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Mounjaro

Mounjaro

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Mounjaro is an injectable medicine used to help adults manage their weight, particularly those with obesity or overweight issues, alongside a healthy diet and exercise. It works by acting on hormones that control appetite and blood sugar, helping to reduce hunger and improve blood sugar levels.

  • Trials show approximately 20% body weight loss
  • Tirzepatide is active ingredient
  • Once weekly injection
Weight Loss
General Health
Was £159.99
£145.00
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Mounjaro

Strength: 2.5mg

Pack Size: 1

£159.99

£145.00
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Buy Mounjaro Weight Loss Medication Online

Mounjaro is a prescription weight loss treatment manufactured by Eli Lilly. It contains tirzepatide, an active ingredient belonging to a class of drugs called GLP-1 agonists. GLP-1 agonists regulate hunger and are released by the intestines after a meal.

By functioning similarly to GLP-1, Mounjaro helps control appetite, leading to a feeling of fullness and reduced hunger. This can result in consuming fewer calories and promoting weight loss. Combining Mounjaro with a reduced-calorie diet can further enhance its benefits.

When using Mounjaro pens to suppress appetite, patients typically experience a weight loss of approximately 15-20% of their initial body weight upon completing the treatment.

When to Use Mounjaro?

Mounjaro is intended for individuals with a body mass index (BMI) over 30, but you may be able to use it if you have a BMI over 27 with a weight-related health condition, including:

  • Type 2 diabetes
  • High cholesterol
  • Obstructive sleep apnea
  • High blood pressure

You'll need a prescription to access the medication, and healthcare professionals usually only provide it when you've tried other methods on your weight loss journey, including accessing specialist weight management services, consuming a healthy diet and exercise.

However, when combined with reduced calorie intake and exercise, people can experience impressive results on Mounjaro and enjoy sustainable weight loss.

Mounjaro Age Restrictions

Mounjaro is only suitable for adults over 18; a doctor won't prescribe it for younger people. However, there's medical help available for children and teenagers dealing with obesity and weight-related health problems.

How to Use Mounjaro Weight Loss Injections?

You inject Mounjaro under the skin (subcutaneously) in your stomach area, thigh or upper arm once a week using an injection pen. Don’t worry; it’s much easier than it sounds. If we prescribe Mounjaro for you, we’ll provide full instructions on how to use it.

Mounjaro Dosage

To allow your body to get used to the medicine and have the best chance for long-term success, you should follow the gently increasing dosage schedule as instructed.

Usually, you’ll start with a dose of 2.5 mg of Mounjaro, which will increase every four weeks (or as advised and if suitable for you) until you reach your maximum maintenance dose of 5mg, 10mg or 15mg.

When to Avoid Mounjaro?

Mounjaro (tirzepatide) is a potent medication, and it’s not suitable for everyone. If any of the following apply, you should avoid using Mounjaro:

  • Medullary Thyroid Carcinoma (MTC): If there’s a personal or family history of MTC, you shouldn't take Mounjaro as it can increase the risk of developing tumours.
  • Multiple Endocrine Neoplasia Syndrome Type 2: Individuals with MEN 2 should usually avoid Mounjaro or only use it if a medical professional says it’s safe to do so.
  • Allergies: If you’re allergic or sensitive to any of the ingredients in Mounjaro, it’s essential to avoid the injections, as they can cause severe reactions.
  • Type 1 Diabetes: Mounjaro is specifically for Type 2 Diabetes and weight loss. People with Type 1 Diabetes shouldn’t use it.
  • Pregnancy/Breastfeeding: While research hasn’t confirmed whether Mounjaro is safe during pregnancy or breastfeeding, it’s best to avoid it.

Mounjaro Precautions

There are also some situations where you should speak to a doctor before using Mounjaro, as it can carry some risks in individuals with:

  • A History of Pancreatitis: Mounjaro can inflame the pancreas, so your doctor will need to assess your health before prescribing it.
  • Gastrointestinal Disease: Mounjaro slows stomach emptying, and people with digestive problems could experience more severe symptoms.
  • Kidney Problems: Mounjaro can cause side effects that result in dehydration, increasing symptoms in people with kidney problems.
  • Diabetic Retinopathy: Mounjaro can worsen your vision if you have a condition like diabetic retinopathy.

You should also seek medical advice if you have an upcoming surgery, are taking diabetes medicines, and have gallbladder issues. Consuming alcohol is also not a good idea, as it can worsen the side effects of Mounjaro and affect your blood sugar levels.

Mounjaro Ingredients

Mounjaro contains the active ingredient of Tirzepatide, which is a dual GIP and GLP-1 receptor agonist. It slows stomach emptying, reduces appetite and regulates your blood sugar.

Inactive Ingredients (Excipients):

  • Sodium chloride
  • Water
  • Benzyl alcohol
  • Glycerol
  • Phenol
  • Sodium phosphate dibasic heptahydrate
  • Hydrochloric acid solution and a care provider or pharmacist.

Side Effects of Mounjaro

Mounjaro can cause some side effects to occur. Very common ones are gastrointestinal in nature:

  • Diarrhoea
  • Nausea
  • Vomiting
  • Constipation

These are mainly seen with dose increases, and tend to settle with time.

Other common side effects could include:

  • Fatigue
  • Feeling lightheaded
  • Excess wind (flatulence)
  • Gallstones
  • Gastroesophageal reflux
  • Injection site reactions
  • Hair loss
  • Hypoglycemia in patients with type 2 diabetes.

In rare cases, there can be serious side effects, such as:

Pancreatitis – if you develop severe abdominal pain, with or without persistent vomiting, this may be a sign of pancreatitis and you need to get medical help immediately.

Anaphylaxis – if you experience difficulty breathing, swelling of the face, lips or tongue and difficulty swallowing, you may be having a severe allergic reaction (anaphylaxis) and you must seek immediate medical help.

Mounjaro Patient Information Leaflet

Please read the Patient Information Leaflet with your medicine for full details on the side effects and how to use Mounjaro.

The user manual gives instructions on safely and effectively administering your medicine. It should be read in conjunction with the patient leaflet. If you're unsure whether Mounjaro suits your needs and want more information, please contact our registered pharmacists today.

Umar Razzaq, MPharm | University of Strathclyde, Clinical Pharmacist.
Content Written by:Umar RazzaqMPharm | University Of Strathclyde
Date Written:01/03/2024
Role:Clinical Pharmacist
Nish Fayyaz, MPharm | University of Strathclyde, Pharmacist.
Medically Reviewed By:Nish FayyazMPharm | University Of Strathclyde
Date Checked:30/05/2025
Role:Pharmacist
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