Hi There, My Baby Girl Is 2 Months Old And

Hi there, my baby girl is 2 months old and she is not pooping at regular intervals.
Since last 3 weeks, we have to take her to the doctor every 5 days and they insert thermometer to make her poop. Now i consulted an other pediatrician and he gave me Sorbiline to be taken 3 times a day. Now she is pooping ok. Please advise if taking sorbiline is good or should i take her to hospital every 5 days and also what all i should i be doing to make her come out of constipation.