Extending its previous session's rally, the stock rose by 4.5 per cent to Rs 241.40 on BSE.
On NSE, it gained 4.51 per cent to Rs 242.
In the previous session also the stock had soared up to 3.5 per cent.
"The company has received Abbreviated New Drug Application (ANDA) approval from the United States Food and Drug Administration (USFDA) for Quetiapine Fumarate tablets," Unichem Laboratories had said in a BSE filing yesterday.
"The product will be commercialised from Unichem's Ghaziabad plant. Active Pharmaceutical Ingredient will also be made in house at Pithampur API plant," the company had said.