It’s been deemed a ‘miracle drug.’

Wegovy – the new weight loss medicine, is now available on the NHS and could be a game changer for Britain’s obesity crisis.

But, as the nation tries to get its hands on the drug, doctors warn it could cause a ‘genuine threat to patient safety.’

So, how does it work? And are there enough regulations in place to stop it becoming a danger?

ITV News Health and Science Correspondent Martin Stew tells Tom Bradby what you need to know...