Shares of Biocon (down 5.94 per cent), Sun Pharmaceutical Industries (down 2.83 per cent), Cipla (down 1.62 per cent) and Dr. Reddy's Laboratories (down 1.44 per cent), were the top losers in the pharma pack.
Lupin (down 1.01 per cent), Aurobindo Pharma (down 0.67 per cent) and Cadila Healthcare (down 0.16 per cent) too, appeared among top laggards.
Benchmark NSE Nifty50 index was down 67.05 points at 10,178.2 while BSE Sensex was down 184.09 points at 33,950.29 at that time.
Among the 50 stocks in the Nifty index, 12 were trading in the green, while 38 were in the red.
Shares of YES Bank, BHEL, Tata Motors, ICICI Bank, SBI, Bharti Infratel, Asian Paints, Bank of Baroda and RIL were among the most traded shares on the National Stock Exchange.