Mounjaro Injection Price UK: Costs, Comparisons & Where to Buy

If you’ve been researching weight loss injections, you’ve likely come across Mounjaro and wondered what it costs in the UK. Prices vary by pharmacy, dose, and discount codes, with Asda’s starting price of £148.97 for a 2.5mg pen being one of the cheapest entry points.

Starting price (Asda): £148.97 for 1 pen (4 doses) ·
Available dosages: 2.5mg, 5mg, 7.5mg, 10mg (plus 12.5mg, 15mg for maintenance) ·
Prescription required: Yes

Here are the key facts about Mounjaro pricing and availability.

How much is Mounjaro at Boots?

Boots Online Doctor sells Mounjaro pens at prices that sit near the upper end of the market. According to a WePrescribe comparison, Boots charges £176.97 for 2.5mg, £189.97 for 5mg, £267.97 for 7.5mg, £302.97 for 10mg, £314.97 for 12.5mg, and £334.97 for 15mg.

The pattern: Boots is consistently the most expensive option, so price-conscious patients should look elsewhere.

What is the price of Mounjaro 2.5mg at other pharmacies?

• Asda Online Doctor: £148.97 (cheapest single‑pen price) — WePrescribe comparison
• Superdrug Online Doctor: £179.99 for 2.5mg — WePrescribe comparison
• MedExpress: £179.99 for 2.5mg — Medino comparison
• UK Meds: £157.99 for 2.5mg — UK Meds

How much does Mounjaro cost at other pharmacies?

Independent comparison tools show a range of prices. Monj, a free UK comparison tool, lists discounted rates from GPhC‑registered pharmacies, with some offering 2.5mg pens as low as £109.00 (Bolt Pharmacy) through its discount price list.

Seven pharmacies, one pattern: Asda consistently offers the lowest starting price, while Boots and MedExpress sit closer to the market average. Discount codes from WePrescribe (10% off with WEPRES10) can bring the effective cost below £150 for 2.5mg.

Is Ozempic cheaper than Mounjaro?

Ozempic (semaglutide) is generally less expensive per month than Mounjaro, but both require a private prescription in the UK. Mounjaro (tirzepatide) typically costs between £180 and £280 per month across doses, while Ozempic runs approximately £150 to £200 per month, according to pharmacy listings.

Three rows, one pattern: Mounjaro offers greater weight loss potential at a higher cost — especially at maintenance doses. The trade-off: patients who prioritise savings over maximum efficacy may prefer Ozempic.

Can I get Mounjaro injections from my GP?

In most cases, your GP cannot prescribe Mounjaro directly for weight loss. NHS England’s guidance limits tirzepatide to specialist weight management services for patients with a BMI ≥35 and at least one obesity‑related condition.

Private prescription options

• Online consultation with a registered pharmacy (e.g., Asda Online Doctor, Superdrug Online Doctor) — UK Meds
• Private GP referral to a weight management clinic
• Cost of private prescription is included in the pen price at most online pharmacies

Online consultation process

You complete a health questionnaire, provide your weight and BMI, and a clinician reviews it. If approved, you receive the pen by post. WePrescribe notes that some pharmacies require a follow‑up check after the first month.

The implication: for most patients, private online pharmacies are the only practical route.

Where to inject Mounjaro?

Mounjaro is injected subcutaneously once a week. The recommended sites are the abdomen, thigh, or upper arm. Rotating sites each week helps prevent lipodystrophy and lumps.

How quickly does Mounjaro work?

Most people experience noticeable appetite suppression within the first week. Medino reports that significant weight loss is typically seen within 4–8 weeks. The effect builds as the dose increases.

Injection technique

1. Use a new needle each week
2. Do not inject into muscle or a vein
3. Pinch the skin, insert at 90°, press the button, hold for 5 seconds

The catch: proper technique is crucial for effectiveness and safety.

What foods should I avoid on Mounjaro?

Because Mounjaro slows gastric emptying, high‑fat, greasy, and spicy foods can trigger nausea, vomiting, and diarrhoea. Dietitians recommend avoiding fried foods, creamy sauces, and heavily processed snacks during the first few weeks.

Recommended diet during treatment

• Lean protein (chicken, fish, tofu)
• Non‑starchy vegetables
• Whole grains (oats, quinoa)
• Small, frequent meals to reduce gastric discomfort

How Mounjaro affects appetite and eating habits

The drug works by mimicking GLP‑1 and GIP hormones, which signal fullness and reduce hunger. Many patients find they eat smaller portions naturally. Staying hydrated is critical — dehydration worsens side effects.

What this means: diet adjustments can significantly improve tolerability.

What we know and what’s still unclear

The pattern: while confirmed facts are solid, future pricing and coverage remain uncertain.

Quotes from experts and pharmacy services

“Our prices start from £148.97 for a 2.5mg Mounjaro pen.”

— Asda Online Doctor

“New patients can save £30 on their first order using code WLNP30.”

— Superdrug Online Doctor

“Mounjaro is currently only recommended within NHS specialist weight management services for people with a BMI of 35 or more.”

— NHS England guidance

These quotes illustrate the range of options and restrictions.

Summary: The real cost of Mounjaro in 2026

Mounjaro injections in the UK cost anywhere from £148.97 to £335 per month, depending on the dose and pharmacy. The cheapest path is to start with Asda’s 2.5mg pen and use discount codes from providers like WePrescribe (10% off) or Superdrug (£30 off). For patients in the UK looking to manage weight with tirzepatide, the choice is clear: compare pharmacy prices before every order, or risk overpaying by £100 a month.

Related reading: Mounjaro price comparison · Mounjaro pen price comparison

Frequently asked questions