The scrip tanked 7.93 per cent to Rs 1,050 on BSE.
On NSE, it dipped 10.83 per cent to Rs 1,015.
Meronem is anti-bacterial used for the treatment of serious infections in hospitalised patients.
The company has received a notice from AstraZeneca UK for termination of distribution arrangements for Meronem in India, AstraZeneca Pharma India said in a regulatory filing yesterday.
"The current distribution arrangement for Meronem in India will terminate in six months," it added.
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