NEW DELHI: The Nifty Pharma index traded negative around 11:06AM(IST)on Wednesday in a weak market. Natco Pharma(up 1.27 per cent), Laurus(up 0.63 per cent), Divis Laboratories(up 0.6 per cent), Alkem Laboratories(up 0.42 per cent) and Glaxosmithkline Pharmaceuticals(up 0.35 per cent) were among the top gainers. Glenmark Pharmaceuticals(down 1.97 per cent), Sun Pharmaceutical Industries(down 0.84 per cent), Zydus Lifesciences(down 0.76 per cent), Biocon(down 0.68 per cent) and Torrent Pharmaceuticals(down 0.64 per cent) were the top losers on the index.