When does a doctor prescribe weight-loss medication?

A doctor prescribes weight-loss medication when someone meets specific medical criteria, such as an elevated BMI combined with weight-related health issues. Medication is not a first step, but an addition to a treatment plan in which lifestyle plays a central role. This article answers the most frequently asked questions about when and how a doctor can prescribe weight-loss medication.

What criteria does a doctor use in their assessment?

A doctor assesses whether someone is eligible for weight-loss medication based on medical criteria, of which BMI is the most well-known. In most guidelines, a BMI of 30 or higher serves as the starting point, or a BMI of 27 or higher when weight-related conditions such as high blood pressure, type 2 diabetes, or sleep apnoea are present. The mere fact that someone wants to lose weight is not in itself a medical indication.

Besides the BMI, a doctor looks at the overall health situation of the patient. Relevant factors include:

• Existing conditions associated with being overweight
• Previous attempts at weight loss through lifestyle modification
• Medication use that can cause weight gain or affect treatment
• Contraindications such as certain cardiovascular diseases, pregnancy or specific metabolic disorders

A doctor also asks questions about lifestyle, eating habits and exercise patterns. This is not to judge, but to get a complete picture of the situation. Based on all this information, the doctor independently decides whether a treatment is medically justified. Not everyone who submits an application is automatically eligible for a weight loss treatment.

Which weight loss medication can a doctor prescribe?

The most talked-about category of weight loss medication in 2026 is GLP-1 medication. These are treatments that act on hormones that play a role in hunger and satiety. GLP-1 receptor agonists can contribute to weight loss by reducing the feeling of hunger and slowing down gastric emptying. Results vary per person and depend on multiple factors.

Besides GLP-1 medication, there are other categories that a doctor may consider, depending on the individual situation:

• GLP-1 receptor agonists: Injectable or oral agents that affect the feeling of fullness and can regulate blood sugar levels
• Lipase inhibitors: Agents that partially block the absorption of fats in the intestine
• Combination medication: In some cases, combinations of active substances are used, depending on the medical indication

Which medication is suitable depends entirely on the individual medical situation. A doctor does not prescribe weight-loss medication based on preference or popularity, but on medical suitability. Prescription-only medication is never dispensed without assessment by a doctor and approval from a pharmacy.

Why doesn't a doctor always prescribe weight-loss medication?

A doctor does not always prescribe weight-loss medication because medication is only medically justifiable in specific situations. When the BMI is below the threshold value, there are no weight-related health complaints, or when contraindications are present, medication is not an appropriate choice. A doctor acts on the basis of medical guidelines, not on the basis of the patient's wishes.

There are multiple reasons why an application is not approved:

• The BMI does not meet the medical threshold
• There are contraindications based on existing conditions or medication use
• The medical questionnaire provides insufficient information for a responsible assessment
• The doctor considers that a different approach is medically more appropriate

This is not a rejection of the person, but a medical decision. The fact that a doctor assesses independently and critically is precisely a sign of diligence. People who are not eligible for medication can seek further guidance through their GP or a dietician.

What is the role of lifestyle alongside weight-loss medication?

Weight-loss medication works best as part of a broader programme in which lifestyle change is central. Medication can contribute to weight loss by reducing the sense of hunger or affecting fat absorption, but without adjustments to diet and exercise, long-term results are more limited. Medication is a tool, not a replacement for behavioural change.

In practice, this means that people who use weight-loss medication must also pay attention to:

• Dietary pattern: less processed food, more vegetables, protein and fibre
• Exercise: regular physical activity, even in a busy schedule
• Sleep and stress management: factors that directly influence weight and eating behaviour

For people with a hectic life, this can be a challenge. Still, it is realistic to make small, achievable adjustments that have an effect over time. A doctor or practitioner can help to manage expectations and find an approach that fits daily reality. Medication without any lifestyle adjustment rarely leads to sustainable results.

How does an online medical assessment for weight loss medication work?

An online medical assessment for weight loss medication proceeds via a structured intake process in which a doctor independently assesses the application. The patient completes a medical questionnaire, on the basis of which the doctor determines whether treatment is medically justifiable. This is not an automated process: a GMC-registered doctor makes the decision.

The process typically consists of the following steps:

1. Completing a medical questionnaire with information about health, medication use and lifestyle
2. Assessment by a doctor, who determines which treatment may be appropriate based on the answers
3. Patient's choice of a treatment option and prepayment
4. Final assessment by the doctor, within 24 hours on working days
5. Upon approval: drafting a prescription and forwarding it to the collaborating pharmacy
6. Review and dispensing by the pharmacy, followed by discreet dispatch

Prescription medication is never dispensed without medical approval. The pharmacy independently assesses and processes prescriptions and deliveries. Further information about this process can be found on the page How Wellumo works.

How does Wellumo help with requesting weight loss medication?

Wellumo makes it possible to apply online for a medical assessment for weight-loss medication, supervised by BIG-registered doctors. The process is discreet, transparent about pricing and fully in line with medical standards. Wellumo offers no guarantees of results, but ensures a careful and accessible process.

What Wellumo offers:

• A medical intake via an online questionnaire, reviewed by a GMC-registered doctor
• Transparent pricing information beforehand, with no hidden costs
• Assessment within 24 hours on working days after completing the intake
• Discreet delivery of medication via a certified pharmacy partner
• An optional subscription for repeat deliveries
• A 45-day refund policy on selected treatment pathways

Not everyone is eligible. A doctor assesses on an individual basis whether a treatment is medically sound. People who want to know if they are eligible can use the Start medical intake via the Wellumo website. If you have any questions, it is also possible to to contact with the team.