How injectable obesity treatment works
Modern medicines can influence satiety, appetite and other metabolic pathways. They are used alongside nutrition, physical activity and other sustainable lifestyle measures rather than as a replacement for them.
Products differ in active ingredient, mechanism, dosing, contraindications and adverse effects. Choosing a medicine based only on a brand name or another person’s experience is not safe.
Who may be eligible
For some medicines authorised in the EU, adult weight-management treatment is indicated from a BMI of 30 kg/m², or from 27 to under 30 kg/m² when at least one weight-related comorbidity is present. These are regulatory criteria, not an automatic entitlement to treatment.
Wegovy, Mounjaro and Saxenda
Safety and sourcing
Prescription medicines should be obtained through a legal supply chain after appropriate clinical assessment. Unverified websites, marketplaces and social media offers can expose people to counterfeit products, poor storage or uncertain ingredients.
Sources and review
Information is based on European regulatory sources. Availability, reimbursement and prescribing rules vary between EU countries.
Sources last checked: 1 September 2026.