Shares of Cipla plunged over 8 per cent on Thursday after the US health regulator pulled up the drug major for various manufacturing lapses at its Pithampur (Madhya Pradesh) based manufacturing facility. The stock tanked 8.10 per cent to Rs 1,168.60 on the BSE. During the day, it dropped 8.37 per cent to Rs 1,165.10.At the NSE, it fell 7.63 per cent to Rs 1,174.40.The company's market valuation eroded by Rs 8,319.48 crore to Rs 94,344.05 crore.