• Curbs cravings & restores control over eating habits 
  • Proven to help patients lose up to 15–20% of body weight in clinical studies
  • Boosts energy, confidence, and long-term health

How it works?

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Overview

Mounjaro is a next-generation breakthrough in medical weight loss. Unlike older treatments that target just one pathway, Mounjaro works on two powerful hormones (GLP-1 and GIP) to control appetite, slow digestion, and stabilise blood sugar. The result? A treatment that not only reduces hunger but makes it easier to feel satisfied with smaller portions — helping you achieve steady, long-lasting weight loss.

In clinical trials, patients using Mounjaro achieved an average of 15–20% body weight reduction — results that go beyond anything previously seen with licensed weight loss medicines. Many notice appetite changes within weeks, with visible improvements developing steadily over months.

But Mounjaro is about more than numbers on the scale. By helping you take back control of eating habits, it can boost energy levels, improve health markers, and restore confidence. Taken once a week with a simple pre-filled injection pen, Mounjaro is convenient, effective, and represents the future of weight loss medicine.

Available through SwiftMedi following a secure online consultation with a UK-registered prescriber, your treatment will be dispensed from our UK-regulated pharmacy and delivered quickly and discreetly to your door.

Directions

Administration: Injected once weekly under the skin (abdomen, thigh, or upper arm).


Dosing schedule: Treatment begins with a lower dose, which is gradually increased every 4 weeks under prescriber guidance.


Ease of use: Pre-filled injection pens are designed for safe and simple use at home.


Duration: For best results, Mounjaro should be continued long-term, alongside diet and lifestyle changes.

Side Effects

Most people tolerate Mounjaro well, particularly when doses are increased gradually. Side effects, if they occur, are usually mild and improve with time.

Common (may affect up to 1 in 10 people):

  • Nausea or feeling sick
  • Diarrhoea or constipation
  • Reduced appetite
  • Indigestion or bloating


Less common (may affect up to 1 in 100 people):

  • Vomiting
  • Abdominal pain
  • Fatigue
  • Redness or itching at the injection site


Rare but serious (seek urgent medical help):

  • Severe abdominal pain (possible pancreatitis)
  • Signs of allergic reaction (rash, swelling, difficulty breathing)


Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet before use. If you notice anything unusual or concerning, seek medical advice promptly. In an emergency, call 999 or go to A&E.

Warnings

Mounjaro is not suitable for everyone. You should not use it if you:

  • Have a personal or family history of medullary thyroid cancer
  • Have multiple endocrine neoplasia syndrome type 2 (MEN2)
  • Are pregnant or breastfeeding
  • Have severe gastrointestinal disease or pancreatitis


Your prescriber will review your medical history to make sure treatment is safe and appropriate.

Frequently asked questions

  • What is Mounjaro and what is it used for?

    Mounjaro is a once-weekly injection used to support weight loss in adults with obesity or overweight and health risks. It contains tirzepatide, which also treats type 2 diabetes. A clinician checks your medical history to confirm it is appropriate as part of your weight loss plan.

  • How does Mounjaro help with weight loss?

    Mounjaro works by mimicking two natural hormones that reduce appetite and help control how your body handles food. This supports smaller meals and fewer cravings, making it easier to maintain a calorie deficit. Most people find it works best alongside healthy lifestyle changes.

  • Who can use Mounjaro for weight loss?

    Mounjaro is usually offered to adults with a BMI over 30, or above 27 if they have a weight-related condition such as high blood pressure or type 2 diabetes. A prescriber assesses your health, medicines and safety factors before recommending it.

  • How do I take Mounjaro and where do I inject it?

    You inject Mounjaro once a week into the skin of your tummy, thigh or upper arm. Choose a new site each week and take your dose on the same day for consistency. Your prescriber will show you how to use the pen safely.

  • What is the starting dose of Mounjaro?

    Most people start with 2.5 mg once weekly for four weeks. The dose then increases gradually through 5 mg, 7.5 mg, 10 mg, 12.5 mg and up to 15 mg. This slow increase helps reduce side effects and allows your body to adjust.

  • What side effects can Mounjaro cause?

    Common side effects include nausea, constipation, diarrhoea, indigestion and reduced appetite. These usually settle as your body adapts. Your clinician checks for any conditions or medicines that may increase your risk of side effects before prescribing.

  • Who should not use Mounjaro?

    Mounjaro is not suitable if you are pregnant, breastfeeding, under 18, or have certain medical conditions such as severe stomach disease or a personal or family history of thyroid cancer. A prescriber will review your medical background carefully.

  • How long does Mounjaro take to work?

    Many people notice changes in appetite within a few weeks, with weight loss building steadily over several months. Studies show significant benefit when the injections are combined with balanced meals, regular activity and good routines.

  • Can I use Mounjaro if I don’t have diabetes?

    Yes. Mounjaro is licensed for weight loss in people without diabetes if they meet the BMI and health-risk criteria. Your prescriber will check that it is the right option and ensure it is safe alongside any other medicines.

  • Do I need a specific diet while taking Mounjaro?

    You don’t need a strict diet, but eating smaller, balanced meals helps manage nausea and supports better results. Protein-rich foods and higher-fibre meals can improve comfort and keep your appetite steady during treatment.

  • Is Mounjaro safe for long-term use?

    Current evidence suggests Mounjaro is safe when used long term with proper monitoring. Your clinician reviews your progress, side effects and dose changes regularly to ensure the treatment continues to be suitable.

  • Can I drink alcohol while taking Mounjaro?

    Yes, you can drink alcohol, but it may worsen nausea or digestive symptoms, especially in the early weeks. If you have diabetes, alcohol can also increase the risk of low blood sugar, so moderation is advised.

  • What should I do if I miss a Mounjaro dose?

    If you are within four days of your usual dosing day, take the missed dose when you remember. If more than four days have passed, skip it and take your next dose on your normal day.

  • Can I use Mounjaro during pregnancy or breastfeeding?

    No. Mounjaro should not be used during pregnancy or breastfeeding, and you should stop it before trying to conceive. Your clinician can discuss safer alternatives if you are planning pregnancy.

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