Sudafed Congestion & Headache Max Strength Capsules Sudafed Congestion & Headache Max Strength Capsules help relieve the symptoms of pain & congestion caused by sinusitis, which include stuffy nose, blocked sinuses, headache, fever & aches & pains. Suitable for adults & children from 12 years, Sudafed Congestion & Headache Max Strength Capsules contain: Paracetamol: an analgesic & antipyretic which helps to relieve pain & fever. Caffeine: a stimulant to help combat tiredness & to increase the pain relief. Phenylephrine hydrochloride: a decongestant to reduce swelling in the passages of the nose to help you breathe more easily.