Panadol night is a GlaxoSmithKline painkiller intended for use at night. It consists of 500 milligrams of paracetamol, 25 milligrams of diphenhydramine hydrochloride (a sedating antihistamine) and other "non-hazardous ingredients"[1] It is sold in the United Kingdom, New Zealand, Australia and the Middle East. It became available as an over the counter medication in the UK in 1996.