Mounjaro
With medical weight-management now mainstream in the UK, two names dominate: Mounjaro (tirzepatide) and Wegovy (semaglutide). Both are weekly injections that help adults lose weight under clinical supervision — but their ingredients, effectiveness, and pricing differ.
How They Work
Wegovy activates one hormone, GLP-1, which slows digestion and reduces appetite.
Mounjaro, on the other hand, acts on two receptors — GLP-1 and GIP. This dual-action design helps the body regulate both appetite and blood-sugar levels more efficiently, often resulting in greater total weight loss.
| Feature | Wegovy (semaglutide) | Mounjaro (tirzepatide) |
|---|---|---|
| Hormone Targets | GLP-1 only | GLP-1 + GIP |
| Dose Frequency | Weekly | Weekly |
| Avg Weight Loss | ≈ 15% body weight | ≈ 20–22% body weight |
| Starting Dose | 0.25 mg | 2.5 mg |
| Maintenance Dose | 2.4 mg | 15 mg (max) |
Effectiveness of Mounjaro
Clinical trials suggest that Mounjaro users may achieve up to 25 % greater average weight loss than those using Wegovy, thanks to its dual-receptor mechanism. Both medicines work best alongside a calorie-controlled diet and regular physical activity.
Mounjaro Side Effects & Tolerance
Both injections can cause temporary nausea, bloating, or fatigue, particularly during the first few weeks.
However, many patients find Mounjaro causes fewer appetite rebounds and milder long-term stomach discomfort once the correct dose is reached.
Cost Comparison in the UK
At PPRX Online Pharmacy, genuine Mounjaro KwikPens each contain four weekly doses (a 4-week supply):
| Strength | Duration | Price |
|---|---|---|
| 2.5 mg KwikPen | 4 weeks | £215 |
| 5 mg KwikPen | 4 weeks | £235 |
| 7.5 mg KwikPen | 4 weeks | £300 |
| 10 mg KwikPen | 4 weeks | £350 |
| 12.5 mg KwikPen | 4 weeks | £375 |
| 15 mg KwikPen | 4 weeks | £399 |
Wegovy is supplied as pre-filled pens containing a month’s doses, and UK prices typically range from £199 to £299 per month depending on strength and pharmacy.
Which One Should I Choose?
- Choose Mounjaro if you’ve used a GLP-1 medicine before but need stronger appetite control or improved blood-sugar stability.
- Choose Wegovy if you’re new to GLP-1 treatments and prefer single-receptor therapy or are sensitive to dual-action drugs.
Always consult a qualified prescriber before switching or starting treatment.
How to Get a Prescription Online
- Complete our secure Weight-Loss Consultation Form.
- A licensed prescriber reviews your answers.
- If suitable, your prescription is issued and dispensed by PPRX, a GPhC-registered UK pharmacy.
- Orders approved before 2 p.m. are shipped the same day for next-day delivery.
Start now → Buy Mounjaro KwikPen UK
FAQs
Can I switch from Wegovy to Mounjaro?
Yes, under prescriber guidance. A dose break or step-down may be recommended before changing.
Is Mounjaro better than Wegovy for weight loss?
Studies show Mounjaro can produce greater average weight reduction, though individual responses vary.
Do I need a prescription for either?
Yes. Both are prescription-only medicines reviewed by qualified UK prescribers.
Pharmacist Note
Content reviewed by a GPhC-registered pharmacist. All medical information aligns with MHRA and NICE guidance.
Start your order today at www.pprx.co.uk

At PPRX UK, we provide:
- Genuine Mounjaro pens, sourced directly from the manufacturer (Eli Lilly)
- Dispensing via a GPhC-registered UK pharmacy
- Professional consultations with UK pharmacists
- Ongoing support, dosage guidance, and repeat supply options
Whether you’re just starting or switching from Ozempic or Wegovy, we’re here to help.

📞 Get in Touch
Visit www.pprx.co.uk or contact us directly to begin your online consultation.
We offer fast, discreet UK-wide delivery and exceptional support throughout your journey.
Mounjaro is a prescription-only medicine. This article is for informational purposes only and does not replace medical advice. Always consult a qualified healthcare provider before starting treatment. nhs
