sudafed mucus relief day & night capsules are specially formulated to help tackle the symptoms associated with common cold & flu including blocked nose headache fever sore throat aches & pains. the day capsules can ease the tired & drowsy feeling you'd normally expect during a bout of cold or flu whilst the night capsules get to work on your symptoms to help you sleep peacefully., round the clock day & night relief unblocks your nose relieves your headache.