How Safe Is Colimax Drugs In Infants?

Hello Doctor, my daughter is just 27 days old, for the past 1 week she starts crying daily around 11 to 11:30 at night and as time goes her crying gets increased. I am giving colimax to her, after that she subsides slowly. Please let me know whether is it safe to give colimax daily and will it have any side effects ? Also why my daughter is crying at this particular time?