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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Weight Loss Classes and Medication Options in Oldham
If you're looking for weight loss support in Oldham, you have several options available. Beyond traditional weight loss classes, prescription weight management medication is now available to eligible adults across the UK. This guide explains what's available through the NHS, private prescribing, and how to find out if you're eligible for medication-based support. We'll also cover how to have a conversation with your GP about your options and what to expect.
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Calculate Your BMI Instantly
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.
UK-Licensed Prescription Weight Loss Medications
For eligible adults in the UK, three prescription-only medications are licensed for weight management. Mounjaro (tirzepatide) is a once-weekly injection that activates two natural hormone pathways (GIP and GLP-1), helping to regulate appetite and support feeling fuller after meals. Wegovy (semaglutide) is also a once-weekly GLP-1 injection with strong clinical evidence for weight loss support. Saxenda (liraglutide) is a daily GLP-1 injection option.
You may be eligible if you have a BMI of 30 or above, or a BMI of 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds may apply. Use our free BMI calculator to check your personal BMI and eligibility starting point. Clinical trials showed these medications can support an average weight loss of 15–21% of body weight when combined with lifestyle changes—though individual results vary significantly.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
NHS vs Private Access in Oldham and the UK
NHS access: You can ask your GP for a referral to a specialist weight management service (tier 3). These services assess your health and may prescribe weight loss medication if appropriate. NHS availability and waiting times vary by region—some areas have long waiting lists. Contact your local Integrated Care Board (ICB) to find out what's available in Oldham.
Private access: You can also access these medications through GPhC-registered online prescribing services. A UK-licensed prescriber reviews your health information and issues a prescription if suitable. This avoids NHS waiting lists but involves a private cost. Either way, a clinical assessment is required before any prescription is issued. Our GLP-1 weight loss calculator can help you explore projected outcomes at different doses.
The first step is to speak with your GP about weight loss management. They can discuss all available options—lifestyle support, weight loss classes in your local area, and whether prescription medication might be right for you. Be honest about your weight loss goals, any previous attempts, and your overall health. Your GP can also check for any medical conditions that might affect which treatment is suitable. If NHS specialist services have long waiting lists in your area, ask about private prescribing as an alternative. Track your progress using our free progress tracker once you start any treatment.
- 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.
Are weight loss injections available on the NHS in Oldham?
Yes, but access is through specialist tier 3 weight management services, not routine GP prescription. Waiting times vary. Ask your GP for a referral or contact your local Integrated Care Board to find out current availability and waiting times in Oldham. Some people also choose private prescribing to avoid NHS waiting lists.
How do I know if I'm eligible for prescription weight loss medication?
You're likely eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions like diabetes or high blood pressure. Use our free BMI calculator to check your starting BMI. A GP or prescriber will do a full health assessment before deciding if medication is suitable for you.
What's the difference between Mounjaro, Wegovy, and Saxenda?
All three are prescription-only GLP-1 medications licensed for weight management in the UK. Mounjaro is a dual GIP/GLP-1 agonist, while Wegovy and Saxenda are GLP-1 only. Mounjaro and Wegovy are once-weekly injections; Saxenda is a daily injection. Clinical evidence supports all three, though results vary between individuals.
Can I get weight loss medication privately if NHS waiting times are long?
Yes. GPhC-registered online prescribing services offer private consultations and can issue prescriptions without an NHS referral. You'll need a clinical assessment, and costs vary (typically £100–£300+ per month depending on dose). Always verify the prescriber is UK-licensed and the pharmacy is GPhC-registered.
How long does it take to see weight loss results?
Most people notice changes within the first 4–8 weeks. Weight loss continues over months—clinical trials show meaningful results over 68–72 weeks. Results depend on your dose, adherence, and how much you combine medication with reduced-calorie diet and increased physical activity. Every person's journey is different.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.