Health authorities are detecting tainted or mis-sold street drugs, resulting in hospitalisations. The coroner has once again made the case for pill testing.

Pills are generally shelf-stable and don’t require much packaging beyond a child-proof bottle. Saunders predicts they would be less expensive and less prone to shortages that have plagued Wegovy.

Simply sign up to the Life & Arts myFT Digest -- delivered directly to your inbox. First of all, I should explain that the blue pill in this question is not Viagra. For those who do not know, the ...