Beechams Cold & Flu Capsules Beechams Cold & Flu Capsules provide relief from the symptoms of colds, flu & chills, including headache, shivers, aches & pains, blocked nose & painful sinuses, catarrh & sore throat. Beechams Cold & Flu Capsules contain three active ingredients: Paracetamol: A painkiller that also reduces your temperature when you have a fever. Phenylephrine hydrochloride: A decongestant which unblocks your nose & sinuses helping you breathe more easily. Caffeine: A mild stimulant.