Heyy Deekshik....

According to the average sale/day one can get income ranging between 2 to 3 lks per month.

but there are various factors that affect this business. some of them are-:

1. Number of drug store in and around a particular area.
2. Number of hospitals near the drug store as it provide vital costumers .
3. Availability of prescription drugs .

All in all its a good business to invest in and can provide stable income .

Yes you can also work in pharmacy sector but then you won't be able to give much time to your own store.