Lemsip Max Cold & Flu Capsules Lemsip Max Cold & Flu Capsules provide effective relief from the symptoms of cold & flu, including aches & pains, sore throats, headaches, nasal congestion & fever. Lemsip Max Cold & Flu Capsules contain three active ingredients: Paracetamol: A painkiller that also reduces your temperature when you have a fever. Phenylephrine hydrochloride: A nasal decongestant that reduces swelling in your nasal passages, relieving congestion & reducing the pressure which may cause a headache. Caffeine: A mild stimulant that helps relieve fatigue & drowsiness through the day.