The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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Is 7.5mg Mounjaro Strong?
Yes, 7.5mg is considered a moderate-to-strong dose of Mounjaro (tirzepatide). It's the third dose tier in the UK titration schedule and represents a significant step up from the starting dose. Most people reach this dose around weeks 9–12 of treatment. Whether it's "strong" for you depends on your individual response, tolerance, and how your body reacts to the medication. This guide explains where 7.5mg sits in the dose progression and what it typically means for weight loss and side effects.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Where 7.5mg Sits in the Mounjaro Dosing Schedule
Mounjaro is prescribed as a once-weekly injection, and the standard UK dose progression follows this pattern:
- Weeks 1–4: 2.5mg (starting dose)
- Weeks 5–8: 5mg (first escalation)
- Weeks 9–12: 7.5mg (second escalation)
- Weeks 13–16: 10mg (third escalation)
- Weeks 17–20: 12.5mg (fourth escalation)
- Week 21+: 15mg (maximum maintenance dose)
The KwikPen delivery system makes this straightforward — each pen contains four weekly doses at the same strength, and you rotate to the next dose tier every 4 weeks, provided you've tolerated the previous dose. 7.5mg represents the midpoint of the titration journey — you're past the initial adjustment phase but not yet at maximum strength. Reaching 7.5mg typically means you've been on Mounjaro for 8–12 weeks.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Effectiveness and Side Effects at 7.5mg
At 7.5mg, Mounjaro's dual GIP and GLP-1 mechanism is becoming more pronounced. Clinical trial data from SURMOUNT-1 suggests that participants taking tirzepatide at higher doses (10mg and above) achieved average weight loss of around 19.5–20.9% of body weight — significantly more than lower doses. Individual results vary considerably, though, and side effects often plateau or begin to settle at this dose for many people. Gastrointestinal side effects (nausea, diarrhoea, constipation) are common during dose escalation but frequently improve as your body adapts. If you're experiencing tolerability issues at 7.5mg, your prescriber may hold you at this dose longer before escalating further.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
Will I definitely need to go up from 7.5mg Mounjaro?
No. Your prescriber may keep you at 7.5mg long-term if you're achieving good weight loss and tolerating it well. The maximum dose is 15mg, but many people stop at 10mg or 12.5mg. Dose escalation is individualised based on your response and how you're managing side effects.
Is 7.5mg Mounjaro the same strength as any Wegovy dose?
Not exactly. Mounjaro (tirzepatide) and Wegovy (semaglutide) are different medications with different mechanisms. Approximate equivalence suggests 7.5mg Mounjaro is similar in effect to around 1–1.7mg Wegovy, but any switch between medications must be managed by your prescriber.
How much weight loss should I expect at 7.5mg?
Individual results vary significantly. Clinical trials show variable outcomes depending on diet, exercise, and personal metabolism. Use our free GLP-1 weight loss calculator to get a projected range based on your starting weight and medication tier.
Will side effects be worse at 7.5mg than at 5mg?
Possibly during the transition, but many people find side effects stabilise or improve as their body adapts. Nausea, constipation, and reduced appetite are common but often manageable. Your prescriber can advise if adjustments are needed.
Can I stay on 7.5mg Mounjaro permanently?
Yes. Your GP or prescriber can maintain you at any dose that's working well for you. There's no requirement to escalate to maximum dose. Your UK prescription can continue at 7.5mg indefinitely if that's clinically appropriate. ```
Ready to take control of your weight loss journey?
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