Compare Weight-Loss Treatments Prices UK Safely

Independent comparison of regulated online pharmacies providing GLP-1 prescription weight management treatments in the UK.

All treatments require a consultation and prescription approval from a qualified prescriber.

GPhC Registered Pharmacies Only
Updated Weekly
Medically Reviewed
Live Lowest Prices (4-week supply)
Mounjaro 2.5mg
Starting from
Save up to £98 a month
£131.00
/ month
£229.00
Wegovy 0.25mg
Starting from
Save up to £125.01 a month
£79.99
/ month
£205.00
Saxenda 5 Pens
Starting from
Save up to £25 a month
£210.00
/ month
£235.00
View full comparison table →
Listed prices from verified UK pharmacies, excluding consultation and delivery fees. The struck-through amount is the highest price recorded across compared pharmacies, not a previous price. Last checked August 12, 2026.

How PenCompare Works

Real World Savings Example
Most expensive listed price
Mounjaro 2.5mg (4 weeks)
£229.00
Lowest listed price
Mounjaro 2.5mg (4 weeks)
£131.00
£1,277.50
Potential difference per year at this dose
Based on listed prices from 64 verified UK pharmacies, excluding consultation and delivery fees. The yearly figure is the gap between the highest and lowest price scaled to twelve months, not a guaranteed saving. Costs change as doses are adjusted. Last checked August 12, 2026.

About PenCompare

PenCompare is an independent UK comparison website that helps you review pricing for prescription-only weight loss injections available through GPhC-registered online pharmacies.

We analyse publicly available pharmacy pricing, consultation requirements and delivery options so you can understand the full treatment cost before beginning an online consultation.

PenCompare does not sell medication and does not provide medical advice. We provide pricing comparisons and educational information to support informed decision-making.

View Full Comparison


Our Services

Online Pharmacy Service Comparison.

We provide a comprehensive comparison of UK online pharmacies, ensuring you have all the information needed to make safe and informed decisions about your weight loss treatment.

Typical Monthly Medication Cost

Compare prices for Mounjaro, Wegovy & more from £149/month

Consultation Fees

Most providers offer free online consultations with prescription

Delivery Charges & Timeframes

Next-Day delivery options available from top pharmacies

Prescription Requirements

Valid UK prescription required (included in consultation)

Pharmacy Regulatory Status

All listed providers are GPhC registered & regulate

Our Methodology

How We Verify
Online Pharmacies

We go beyond simple price comparisons. Our team conducts rigorous checks to ensure every provider listed meets the highest UK safety standards.

Evaluation Criteria
  • GPhC Registration Check
  • Hidden Fees Analysis
  • Cold-Chain Compliance
  • Prescriber Verification

Important Medical Information

Prescription weight loss injections in the UK are classified as Prescription Only Medicines (POM) and are only available following approval from a registered healthcare professional.

Eligibility is strictly based on body mass index (BMI) and medical history. Treatment is not guaranteed for all applicants.

Always consult a qualified healthcare professional before starting any medication.

WHY USE PENCOMPARE

Our goal is to improve pricing transparency within the UK online pharmacy market, helping you make informed decisions safely.