Before any question about how the Wegovy pill works comes the gating question: would you qualify for it at all? Eligibility for weight-management medicines follows a reasonably standard pattern in the UK, built on body mass index plus health context, and understanding it before an assessment saves time and sets honest expectations. It also helps you recognise both kinds of bad answer: providers who would prescribe to anyone, and self-exclusion by people who assume they would not qualify when they would.
The core criteria
The licence for weight-management semaglutide, tablet or injection, follows the pattern used across this class of medicines: adults with a BMI of 30 or above, which is the clinical definition of obesity; or adults with a BMI of 27 or above who also have at least one weight-related health condition. The second route matters because it recognises that health risk, not the number alone, is the point. A BMI of 28 alongside type 2 diabetes or high blood pressure represents more medical urgency than a BMI of 31 with no complications, and the criteria reflect that.
Weight-related conditions typically counted include type 2 diabetes or prediabetes, high blood pressure, abnormal cholesterol, obstructive sleep apnoea, cardiovascular disease, and weight-driven joint problems such as osteoarthritis. Polycystic ovary syndrome and fatty liver disease often feature in clinical judgement too. If you sit in the 27 to 30 band, the assessment will want evidence of the condition, a diagnosis in your records or measurements taken during the consultation, rather than self-report alone.
BMI adjustments you might not know about
BMI is a blunt tool, and UK guidance sharpens it in one important way: for people from South Asian, Chinese, other Asian, Middle Eastern, Black African and African-Caribbean backgrounds, health risks rise at lower BMIs, so thresholds are commonly reduced, typically by 2.5 points, meaning eligibility can begin around 27.5 rather than 30. If this describes you and you have previously bounced off a BMI cut-off, it is worth asking specifically about adjusted thresholds. In the other direction, BMI can overstate risk in very muscular people, which is one of several reasons a human assessment beats a calculator: waist measurement and health markers tell a fuller story than the single number.
Eligible on paper is not the whole decision
Meeting the BMI criteria opens the door; safety screening decides whether you walk through it. The assessment will check for the situations where semaglutide should not be used or needs specialist judgement: pregnancy, trying to conceive or breastfeeding; a history of pancreatitis or significant gallbladder disease; certain thyroid and gut conditions; eating disorder history; and medicines that need managing alongside, particularly some diabetes treatments. We cover these fully in our article on who should not take the Wegovy pill. Expect questions about your weight history and previous attempts too, not as gatekeeping ritual but because they shape realistic goals and the support you may need alongside the medicine.
What a good assessment looks like
Whether NHS or through a registered online pharmacy, a legitimate pathway shares a shape: verified height and weight rather than an unchecked form field, a structured medical history, an honest conversation about risks and expectations, and a prescriber making an individual judgement. Many reputable online services ask for photographic or video verification of weight, precisely because paper eligibility is easy to fake and the medicine is not risk free. Treat that friction as a feature. A seller who requires nothing but a card number is not offering you convenience; they are declining the safety work, and what arrives may not even be genuine medicine. The MHRA has repeatedly warned about exactly this trade.
If you do not qualify
Falling below the thresholds is not a dead end, and it is emphatically not a prompt to misstate your weight, which only removes the safety margin the criteria exist to protect. Depending on your situation, the constructive routes are structured lifestyle support, which remains genuinely effective and is the foundation the medicines build on anyway; treating specific conditions driving weight, from thyroid problems to medication side effects; or a review later if your situation changes. And if you are above the thresholds but have been putting an assessment off on the assumption you would be refused, the criteria above are your answer: obesity is a treatable medical condition, the eligibility bar is where medicine says treatment helps more than it risks, and finding out where you stand takes one honest consultation. Our complete guide to the Wegovy pill covers what treatment involves from there.
Preparing for the assessment
Fifteen minutes of preparation makes an assessment faster and its outcome more reliable. Measure your height and weight properly rather than quoting memory, since eligibility can turn on a point of BMI. List your medicines and supplements completely, including anything bought online, and note the conditions you have been diagnosed with, especially the weight-related ones that open the 27-plus route. Gather your weight history in rough shape, what you have tried, what happened, because it informs realistic goals and the support worth adding. Think honestly about the questions you should expect: digestive conditions, pancreatitis or gallbladder history, thyroid issues, eating patterns, pregnancy plans. And prepare your own questions in return, about dose schedules, review frequency and what happens if the first months disappoint. An assessment is a two-way exercise; arriving prepared turns it from a form-filling hurdle into the first useful appointment of treatment.
