Cheapest Weight Loss Injections UK March 2026: Full Price Comparison

Here's the complete UK pricing landscape for weight loss injections as of March 2026. All prices are monthly estimates from private prescriptions — NHS prescriptions are free via medical exemption certificate.

WEGOVY (Semaglutide) — Weekly Injection: - 0.25mg (weeks 1-4): £135-170 - 0.5mg (weeks 5-8): £145-180 - 1mg (weeks 9-12): £155-195 - 1.7mg (weeks 13-16): £170-210 - 2.4mg (maintenance): £185-230 - 7.2mg (new high dose): £220-270

MOUNJARO (Tirzepatide) — Weekly Injection: - 2.5mg (weeks 1-4): £149-190 - 5mg (weeks 5-8): £185-240 - 7.5mg (weeks 9-12): £220-280 - 10mg (weeks 13-16): £260-320 - 12.5mg: £290-350 - 15mg (max): £310-375

SAXENDA (Liraglutide) — Daily Injection: - 0.6mg-3mg (titrated over 4 weeks): £100-150/month at maintenance

Winner by price at maintenance dose: Saxenda is cheapest (£100-150), Wegovy 2.4mg is mid-range (£185-230), Mounjaro is most expensive (£310-375). But Saxenda produces the least weight loss (~8% vs 15-22%).

The monthly medication price is only part of the picture. Here's what you'll actually pay:

Initial Setup Costs: - Private GP/clinic consultation: £50-150 - Baseline blood tests (HbA1c, lipids, liver, kidney, thyroid): £80-150 - Follow-up consultation at 4 weeks: £30-50

Ongoing Monitoring: - Blood tests every 3-6 months: £50-100 each - Follow-up consultations: £30-50 every 2-3 months - Annual total monitoring cost: £200-400

True Annual Costs (medication + monitoring): - Saxenda: £1,600-2,200/year - Wegovy 2.4mg: £2,600-3,200/year - Wegovy 7.2mg: £3,000-3,640/year - Mounjaro 15mg: £4,200-5,700/year

Cost per % body weight lost: - Saxenda: £200-275 per 1% weight loss - Wegovy 2.4mg: £173-213 per 1% weight loss - Wegovy 7.2mg: £145-176 per 1% weight loss - Mounjaro 15mg: £186-252 per 1% weight loss

On a cost-per-result basis, Wegovy 7.2mg actually offers the best value in 2026.

1. NHS Route (Free): If you meet the criteria (BMI ≥35, or ≥30 with comorbidities), ask your GP for a Tier 3 weight management referral. NHS prescriptions are free. The wait is long (6-24 months) but the lifetime saving is enormous. Some areas have shorter waits — call your local service directly.

2. Subscription Plans: Several online pharmacies offer monthly subscription plans with discounts: Pharmacy Planet, Simple Online Pharmacy, The Care Pharmacy, and Manual all offer 5-15% discounts for 3-6 month commitments.

3. Dose Optimisation: Not everyone needs the maximum dose. If you're achieving good results on a lower dose, don't escalate unnecessarily. Wegovy 1.7mg is significantly cheaper than 2.4mg and some patients maintain weight loss at this level.

4. Switching Medications: If you're on Mounjaro, consider switching to Wegovy — the clinical difference is small but the cost saving is real. Discuss with your prescriber.

5. Prescription Discount Cards: Some pharmacies accept prescription discount cards or offer loyalty programmes. Always ask.

6. Employer Health Benefits: Some UK employers now cover weight management medications through private health insurance or workplace wellness programmes. Check with your HR department.

*This pricing information is updated monthly. All weight loss medications require a valid prescription and medical supervision.*

NHS Route: - Cost: Free (prescription charge exempt) - Eligibility: BMI ≥35 (or ≥30 with weight-related conditions) - Waiting time: 6-24 months via Tier 3 referral - Medications available: Wegovy, Mounjaro (varies by area), Saxenda - Monitoring: Included in NHS care - Pros: Free, comprehensive care package including dietitian and psychologist - Cons: Long wait, eligibility restrictions, may not get your preferred medication

Private Route: - Cost: £1,600-5,700/year depending on medication - Eligibility: BMI ≥30 (some clinics accept ≥27) - Waiting time: Usually within 1-2 weeks - Medications available: All MHRA-approved options - Monitoring: Extra cost (blood tests, consultations) - Pros: Fast access, choice of medication, flexible - Cons: Expensive, quality of oversight varies between providers

Hybrid Approach: Start privately for immediate access, then transfer to NHS care when your referral comes through. Many patients use this strategy to avoid the wait while keeping long-term costs manageable.

*Weight loss medications are most effective when combined with dietary changes, increased physical activity, and behavioural support — regardless of whether you access them privately or through the NHS.*