Weekly injection weight loss: what to know

Many weekly injections act on gut-hormone pathways involved in appetite, fullness, and blood-sugar control. A GLP-1 receptor agonist is one type; other medicines act on more than one pathway. They are not a substitute for assessing why weight has changed or for building sustainable eating, activity, sleep, and support habits.

A clinician considers your health history, current medicines, diabetes status, digestive symptoms, pregnancy plans, and previous weight-management attempts. Nausea, vomiting, diarrhoea, constipation, reduced appetite, and abdominal discomfort can occur, especially when treatment is started or adjusted.

Use these medicines only through a qualified prescriber and obtain them from a regulated pharmacy. Follow the prescribed injection schedule, store the medicine as instructed, and never share pens or needles. Keep a record of symptoms, food and fluid intake, and any other medicines. Pair treatment with a weight management programme so nutrition and movement advice can be adjusted to you.

Contact a clinician urgently for persistent vomiting, inability to keep fluids down, severe or continuing abdominal pain, yellowing of the skin, fainting, confusion, or signs of an allergic reaction such as facial swelling or difficulty breathing. People with diabetes should seek advice for unusual glucose readings or symptoms of hypoglycaemia.

Ask which medicine fits your goals, what benefits and side effects to expect, how doses are adjusted, what to do after a missed dose, and how your diabetes medicines or other prescriptions may need review.