Lemsip is a well-known manufacturer of cold and flu remedies in the United Kingdom.
Their original and best-known product is a lemon flavoured hot drink (hence the lem in Lemsip) containing paracetamol (an analgesic), phenylephrine hydrochloride (a decongestant) and Ascorbic acid (Vitamin C).
They have grown to be a household name in the UK and now offer a range of related products including Lemsip cold & flu capsules, decongestant nasal sprays and capsules, throat lozenges and cough medicine.