Compare today’s Wegovy prices

Both Wegovy and Mounjaro are weekly weight-loss injections used by people who meet certain weight and health criteria, but they’re not identical. Wegovy contains semaglutide, while Mounjaro contains tirzepatide, which hits two hormone targets instead of one. In head to head trials, Mounjaro generally leads to bigger average weight loss than Wegovy, but it often works out as the more expensive option too.

The most common Wegovy side effects are tummy related: nausea, vomiting, diarrhoea, constipation, indigestion, bloating and stomach pain. Some people also notice headaches, tiredness and heartburn, especially when the dose is being increased. These are very similar to the side effects seen with Mounjaro, because both medicines work on the same gut hormone pathways.

Whether Wegovy feels “worse” than Mounjaro is very individual. Some people say they get more sickness and reflux on Wegovy and feel better on Mounjaro, others are the exact opposite. A lot of this comes down to how quickly the dose is pushed up, how sensitive your stomach is, and what you eat around the injection.

Right now Wegovy usually works out cheaper than Mounjaro in the UK mainly because of the list price. Eli Lilly hiked Mounjaro prices by up to around 170% in September 2025, which pushed private Mounjaro costs way up across all providers. Wegovy’s prices haven’t jumped in the same way, so for many doses it’s now the more cost effective GLP-1 injection per month. Competition also plays a part: lots of UK pharmacies advertise “cheap Wegovy” to attract patients who can’t afford Mounjaro at the new prices, so you often see discount codes and price-match deals. If you’re hunting for the cheapest Wegovy UK offer, it’s worth comparing the full monthly cost at your dose, because that’s where you’ll see the gap between Wegovy and Mounjaro most clearly.