Discover everything you need to know about Mounjaro, a leading weight loss injection in the UK, designed to support your journey with effective results.

What is Mounjaro?

Mounjaro is a prescription-only injectable treatment featuring tirzepatide, approved by the UK’s Medicines and Healthcare products Regulatory Agency (MHRA) for managing weight and type 2 diabetes. By mimicking the natural hormones GLP-1 and GIP, it helps control appetite and blood sugar, promoting lasting weight loss when paired with a balanced diet and regular exercise. Clinical research, including the SURMOUNT-1 and SURMOUNT-5 trials, indicates users can achieve weight reductions of up to 20.2–22.5% over 72 weeks at the highest 15mg dose.

How Mounjaro Supports Weight Loss

Mounjaro influences brain regions that regulate hunger, curbing cravings and slowing digestion to enhance satiety. Its dual-hormone approach may outperform single-hormone options like Wegovy, delivering average losses of 21% compared to Wegovy’s 15% over similar timelines. Individual responses differ, with some noticing effects within days, peaking 24–72 hours after injection.

Starting Your Mounjaro Journey

Dosage Breakdown

• Initial Phase: Begin with 2.5mg weekly for 4 weeks to ease into the treatment.
• Gradual Increase: After 4 weeks, move to 5mg, with optional 2.5mg increments every 4 weeks, up to 15mg, based on your progress and prescriber’s advice.
• Flexible Options: Staying at a lower dose is possible if effective—consult your healthcare provider for adjustments.

When Will You See Results?

Effects vary, with some experiencing appetite changes within a day at 2.5mg, while others may need higher doses. The most noticeable impact typically occurs 2–3 days post-injection as the medication reaches its peak.

Managing Your Calorie Intake

Tracking calories is optional but beneficial. Calculate your Total Daily Energy Expenditure (TDEE) to set a maintenance level and a deficit (e.g. 500–1,000 calories daily) for weight loss. Tools like MyFitnessPal or Me360 can simplify this process.

Access and Eligibility

Am I Eligible and is Mounjaro Covered by the NHS?

Mounjaro is typically prescribed for:

• Adults with type 2 diabetes who have not achieved adequate blood sugar control with diet, exercise, or other medications.
• In some cases, individuals with a BMI of 30 or higher (or 27 with weight-related health conditions) for weight management, under medical supervision.
• Patients must undergo a medical assessment to confirm suitability, as Mounjaro is not suitable for type 1 diabetes or those with certain medical conditions, such as medullary thyroid carcinoma or severe gastrointestinal issues.

Since June 2025, Mounjaro is available on the NHS for weight loss, but eligibility is limited to those with a BMI of 40 or above and at least four related health conditions (e.g. high blood pressure, diabetes).

Where to Purchase Mounjaro

Mounjaro is accessible via private prescriptions at UK pharmacies, both physical and online. Look for the General Pharmaceutical Council (GPhC) logo, registration number, and HTTPS security. Trusted providers include Boots Online Doctor, Asda Online Doctor, Oushk Pharmacy and Pharmacy2U, often offering next day delivery after consultation.

Navigating Challenges

Common Side Effects

Most users encounter minimal or no side effects, such as nausea or constipation, which are typical when starting or adjusting doses and usually fade within weeks. Serious but rare issues like anaphylaxis (breathing difficulties, swelling) or pancreatitis (intense abdominal pain) require immediate medical attention. Over-the-counter solutions may ease mild symptoms. Always seek advice from your GP or prescriber.

Overcoming Weight Loss Stalls

A healthy weight loss goal is 1–2 lbs (0.45–0.9 kg) per week. Plateaus are common as initial losses (often water weight) taper off. Reassess your TDEE, monitor calorie intake to maintain a deficit, and stay patient. If progress halts, discuss a dose increase with your prescriber.

Monitoring Your Progress

Anticipated Weight Loss

• Early Progress: Up to 6% body weight reduction within 12 weeks, with higher initial drops due to dietary shifts and water loss.
• Long-Term Goals: Average losses of 20.2–22.5% over 72 weeks at the maximum dose, though results vary by individual.

Handling Mounjaro

Safe Disposal of Pens and Needles

• Needles: Dispose of used needles in the provided sharps bin, handling with care to avoid injury. Return full bins to your supplier or follow local council guidelines via Gov.uk (use your postcode).
• Pens: Empty pens can be discarded in household waste; those with remaining medication should be returned to a pharmacy.

Packaging

• Ice Packs: Dispose in regular waste, draining contents if needed.
• Wool Wrapping: Repurpose for insulation or return 5+ packs to the manufacturer via DPD for recycling.

Storage Guidelines

• Unopened Pens: Keep refrigerated at 2°C–8°C, avoiding freezing.
• In-Use Pens: Store at room temperature (up to 30°C) for up to 30 days, then discard.
• Inspection: Avoid using if expired, damaged, cloudy, discoloured, or containing particles. Consult your pharmacist for unused disposal.

Key Considerations

Mounjaro is a long term commitment, not an instant solution, with success tied to lifestyle adjustments. Medeazy offers general information only and is not responsible for medical advice. For personalised support on side effects, dosages, or switching treatments (e.g. to Wegovy), consult your GP or healthcare professional. Stay informed about price changes and availability through MedEazy.