Mumbai, May 13 -- Dr Reddys Laboratories Ltd fell for a fifth straight session today. The stock is quoting at Rs 1268.7, down 0.1% on the day as on 13:19 IST on the NSE. The benchmark NIFTY is up around 0.54% on the day, quoting at 23505.1. The Sensex is at 74897.31, up 0.45%.Dr Reddys Laboratories Ltd has gained around 4.18% in last one month.Meanwhile, Nifty Pharma index of which Dr Reddys Laboratories Ltd is a constituent, has increased around 6.93% in last one month and is currently quoting at 23840.9, up 0.63% on the day. The volume in the stock stood at 77.06 lakh shares today, compared to the daily average of 31.23 lakh shares in last one month. The benchmark May futures contract for the stock is quoting at Rs 1269.7, up 0.13% on t...