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

February 19, 2018

Corporate Relationship Department	National Stock Exchange of India Ltd.
BSE Limited	“Exchange Plaza”
Dalal Street, Fort	Bandra-Kurla Complex, Bandra (East),
Mumbai – 400 001	Mumbai – 400 051
Fax Nos.: 022-22723121 / 22723719 /	Fax Nos.: 022-26598120/ 26598237/
Scrip Code: 500124	Scrip Code: DRREDDY-EQ

Dear Sirs,

Sub: Update

Further to our intimation dated November 29, 2017 with regard to U.S. Securities Class Action Lawsuit, we would like to inform you that an amended complaint has been filed by the lead plaintiff wherein, our Chairman, COO and Dr. Reddy’s Laboratories Inc., a wholly-owned subsidiary in the U.S. have been added as defendants.

As intimated earlier the Company believes that the asserted claims are without merit and intends to vigorously defend itself against the allegations.

This is for your information and record.

With regards,

/s/ Sandeep Poddar

Sandeep Poddar

Company Secretary

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