Basically, all chemists are selling theirs medicines to the customers but hopefully you will have already found the services of apollo pharmacy at whole night.
I had stuck many times at night for some urgent medicines and luckly I found apollo pharmacy was opened at night too and got medicine.
There are outlet list of apollo pharmacy which are opened 24 hours and 7days. Amazing!
Example of sector 7 dwarka, sector 10, sector 4 and etc dwarka new delhi india.