SUDAFED SINUS PAIN X16(BLISTER) contains the active ingredients Paracetamol and Pseudoephedrine hydrochloride. Paracetamol is an analgesic. It works to stop the pain messages from getting through to the brain. It also acts in the brain to reduce fever. Pseudoephedrine hydrochloride belongs to a group of medicines called sympathomimetic decongestants.