Choosing between Saxenda vs Wegovy? Here’s a clear side-by-side comparison to help you decide which weight loss injection fits your goals.
Both Saxenda and Wegovy are GLP-1 receptor agonists prescribed alongside a reduced-calorie diet and increased physical activity, but the Saxenda vs Wegovy decision often comes down to dosing frequency, active ingredient, and how your body responds to each.
Saxenda and Wegovy are both GLP-1 weight loss injections, but unlike Ozempic and Wegovy, they contain genuinely different active ingredients. Here’s how they compare.
Different active ingredients
Saxenda contains liraglutide, an earlier-generation GLP-1 medicine. Wegovy contains semaglutide, a newer molecule that stays active in the body longer — which is why Wegovy is dosed weekly, while Saxenda requires a daily injection.
How do GLP-1 medicines work?
Both liraglutide and semaglutide are GLP-1 receptor agonists — they mimic a naturally occurring gut hormone (glucagon-like peptide-1) that’s released after eating. This hormone signals to the brain that you’re full, slows down how quickly food leaves the stomach, and helps regulate blood sugar. Semaglutide’s molecular structure allows it to remain active in the bloodstream considerably longer than liraglutide, which is the main reason it only needs to be injected once a week rather than daily.
Dosing schedule
Saxenda is titrated up over about five weeks to a maintenance dose of 3mg, injected once every day. Wegovy is titrated up over roughly 16-20 weeks to a maintenance dose of 2.4mg, injected once a week. The slower titration for Wegovy is designed to give the body more time to adjust, which can help reduce the intensity of early side effects.
Effectiveness
Trial data generally shows greater average weight loss with semaglutide (Wegovy) than liraglutide (Saxenda). In the SCALE trial programme, liraglutide 3mg was associated with average weight loss of around 5-6% of starting body weight over 56 weeks. In the STEP trial programme, semaglutide 2.4mg was associated with average weight loss of around 15% of starting body weight over 68 weeks. Individual response varies considerably, and some people tolerate one medicine better than the other regardless of the average trial results.
Common side effects
Both medicines share a similar side-effect profile, since they work on the same hormone pathway. The most frequently reported effects are gastrointestinal: nausea, diarrhoea, constipation, and vomiting, particularly during dose increases. These are usually described as mild to moderate and tend to improve as the body adjusts. Injection-site reactions are also possible with either medicine. Less common but more serious risks include gallbladder problems and pancreatitis, which is why ongoing clinical review is part of any prescription.
Price comparison
| Medication | Frequency | Price range |
|---|---|---|
| Saxenda | Daily | $129.99 – $200 |
| Wegovy | Weekly | $75 – $255 |
Which should you choose?
If a once-weekly routine appeals to you, Wegovy may be more convenient. Some people prefer Saxenda’s daily dosing because it allows finer control if side effects occur, since any adjustment takes effect sooner. Your prescriber can help weigh this against your medical history and goals.
Frequently Asked Questions
Is Saxenda older than Wegovy?
Yes, liraglutide (Saxenda) was developed before semaglutide (Wegovy) and was one of the first GLP-1 medicines used for weight management.
Can I switch from Saxenda to Wegovy?
Yes, this is a common switch, though it should be done under clinical guidance with an appropriate starting dose.
Which has fewer side effects?
Both share similar gastrointestinal side effects; neither is clearly better tolerated across the board, though individual experiences differ.
What happens if I miss a dose?
Because Saxenda is a daily injection and Wegovy is weekly, the guidance for a missed dose differs between the two. The patient information leaflet supplied with your medication sets out the specific timeframes to follow, and your prescriber can advise if you’re unsure.
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