Unsure of Your Current BMI?
Use our free UK clinical BMI calculator to instantly see which prescription medications you may be eligible for.
Standard UK BMI Thresholds for Weight Loss Injections
In the UK, prescription treatments like Mounjaro (Tirzepatide) and Wegovy (Semaglutide) are licensed medicines governed by the MHRA and NICE guidelines. Prescribers generally license these treatments under two primary clinical categories:
BMI ≥ 30 kg/m² (Obesity)
If your BMI is 30 or greater, you meet the baseline indication for prescription weight loss injections, without requiring an additional weight-related comorbidity.
BMI ≥ 27 kg/m² + Comorbidity
If your BMI is between 27.0 and 29.9 (overweight), you qualify if you have at least one weight-related condition such as hypertension, dyslipidaemia, or sleep apnoea.
What Counts as a Weight-Related Comorbidity?
For patients with a BMI of 27.0 to 29.9, UK prescribers assess for the following documented conditions:
- High blood pressure (Hypertension)
- Type 2 Diabetes or Prediabetes / Impaired Fasting Glucose
- High Cholesterol / Dyslipidaemia
- Obstructive Sleep Apnoea (OSA)
Ethnic BMI Threshold Adjustments (NICE Guidance)
NICE recognises that individuals from South Asian, Chinese, Black African, African-Caribbean, and Middle Eastern backgrounds are at higher cardiovascular and metabolic risk at lower BMI scores.
• The obesity threshold is lowered from 30 kg/m² to 27.5 kg/m².
• The overweight threshold with comorbidities is lowered from 27 kg/m² to 25.0 kg/m².
Check Your Eligibility Online in 3 Minutes
Click Pharmacy is a GPhC-registered UK pharmacy (#9010476). Complete the clinical health questionnaire online to have your eligibility assessed by registered prescribers.