Weekly injection, tirzepatide
Mounjaro weight loss injection
Mounjaro is a weekly tirzepatide injection. One KwikPen holds four doses, a month of treatment. The medicine works on two appetite hormones, so you feel full sooner and stay full longer.
£139a month, one pen with four weekly doses
Starter dose, weeks 1 to 4
Start with MounjaroFree health check. You pay nothing until a prescriber approves. Everyone starts on the lowest dose unless switching from another provider.
- UK prescriber review
- GPhC registered pharmacy
- Tracked delivery included
In short: Mounjaro (tirzepatide) is a once-weekly injection in six doses from 2.5 mg to 15 mg. At Able Clinic the 2.5 mg starter dose costs £139 a month and the 15 mg dose costs £249 a month. Average weight loss reached up to 21% at 72 weeks in the SURMOUNT-1 trial.
How Mounjaro works
Your gut releases GLP-1 and GIP after you eat. These hormones tell your brain you are full and slow the speed food leaves your stomach.
Tirzepatide copies both hormones and lasts a full week. Hunger drops, portions shrink, and cravings between meals fade for most people. Many describe the constant "food noise" going quiet.
The medicine supports change and does not replace your own habits. Protein at each meal, regular movement and good sleep protect your muscle and help results last. Read the protein guide and the exercise guide.
Mounjaro doses and prices
Everyone starts at 2.5 mg. Each step lasts at least 4 weeks. You move up only when you and your prescriber agree.
| Dose | Stage | Price a month | Price per weekly dose |
|---|---|---|---|
| 2.5 mg | Starter dose, weeks 1 to 4 | £139 | £34.75 |
| 5 mg | First maintenance dose | £169 | £42.25 |
| 7.5 mg | Optional step | £189 | £47.25 |
| 10 mg | Maintenance dose | £209 | £52.25 |
| 12.5 mg | Optional step | £229 | £57.25 |
| 15 mg | Highest dose | £249 | £62.25 |
Missed a dose? Take your dose within 4 days (96 hours). After 96 hours, skip the dose and continue on your usual day. See the missed dose guide and the full Mounjaro dose schedule.
What your monthly price includes
No joining fee, no consultation fee and no contract.
- Prescriber reviewA UK prescriber reads every order. If treatment is wrong for you, you pay nothing.
- Monthly check-insA short review before each new pen or pack keeps your dose right and catches problems early.
- Unlimited messagingMessage the clinical team from your account. A clinician replies, usually the same day.
- Tracked deliveryPlain packaging and a tracked courier, usually within 48 hours of approval. Pens travel chilled.
- Needles and sharps binFirst orders of injectable treatment include needles and a sharps bin at no extra cost.
- Maintenance planningNear your goal, your prescriber plans the maintenance phase with you at no added charge.
How to use your Mounjaro pen
- 1
Prepare
Wash your hands. Attach a new needle. Prime a new pen before the first dose, following the leaflet.
- 2
Choose a site
Stomach, thigh or the back of the upper arm. Change the spot each week. See the injection guide.
- 3
Inject
Turn the dose knob until the dose shows. Press and hold, then count slowly to 5 before removing.
- 4
Dispose
Put the used needle in your sharps bin. Recap the pen and return the pen to the fridge.
Side effects and safety
Common and usually short-lived
Nausea, most often after a dose increase. Constipation or diarrhoea, reflux, tiredness and redness where you inject. Smaller meals, slower eating, less fat and plenty of water ease most of these.
Full side effects guideGet urgent help
Severe stomach pain reaching your back, pain under your right ribs with fever or yellowing skin, swelling of the face or throat, or vomiting so severe you keep no fluids down. Call 999 or go to A&E. For other concerns call 111.
Tell your prescriber about
Diabetes medicines (especially insulin or gliclazide), the contraceptive pill or HRT tablets, planned surgery with sedation, past gallbladder, kidney or pancreas problems, and any plans to become pregnant.
Report any suspected side effect through the MHRA Yellow Card scheme. Read the patient leaflet in your pack before your first dose.
Who can start Mounjaro
Your prescriber makes the final decision after your health check.
Usually suitable
- Aged 18 to 75
- BMI of 30 or above
- BMI of 27 or above with a weight-related condition, such as high blood pressure
- Lower BMI thresholds can apply for some ethnic backgrounds
Not suitable
- Pregnant, breastfeeding or trying to conceive
- History of pancreatitis
- Personal or family history of medullary thyroid cancer or MEN2
- Type 1 diabetes, or a current eating disorder
Mounjaro questions
How much does Mounjaro cost a month?
At Able Clinic, Mounjaro costs £139 a month for 2.5 mg, £169 for 5 mg, £189 for 7.5 mg, £209 for 10 mg, £229 for 12.5 mg and £249 for 15 mg. The price covers the pen, prescriber review, monthly check-ins and tracked chilled delivery.
Can I travel with my pen?
Yes. Carry the pen in hand luggage with your prescription label. An in-use pen can stay out of the fridge for up to 30 days below 30°C. Read the travel guide.
Can I drink alcohol?
No direct interaction exists, yet alcohol can worsen nausea and reflux. Many people find they want less. See the alcohol guide.
What if I stop losing weight?
Plateaus are normal. Your prescriber reviews your dose, protein intake and activity before changing anything. Read breaking a plateau.
How long will I stay on treatment?
Many people continue for a year or more. We review your plan every month and agree a maintenance approach once you reach your goal.
Does Mounjaro affect the contraceptive pill?
Mounjaro can reduce absorption of the pill. Use a barrier method for 4 weeks after starting and after each dose increase, or ask your GP about a non-oral method.
Mounjaro guides
Other plans
Check if treatment suits youFree health check. You pay nothing until a prescriber approves.
Check your eligibilityAbout this page
- Written by
- Able Clinic editorial team
- Clinical review
- Pharmacy team at Curb Healthcare Ltd, GPhC 9012581
- Last reviewed
Each page is checked against the UK licence for the medicine. Read our editorial policy.