Why is melatonin illegal in England and Ireland?

Melatonin is classified as a prescription-only medication in England and Ireland due to concerns about its safety, efficacy, and potential misuse. Regulatory authorities, including the Medicines and Healthcare products Regulatory Agency (MHRA) in the UK, require medical oversight to ensure proper use and dosing. As a result, it is not available over-the-counter and must be prescribed by a healthcare professional. This approach aims to protect public health and ensure that melatonin is used appropriately in managing sleep disorders.