The 24-year-old schoolteacher, who was obese but non-diabetic, was prescribed Mounjaro for weight loss – and after seven months was injecting herself with 12 milligram (mg) doses. The 24-year-old schoolteacher, who was obese but non-diabetic, was prescribed Mounjaro for weight loss – and after seven months was injecting herself with 12 milligram (mg) doses.