My 25 day old daughter is not pooping since 3 days..she is on breastfeed..i am giving her colic aid drops(6)since 1 week.can this b the reason?

Could be: Simethicone drops can cause either diarrhea or constipation. However, breastfed exclusively babies also can have less frequent stools going up to 2 weeks without having a bowel movement.

Define constipation: Breast fed kids may go a little every feed or one bulky stool every 7-10 days & if soft they are not constipated. Any stool that is dried out is constipation & a sign things are not moving along fast enough. Fussy is whatever baby feels pissy about, often fatigue.The drops likely have nothing to do with it. Most are similar to a mild dilute soap.