with the use of this product may be reported to the FDA's MedWatch Adverse Event Reporting program either online, by regular mail or by fax.

This recall is being conducted with the knowledge of the U.S. Food and Drug Administration.

Please click here to see the full prescribing information for Sapropterin Dihydrochloride Powder for Oral Solution 100 mg.

RDY-0424-639

About Dr. Reddy’s: Dr. Reddy’s Laboratories Ltd. (BSE: 500124, NSE: DRREDDY, NYSE: RDY, NSEIFSC: DRREDDY) is a global pharmaceutical company headquartered in Hyderabad, India. Established in 1984, we are committed to providing access to affordable and innovative medicines. Driven by our purpose of ‘Good Health Can’t Wait’, we offer a portfolio of products and services including APIs, generics, branded generics, biosimilars and OTC. Our major therapeutic areas of focus are gastrointestinal, cardiovascular, diabetology, oncology, pain management and dermatology. Our major markets include – USA, India, Russia & CIS countries, China, Brazil and Europe. As a company with a history of deep science that has led to several industry firsts, we continue to plan ahead and invest in businesses of the future. As an early adopter of sustainability and ESG actions, we released our first Sustainability Report in 2004. Our current ESG goals aim to set the bar high in environmental stewardship; access and affordability for patients; diversity; and governance. For more information, log on to: www.drreddys.com.

Disclaimer: This press release may include statements of future expectations and other forward-looking statements that are based on the management’s current views and assumptions and involve known or unknown risks and uncertainties that could cause actual results, performance or events to differ materially from those expressed or implied in such statements. In addition to statements which are forward-looking by reason of context, the words "may", "will", "should", "expects", "plans", "intends", "anticipates", "believes", "estimates", "predicts", "potential", or "continue" and similar expressions identify forward-looking statements. Actual results, performance or events may differ materially from those in such statements due to without limitation, (i) general economic conditions such as performance of financial markets, credit defaults , currency exchange rates, interest rates, persistency levels and frequency / severity of insured loss events, (ii) mortality and morbidity levels and trends, (iii) changing levels of competition and general competitive factors, (iv) changes in laws and regulations and in the policies of central banks and/or governments, (v) the impact of acquisitions or reorganization, including related integration issues, and (vi) the susceptibility of our industry and the markets addressed by our, and our customers’, products and services to economic downturns as a result of natural disasters, epidemics, pandemics or other widespread illness, including coronavirus (or COVID-19), and (vii) other risks and uncertainties identified in our public filings with the Securities and Exchange Commission, including those listed under the "Risk Factors" and "Forward-Looking Statements" sections of our Annual Report on Form 20-F for the year ended March 31, 2023. The company assumes no obligation to update any information contained herein.