Can i give allecet and calpol at the same time?

Probably ok: Allecet is cetirizine, an antihistamine. Calpol is probably acetaminophen (paracetamol) or ibuprofen, but one must check the labels on all her medications. Usually, people don't have problems taking one antihistamine in combination with paracetamol or ibuprofen, as long as they don't have drug allergies to such ingredients. If worried, one should be sure to ask her primary care doctor.