💊 GLP-1 Drugs
Wegovy (Semaglutide) for Weight Loss — Complete UK & USA Guide (2026)
How Wegovy works for weight loss, who qualifies, how to get it on the NHS, side effects, and what to expect. Updated January 2026.
📅 Updated January 2026⏱ 9 min read👤 Dr. Priya Sharma, MD✓ Medically Reviewed
Key Takeaways
- Wegovy produces average weight loss of 15–17% over 68 weeks (STEP-1 trial, n=1,961)
- Wegovy is the same drug as Ozempic (semaglutide) but at a higher 2.4mg dose
- NHS NICE approved Wegovy in 2023 — but access is still limited and rationed
- In the SELECT cardiovascular trial, semaglutide reduced major cardiovascular events by 20%
- Weight regain of 65% returns within 1 year of stopping — ongoing treatment needed
What Is Wegovy?
Wegovy is the brand name for semaglutide 2.4mg — a once-weekly subcutaneous injection approved specifically for chronic weight management in adults with obesity or overweight with at least one weight-related health condition. It is the same active ingredient as Ozempic (used for Type 2 diabetes) but at a higher dose specifically optimised for weight loss.
15–17%
Average body weight reduction over 68 weeks (STEP-1)
20%
Cardiovascular event reduction (SELECT trial, 17,604 people)
1 yr
How quickly most lost weight returns after stopping
Who Qualifies for Wegovy?
UK (NHS)
NICE approved Wegovy for adults who: BMI ≥35 + at least one weight-related comorbidity (Type 2 diabetes, high blood pressure, sleep apnoea, etc.), when prescribed as part of a specialist weight management service. The NHS also approved it for people with BMI ≥30 and pre-existing cardiovascular disease following the SELECT trial results.
USA (FDA)
FDA approved Wegovy for adults with: BMI ≥30, OR BMI ≥27 with at least one weight-related condition (Type 2 diabetes, high blood pressure, or high cholesterol).
STEP Trial Results
| Trial | Participants | Weight Loss | Key Finding |
|---|
| STEP 1 | 1,961 (no diabetes) | 14.9% | vs 2.4% placebo |
| STEP 2 | 1,210 (Type 2 diabetes) | 9.6% | vs 3.4% placebo |
| STEP 3 | 611 (+ lifestyle) | 16.0% | Combined approach |
| STEP 4 (withdrawal) | 803 | +65% regain | 1 yr after stopping |
| SELECT (CVD) | 17,604 | 20% CVD reduction | Major new finding |
Dosing Schedule
Wegovy is dose-escalated over 16 weeks to minimise side effects:
- Weeks 1–4: 0.25mg once weekly
- Weeks 5–8: 0.5mg once weekly
- Weeks 9–12: 1.0mg once weekly
- Weeks 13–16: 1.7mg once weekly
- Week 17 onwards: 2.4mg once weekly (maintenance dose)
⚠️ Important: Wegovy is Not a Quick Fix
Wegovy is a long-term chronic disease treatment, not a short-term weight loss solution. It works best combined with calorie-appropriate eating and regular physical activity. Without lifestyle changes, results are significantly reduced. When stopped, most weight returns. Approach it as the beginning of a sustainable health journey, not a temporary measure.
Frequently Asked Questions
How do I get Wegovy on the NHS?▼
Ask your GP for a referral to a specialist weight management service. NICE criteria: BMI ≥35 + weight-related condition, or BMI ≥30 + CVD. Alternatively, Wegovy is available privately from specialist obesity clinics and some online prescribing services (from approximately £200–250/month). Supply constraints have been significant — check current availability with your prescriber.
Is Wegovy covered by insurance in the USA?▼
Coverage varies significantly by insurer and employer. Medicare Part D generally covers Wegovy when prescribed for cardiovascular risk reduction (post-SELECT trial). Many private insurers cover it for qualifying conditions. Some employers have added Wegovy coverage following the SELECT trial CVD data. Check your specific plan's formulary and prior authorisation requirements.
Does Wegovy work without dieting?▼
Yes — Wegovy produces significant weight loss even without specific dietary changes, as demonstrated in clinical trials where a modest lifestyle programme was used. However, combining Wegovy with a calorie-appropriate diet (300–500 cal deficit) and regular exercise produces the best outcomes and appears to support better weight maintenance if/when the medication is eventually stopped.
Related Health Guides
⚕️ Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting or changing any medication or treatment.
Dr
Dr. Priya Sharma, MD
WellCalc Medical Contributor
All articles reviewed by qualified healthcare professionals following NHS, AHA, and WHO guidelines.