Weight-loss injections: what they are and when they are used
The phrase “weight-loss injections” usually refers to prescription medicines used in obesity care. They are not over-the-counter products and they are not suitable for everyone.
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
Wegovysemaglutide · GLP-1 · weekly injection, with daily tablets also authorisedWegovy guide →
Mounjarotirzepatide · GIP/GLP-1 · usually once weeklyMounjaro guide →
Saxendaliraglutide · GLP-1 · usually once daily
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.
Related topics
Weight-loss medications: what options exist in EuropeMedicines used for overweight and obesity are selected according to the approved indication, a person’s health and local availability. They include injections as well as other formulations.→
GLP-1 and weight loss: what the term actually meansGLP-1 is a hormonal signal involved in appetite, food intake and metabolism. Some medicines mimic this pathway, while others combine it with additional hormonal activity.→
Mounjaro vs Wegovy: what is the difference?Both medicines are used for weight management in defined groups of adults in the EU, but they contain different active ingredients and work through different receptor pathways.→
Sources and review
Information is based on European regulatory sources. Availability, reimbursement and prescribing rules vary between EU countries.
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