Pharmaceutical Melatonin, a natural hormone that is produced by the pineal gland and used by many long-haul airline travellers to mitigate their jet-lag symptoms, has gained its first approval in the UK, but as a treatment for sleep onset insomnia in children and adolescents aged six-17 years with attention-deficit hyperactivity disorder (ADHD), where sleep hygiene measures have been inadequate. 4 October 2022