A medicament for use in treating babies suffering from colic. The medicament comprises diphenhydramine hydrocloride (HCl), belladonna tincture, a buffer, flavorants, such as sweetener and absolute alcohol. The medicament is treated by gamma ray bombardment or having a preservative incorporated therein for increasing the medicament's shelft life. The medicament is preferably orally fed to an infant in a dose of 1 ml per kilogram of the infant's body mass, a maximum dose being 8 ml, and at about four times per hour.