Is Wegovy as effective as Mounjaro?

Yes. At the new highest doses (up to 7.2mg weekly), Wegovy delivers an average ~21% weight loss at 72 weeks, comparable to Mounjaro in clinical studies.

Many patients achieve even more with pharmacist-led adjustments and ongoing support.

What’s the main difference between Wegovy and Mounjaro?

The main difference between Wegovy and Mounjaro lies in the active ingredient. Both are once-weekly GLP-1 injections designed to support weight loss, but Wegovy contains semaglutide, a treatment that has been widely used by millions of patients worldwide and extensively studied in clinical trials. Mounjaro, on the other hand, contains tirzepatide, a newer dual-acting medication that works slightly differently in the body.

How does switching work?

• Review: We check your history and tolerance.
• Match: If eligible, we place you on an equivalent Wegovy dose.
• Transition: A 7-day gap between your last Mounjaro and first Wegovy (others often require 28 days).
• Support: Pharmacist check-ins and lifestyle guidance keep you on track.

Are Mounjaro prices going up?

Yes — from 1 September 2025, Eli Lilly will raise the UK list price for Mounjaro.

This applies nationwide across pharmacies, private clinics, and digital providers.

Why is the cost increasing?

Eli Lilly is aligning UK pricing with other major markets.

When Mounjaro first launched in the UK, costs were kept lower to speed access. With more evidence and a stronger market presence, prices are being revised upward.

Because wholesalers supply all providers, these changes automatically affect patient prices everywhere.

Why Wegovy is now the smarter choice

• Similar results: Higher-dose Wegovy (7.2mg) achieves ~21% weight loss at 72 weeks, matching Mounjaro’s outcomes.
• Heart health benefits: The only GLP-1 in the UK approved to reduce heart attack and stroke risk in people with obesity and heart disease.
• Trusted care: Unlimited dose adjustments, pharmacist oversight, and tailored lifestyle support.

Can I switch if my BMI is now lower?

Yes — if you’re already on a GLP-1 and your BMI is above 22, you may still be eligible (subject to safety criteria).

What proof do I need to switch?

We accept:

• A photo of your prescription label
• An email confirmation from your provider
• Any document showing your name, the medication, strength, and date of prescription

Is it safe to switch mid-treatment?

Yes. Switching between GLP-1 medications is considered safe with clinical oversight. Wegovy is also suitable for patients taking the contraceptive pill.

How long does the switch take?

Most patients can switch immediately. If a clinical review is needed, you’ll usually hear from a prescriber within one working day.

What if Wegovy isn’t right for me?

If Wegovy doesn’t suit you, our clinicians will review your options — including moving back to Mounjaro if appropriate.

Can I return to Mounjaro if Wegovy isn’t right for me?

Yes. If Wegovy isn’t the best fit, our clinicians will reassess your treatment and, if appropriate, support a switch back to Mounjaro — without extra charges.