Patients taking a 12mg dose typically lost more than a quarter of their body weight (28.3 per cent) in just 18 months - the equivalent of 31.9kg or 5 stone.

A new weight loss drug from Eli Lilly made patients lose 28% of their body weight on average, levels achieved only by surgery before.

Patients taking a 12mg dose typically lost more than a quarter of their body weight (28.3 per cent) in just 18 months - the equivalent of 31.9kg or 5 stone.