Yes, some of these medicines can cause constipation. Atarax and Monticope contain antihistamines, which have drying effects that often lead to constipation. Indikof may also contribute to this side effect. Please do not give your baby any laxatives or lifestyle medications without consulting your pediatrician first, as self-medicating infants can be dangerous. For safe relief, ensure your baby is well-hydrated with breast milk, formula, or water. You can also try gentle tummy massages in a clockwise motion and 'bicycle legs' exercises to help stimulate bowel movements. If constipation persists, contact your pediatrician for a safe, prescribed treatment.