Medicines and Products for obesity

Medicines for obesity are an add-on to diet, activity and sleep, not a replacement. They are prescribed by a doctor for people who meet certain criteria, and they work only while taken for most people.

Who may be considered

Adults with obesity, or with overweight and a related condition, when lifestyle changes alone have not been enough. A doctor checks other conditions and current medicines first.

Prescription medicines

• Orlistat: reduces fat absorption. It can cause oily stools, gas and urgency, and affects fat-soluble vitamins.
• GLP-1 based medicines such as semaglutide and liraglutide, given by injection, reduce appetite. They can cause nausea, vomiting, diarrhoea and, rarely, pancreatitis and gallstones. They are not for pregnancy and need medical supervision.
• Other medicines may be used by specialists

Availability, cost and rules differ, so ask your doctor.

Treating related conditions

Medicines for diabetes, blood pressure, cholesterol, thyroid and sleep apnoea, as needed.

Surgery

Bariatric surgery is considered in severe obesity, or lower BMI with serious complications, after specialist assessment.

Cautions

• Do not buy slimming pills, injections or "fat burner" supplements from unlicensed sources. They may contain hidden stimulants, steroids or thyroid hormone.
• Do not use thyroid medicine, diuretics or laxatives to lose weight
• Weight-loss medicines are not for pregnancy, breastfeeding or most children without specialist advice
• Tell your doctor about all medicines and herbs

Remember

Medicines work best with lifestyle changes and regular follow-up with a doctor.