Paracetamol Suppositories contain a medicine called paracetamol. This belongs to a group of medicines called pain-killers (analgesics). A suppository is a small, torpedo-shaped, medicine which is inserted into the back passage (rectum). Paracetamol Suppositories are used to treat pain and high temperature (fever) in children from 1 to 5 years of age. They can be used in children who find it difficult to take paracetamol as tablets or syrup.