Exhibit 99.1

October 13, 2025

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

BSE Limited (Stock Code: 500124)

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

NSE IFSC Ltd. (Stock Code: DRREDDY)

Dear Sir/ Madam,

Sub: Intimation of Earnings call

Please find enclosed a notification titled “Dr. Reddy's to release Q2FY26 results on Friday, October 24^th, 2025; Earnings call slated for Friday, October 24^th @19:30 PM IST / 10:00 AM ET.”

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 to release Q2FY26 results on Friday, October 24^th, 2025;

Earnings call slated for Friday, October 24^th @19:30 PM IST / 10:00 AM ET

Hyderabad, India, October 13^th, 2025

Dr. Reddy's Laboratories Ltd. (BSE: 500124, NSE: DRREDDY, NYSE: RDY, NSEIFSC: DRREDDY) will announce results for the quarter and six months ended September 30^th, 2025 on Friday, October 24^th, 2025 after the Board Meeting.

Summary of Events

Earnings Call

Following the release, the management of the Company will host its earnings call to discuss the Company’s financial performance.

Pre-register with the link below: