Mounjaro (Tirzepatide)
Struggling to lose weight despite making changes to your diet and activity levels? Mounjaro is a prescription weight loss treatment designed to support men when lifestyle changes alone haven’t been enough.
Mounjaro contains tirzepatide and is taken as a once-weekly injection using a simple self-injecting pen. It works with the body’s natural appetite hormones to help reduce hunger and curb cravings, making it easier to stay on track.
Order Mounjaro online after a free medical consultation, with discreet next-day delivery if approved.
- Once-weekly injection using a simple, self-administered pen
- Clinically proven to support effective weight loss
- Supplied with all necessary needles for your prescribed course
- Helps increase feelings of fullness and reduce food cravings
- Belongs to the same medication group as Wegovy
OverviewOverview
Mounjaro (tirzepatide) is a prescription-only injectable treatment prescribed to men who have struggled to achieve weight loss through lifestyle changes alone.
It is provided in a pre-filled pen and is administered once a week via an injection under the skin, making it suitable for fitting into a consistent routine.
The medication works by mimicking two hormones, GIP and GLP-1, which are involved in regulating appetite and blood glucose levels. By helping to curb appetite, reduce urges to eat between meals, and slow digestion, Mounjaro can assist with gradual and sustained weight loss when combined with healthy eating and regular movement.
Key points
- Available by prescription only after completion of a free online medical assessment
- Taken once weekly using an easy-to-use injection pen
- Supported by clinical research in adults with obesity or associated health risks
- Intended for use in adults aged 18 and over, subject to prescriber approval
- Studies show weight loss benefits when used alongside lifestyle adjustments, although outcomes vary between individuals
Patient Information Leaflet
For full details on safe use, side effects, and ingredients, read the official Mounjaro Patient Information Leaflet before starting treatment.
Warnings
Mounjaro is not suitable for all patients.
Inform your prescriber if you:
- Have previously experienced pancreatitis
- Have significant digestive conditions or delayed gastric emptying
- Have eye-related conditions, including diabetic retinopathy
- Are currently using insulin or a sulphonylurea to manage diabetes
- Are pregnant, breastfeeding, or planning to become pregnant
Women who use oral contraceptives should use an additional barrier method, such as a condom, for 4 weeks after starting Mounjaro and following each dose increase.
It is important to maintain adequate hydration while using this medication. Your suitability for treatment will be assessed during the online consultation.
Directions of Use
Mounjaro is taken as a once-weekly injection under the skin. To help maintain consistent levels of the medication in your body, it should be administered on the same day each week.
You will be provided with instructions on how to use the pre-filled KwikPen correctly. If you are unsure at any point, support is available to guide you through the process.
How to Use
- Select an injection area
Inject into the abdomen, thigh, or upper arm. Rotate injection sites each week to minimise skin irritation. - Check and prepare the pen
Remove the pen from its packaging and ensure it is undamaged and within its expiry date. Follow the preparation steps provided with your medication. - Administer the injection
Inject under the skin as instructed. Mounjaro can be taken at any time of day and does not need to be taken with food. - Dispose of the pen
Each pen is for single use only. Dispose of it safely after use, following the guidance in your patient information leaflet.
Dosage Schedule
Treatment usually starts at a lower dose to allow your body to adjust. The dose may be increased gradually over time, depending on how well you tolerate the medication.
Any changes to your dosage will be determined by a UK-registered prescriber. You should not alter your dose unless advised as part of your treatment plan.
Ingredients
Active ingredient
Tirzepatide (strength depends on the pen supplied)
Other ingredients
Sodium phosphate heptahydrate, water for injections, benzyl alcohol, phenol, glycerol, sodium chloride, hydrochloric acid (concentrated), and sodium hydroxide (used to adjust pH levels).
For a full list of ingredients, refer to the Mounjaro Patient Information Leaflet. If you have any known allergies, speak to a pharmacist before starting treatment.
Alternatives
There are other prescription options available to support weight management. An Online Mens Clinic prescriber will help identify the most appropriate treatment for you during your free online consultation.
Common alternatives
- Wegovy (semaglutide) – A once-weekly injection from the same GLP-1 medication class as Mounjaro
Saxenda (liraglutide) – A daily injectable treatment designed to help reduce appetite - Orlistat – Oral capsules that work by limiting the amount of fat absorbed from food
- Mysimba – Oral tablets that act on appetite control centres in the brain
Side Effects
As with all medicines, Mounjaro may cause side effects, although many people do not experience any.
Common (may affect up to 1 in 10 people)
- Nausea, vomiting, or abdominal discomfort
Indigestion, heartburn, or excessive burping - Reduced appetite
- Diarrhoea or constipation
- Fatigue or light-headedness
Less common and very serious
- Gallstones or inflammation of the gallbladder
- Kidney-related complications
- Symptoms of pancreatitis, such as severe abdominal pain with nausea or vomiting
Seek urgent medical attention if you develop intense or persistent stomach pain or signs of pancreatitis. A complete list of possible side effects can be found in the Patient Information Leaflet.
FAQs
What is Mounjaro and how does it work for weight loss?
Mounjaro contains tirzepatide, a prescription medicine that acts on two naturally occurring hormones, GLP-1 and GIP. These hormones play a key role in regulating appetite and blood sugar. By targeting both pathways, Mounjaro can reduce hunger, curb cravings, slow stomach emptying, and help you feel fuller after meals. When combined with a balanced diet and regular exercise, this can support meaningful and sustained weight loss.
Who can take Mounjaro?
Mounjaro is licensed for adults aged 18 and over who have a BMI of 30 or above, or a BMI of 27 or above alongside a weight-related health condition such as high blood pressure, high cholesterol, or type 2 diabetes. Eligibility is confirmed after a free online consultation, which is reviewed by an Online Mens Clinic prescriber.
How much weight can I lose with Mounjaro?
Clinical trials have shown that men using Mounjaro alongside diet and exercise can lose around 15–20% of their starting body weight over several months. Results vary depending on the dose prescribed, adherence to lifestyle changes, and individual response to treatment. Some men see faster progress, while others experience steadier, more gradual weight loss.
How do you take Mounjaro?
Mounjaro is taken as a once-weekly injection using a pre-filled pen. The injection is self-administered under the skin of the abdomen, thigh, or upper arm. Each pen is supplied with needles and detailed instructions to support safe and correct use.
What is the recommended Mounjaro dosage?
Treatment typically starts at 2.5 mg once weekly and is increased every four weeks to 5 mg, 7.5 mg, 10 mg, 12.5 mg, and up to a maximum maintenance dose of 15 mg, if tolerated. Your prescriber will tailor the dosage schedule based on your progress and any side effects you experience.
How quickly does Mounjaro start working?
Some men notice reduced appetite within the first few weeks of starting treatment. Visible weight loss is more commonly seen after 4–8 weeks and may continue as the dose is increased and maintained over time.
Is Mounjaro the same as Wegovy or Ozempic?
Mounjaro belongs to the same GLP-1 medication family as Wegovy and Ozempic but also activates GIP, a second hormone involved in appetite regulation. This dual action may explain why some clinical trials have shown greater weight loss with Mounjaro. Your prescriber can help you decide which treatment is most appropriate for you.
Can I drink alcohol while taking Mounjaro?
Alcohol is not strictly prohibited, but drinking can increase the risk of low blood sugar and may worsen digestive side effects such as nausea or reflux. It’s best to limit alcohol intake and speak to your prescriber if you have any concerns. You can also read our guide on Mounjaro and alcohol for more detailed advice.
What happens if I miss a Mounjaro dose?
If your injection is less than four days late, take it as soon as possible and then continue with your usual schedule. If more than four days have passed, skip the missed dose and take your next injection on your normal scheduled day.
How should Mounjaro pens be stored?
Unopened pens should be stored in the fridge at 2–8°C. After first use, pens can be kept at room temperature for up to 21 days if needed. Do not freeze the pens or expose them to direct sunlight. Read our full Mounjaro storage guide for more details.
Do I need to follow a special diet with Mounjaro?
There is no specific diet you must follow, but eating balanced meals and staying physically active will improve results and help maintain weight loss over the long term.
What if I have type 2 diabetes?
Mounjaro can help improve blood sugar control in people with type 2 diabetes. If you also use insulin or other diabetes medications, your prescriber may need to adjust your doses to reduce the risk of low blood sugar.
How do I get Mounjaro in the UK?
Mounjaro is available by prescription only from a UK-registered prescriber. With Online Mens Clinic, you complete a free online consultation. If approved, the medication is dispensed by a registered pharmacy and delivered discreetly, usually with next-day delivery.
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