The jabs are highly effective, but experts warn that users should be aware of the risk of weight gain once they stop taking the drugs.
How do Wegovy and Mounjaro work?
There are many drugs on the market for weight loss, which can be in the form of an injectable pen or a capsule.
Weight-loss injections which can be prescribed by the NHS are:
- semaglutide, marketed under the brand name Wegovy
- tirzepatide, sold as Mounjaro
- liraglutide, sold as Saxenda
The drugs are given as weekly injections via pre-filled pens that can be self-administered into the upper arm, thigh or stomach.
They work as an appetite suppressant by mimicking a hormone called GLP-1 which makes people feel fuller. Mounjaro also affects metabolism and helps regulate energy balance.
The jabs might work better for some people than for others. Experts are starting to understand how different factors, such as genetics, might be involved.
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