Instagram has been urged by health leaders to clamp down on influencers using its platform to promote and sell a “dangerous” and unlicensed drug. Senior NHS officials in England have written to the head of Instagram, Adam Mosseri, urging the company to shut down any accounts and content that promotes or attempts to sell Apetamin. A BBC investigation said that Apetamin was being marketed by social media influencers as a way to get an extreme hour-glass, curvy figure, but it can cause side-effects including fatigue, jaundice and liver failure. The letter, from NHS England’s national mental health director, Claire Murdoch, and national medical director, Professor Stephen Powis, alongside Kitty Wallace of the Body Dysmorphic Disorder Foundation, said the drug could result in “serious harm” to anyone who takes it.