"The company has received the final approval from the US Food & Drug Administration (USFDA) to manufacture and market extended Phenytoin Sodium capsules USP, 100mg," Aurobindo Pharma said in a statement.
The approved abbreviated new drug application (ANDA) is for the generic version of Pfizer Inc Parke-Davis Division's Dilantin capsules.
The product has an estimated market size of USD 125 million for 12 months ended April 2015, Aurobindo Pharma said quoting IMS data.
The capsules, a anti-epileptic product is indicated for the control of seizures and prevention and treatment of seizures occurring during or following neurosurgery, it added.
Aurobindo Pharma stock closed marginally down at Rs 1,276.85 on the BSE.