Wegovy vs. Mounjaro vs. Saxenda: A UK Guide to Effectiveness and Price

Navigating the world of private weight loss medications can be complex. Three popular injectable treatments often come up: Wegovy, Mounjaro, and Saxenda. While they all offer a powerful tool for weight management, they differ in how they work, their injection schedules, and their price.

This guide will help you understand the science behind each medication and provide a fair price comparison to help you make an informed decision for your health and budget.

What They Contain and How They Work

Wegovy (Semaglutide)

What it contains: The active ingredient in Wegovy is Semaglutide.

How it works: Semaglutide is a GLP-1 receptor agonist. It mimics a gut hormone that suppresses appetite and slows digestion, helping you feel fuller for longer. Wegovy is a once-weekly injection.

Mounjaro (Tirzepatide)

What it contains: The active ingredient in Mounjaro is Tirzepatide.

How it works: Tirzepatide is a dual-action medication, acting as an agonist for both GLP-1 and GIP receptors. By targeting two hormones, it has a comprehensive effect on appetite and metabolism. Mounjaro is also a once-weekly injection.

Saxenda (Liraglutide)

What it contains: The active ingredient in Saxenda is Liraglutide. Generic versions of liraglutide are also available under different brand names.

How it works: Like Wegovy, liraglutide is a GLP-1 receptor agonist. It mimics the same gut hormone to help suppress appetite. The key difference is that Saxenda is a once-daily injection.

Effectiveness: A Head-to-Head Look

Clinical trials have shown all three medications to be highly effective, but with different average outcomes.

• Wegovy: Participants in clinical trials typically achieved an average weight loss of up to 15% of their body weight over a 68-week period.
• Mounjaro: Studies have shown that participants lost an average of up to 21% of their body weight over 72 weeks. The dual-action mechanism of Mounjaro often results in greater average weight loss for some patients.
• Saxenda: As the first GLP-1 injection approved for weight loss, Saxenda is effective, with clinical trials showing users lose an average of 5-10% of their body weight over a year.

It is important to note that these are averages from studies, and individual results will vary based on diet and exercise.

Price Comparison: The Recent Market Shifts

This is where the biggest differences lie, and why comparing is so important for your budget.

• Wegovy: The starting dose price for Wegovy can be found for as low as £85 a month at some UK online pharmacies.
• Mounjaro: Due to recent price increases from the manufacturer, the starting dose of Mounjaro is significantly more expensive, with prices often starting at £129 and up to £180 at some online clinics. A monthly supply of a maintenance dose (15mg) can now be priced at £300 or more, making it one of the most expensive private options.
• Saxenda (Generic Liraglutide): Since its patent expired, generic liraglutide has become a very budget-friendly option. While branded Saxenda is often out of stock, its generic versions can be found for as low as £120-£150 for a full month's supply.

Due to this market change, generic liraglutide (Saxenda) is now the most economically favorable option, while Wegovy offers a strong balance of effectiveness and cost. Mounjaro, while potentially the most effective, is also the most expensive.

Which One is Right for You?

The choice between these medications should always be made in consultation with a qualified healthcare professional. They will consider your individual health, medical history, and weight loss goals.

Choose Wegovy if: You are seeking a highly effective, once-weekly injection that offers a strong balance of results and affordability.

Choose Mounjaro if: You have not responded well to a GLP-1-only medication, are seeking the highest possible weight loss, and are comfortable with the higher cost.

Choose Saxenda/Liraglutide if: You are looking for the most affordable injectable option, you prefer a daily injection routine, or you have had previous success with liraglutide and are looking to switch to a more budget-friendly generic.

Regardless of your choice, be sure to use a price comparison website to find the best deal from a reputable, GPhC-regulated pharmacy.