Mumbai, Aug. 13 -- Dr Reddys Laboratories Ltd gained for a fifth straight session today. The stock is quoting at Rs 1249.8, up 2.42% on the day as on 12:44 IST on the NSE. The benchmark NIFTY is up around 0.54% on the day, quoting at 24620.3. The Sensex is at 80549.18, up 0.39%. Dr Reddys Laboratories Ltd has slipped around 0.06% in last one month. Meanwhile, Nifty Pharma index of which Dr Reddys Laboratories Ltd is a constituent, has slipped around 1.19% in last one month and is currently quoting at 21753.5, up 1.79% on the day. The volume in the stock stood at 4.51 lakh shares today, compared to the daily average of 14.67 lakh shares in last one month. The benchmark August futures contract for the stock is quoting at Rs 1250.1, up 2.45%...