Wegovy injection in the UK: uses, doses and treatment

What Wegovy injection is

Semaglutide acts on a hormone receptor involved in appetite and blood glucose. Many people feel satisfied by smaller meals, and constant thoughts about food often quieten. The goal is lasting better health. Wegovy is not meant to make eating impossible. Appetite changes vary from person to person, and feeling little after the first injection does not mean treatment has failed.

Wegovy injection and Wegovy tablets contain the same active substance. Their dose schedules and instructions differ, and you cannot swap one milligram figure for the other. Ozempic and Rybelsus are also semaglutide brands, each with its own licence and presentation. A shared ingredient does not make them interchangeable. Any switch needs a prescriber to decide.

Who Wegovy injection is licensed for

The adult weight-management licence covers a starting BMI of 30 or more, or 27 or more with a weight-related condition. A separate adolescent indication has its own criteria. The licence covers more people than NHS funding does. A private prescriber still has to judge whether the expected benefits outweigh your individual risks.

The cardiovascular indication applies to adults with established cardiovascular disease and overweight or obesity. Wegovy lowers risk. Nobody can promise you will avoid a heart attack. Keep taking your existing heart medicines and attending follow-up.

UK prescribing information also covers non-cirrhotic metabolic dysfunction-associated steatohepatitis (MASH) with moderate to advanced fibrosis, stages F2 to F3, in adults. You need a specific liver assessment for this. Ordinary fatty liver or one abnormal blood test does not qualify you on its own.

How a course of treatment runs

You usually start at 0.25 mg weekly and step up in stages. The standard maintenance dose is 2.4 mg. UK authorisation also allows 7.2 mg for selected adults with obesity after time on 2.4 mg. Nobody starts on 7.2 mg, and few people need it. If side effects are hard to cope with, agree a slower plan with your prescriber.

Most UK lower-strength supplies come in FlexTouch pens holding four weekly doses. The 7.2 mg dose has its own single-dose device. Follow the leaflet for the pen you were given. Videos made for another country or device may show different steps.

Benefits and practical demands

Trials show meaningful average weight loss. Your own result may be higher or lower than the average. Treatment also takes practical effort: safe storage, a weekly routine, needle disposal, appointments and enough food and fluid. If you pay privately, cost it over a realistic length of treatment, including maintenance.

Digestive side effects are common, especially while doses rise. Get prompt medical help for severe persistent abdominal pain, being unable to keep fluids down, sudden loss of vision or signs of a severe allergic reaction. These symptoms are warning signs. They do not show the medicine is working well.

What to agree with your prescriber

Agree your main health goals, how you will measure progress, who deals with side effects and when treatment gets reviewed. Mention pregnancy plans, other medicines, past pancreatitis, gallbladder problems and any serious digestive disease. A good plan also covers late deliveries, travel and what happens if you need to stop. Talk about long-term care well before you reach a target weight.