Lemsip Max Day & Night Cold & Flu Relief Capsules Lemsip Max Day & Night Cold & Flu Relief Capsules effectively relieve the symptoms associated with colds & flu, including relief from aches & pains, sore throats, headaches, nasal congestion & lowering of temperature. Lemsip Max Day & Night Cold & Flu Relief Capsules contain: Paracetamol: A painkiller that is effective against aches & pains, including headaches, & 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. The day capsules also contain caffeine, a mild stimulant that helps relieve fatigue & drowsiness through the day.