Wellumo
Health

Wat zijn tekenen dat afslankmedicatie voor jou werkt?

  • 24 July 2026
Slim waist with loose waistband, measuring tape, glass of water, and medication on white surface, flat vector illustration.

The first signs that weight-loss medication is working include a reduced feeling of hunger, less desire for large portions, and a gradual decrease in body weight within the first few weeks. These signals are not always as pronounced or as quickly visible in everyone, as the response to medication varies from person to person. This article discusses what people can realistically expect, when medication is not effective, and when contact with a doctor is necessary.

How quickly do you notice the effects of weight loss medication?

Most people notice the first effects of GLP-1 medication for weight loss within one to two weeks of starting treatment. This primarily concerns changes in appetite and satiety, not directly a visible drop on the scales. Weight loss itself typically only becomes measurable after a few weeks.

The reason the effect isn't immediately visible in terms of kilograms is due to how GLP-1 medication works. These agents influence hormones involved in hunger and satiety, causing people to eat less without consciously having to try. That process needs time to settle in, especially as the dosage in most treatment plans is gradually increased to limit side effects.

Those who notice no effect after four to six weeks, not even in appetite or energy levels, would be well advised to discuss this with their treating physician. The absence of any effect could be a sign that the dosage or type of medication is not optimally suited.

What are the first physical signs that the medication is working?

The earliest physical signs that weight loss medication is effective are a significantly reduced feeling of hunger, feeling fuller more quickly during meals, and a lower desire to snack. Some people also notice that thoughts about food are less prevalent than before, which is referred to as a reduction in “food noise”.

Besides changes in appetite, the following signs may also occur:

  • Smaller portions feel sufficient without feeling hungry afterwards
  • Less desire for high-calorie or sweet foods
  • A slight drop in weight, visible on the scales after two to four weeks
  • Greater awareness of satiety signals during eating

It is important to distinguish between the effects of the medication and temporary side effects. Nausea, a feeling of fullness, or a reduced appetite in the first few days can also be a result of the body adjusting to the medication, and not necessarily a sign of a long-term effect. When these signs persist and are accompanied by weight loss, it is a positive sign that the treatment is working.

How much weight loss is realistic in the first few months?

Realistic weight loss in the first three months of drug treatment averages between three and eight percent of the starting weight, depending on the individual, the dosage, and the extent to which lifestyle changes are implemented. Results vary from person to person and are never guaranteed.

A gradual rate of weight loss, roughly half to one and a half kilograms per week, is considered healthy and sustainable by doctors. Faster weight loss is not necessarily better and can be accompanied by loss of muscle mass or other undesirable effects.

Medication for weight loss works best as part of a broader plan. Adjustments to eating habits and exercise significantly enhance the medication's effect. Those who rely solely on medication without any behavioural changes will typically see less results than someone who combines both. This is not a judgment, but a medical fact that helps to keep expectations realistic.

Wanneer werkt afslankmedicatie juist niet goed?

Weight loss medication works less well, or not at all, when the dosage is not tailored to the individual, when lifestyle factors counteract the effect, or when the medication is not medically suitable for the person in question. Irregular use or skipping doses also significantly reduces effectiveness.

Factors that can limit the effectiveness of weight loss medication:

  • Chronic sleep deprivation, which disrupts hormones related to hunger and satiety
  • High stress levels, which affect eating behaviour and metabolism
  • Excessive alcohol consumption, which adds calories and can affect the efficacy of medication
  • Irregular use of medication
  • An underlying medical condition that makes weight loss difficult

A lack of results after eight to twelve weeks of correct dosage and use is a reason to have the treatment reassessed by a doctor. Sometimes an adjustment to the treatment plan is necessary, and sometimes the conclusion is that a different approach is more suitable.

Wanneer moet u contact opnemen met een arts over uw behandeling?

Contact with a doctor is necessary when no effect is noticeable after four to six weeks, when side effects are severe or persistent, or when new complaints arise that may be related to the medication. Doubt about the course of a treatment is always a valid reason to get in touch.

Specific situations where you should not delay contacting a doctor:

  • Persistent nausea, vomiting or stomach pain that does not improve after the first few weeks
  • Severe fatigue or dizziness that affects daily functioning
  • Weight loss that is unexpectedly rapid or conversely, completely absent
  • Questions about adjusting dosage or stopping treatment
  • New medications or health conditions that could cause interactions

The treating physician is the designated person to assess whether a treatment is on track, needs adjusting, or should be stopped. Making adjustments to dosage or usage yourself without medical consultation is not recommended.

How Wellumo helps with weight loss using medication

Wellumo offers a completely digital journey for people who want to explore if GLP-1 medication might be suitable for them. The process is designed with medical diligence as its starting point, free from barriers or unnecessary bureaucracy.

What the trajectory at Wellumo entails:

  • A medical questionnaire via a online intake with which the situation is mapped out
  • Assessment by a BIG-registered doctor, who independently determines whether a treatment is medically justifiable
  • Upon approval: a prescription that is forwarded to a certified pharmacy
  • Discrete shipping of medication, with the option of a subscription for repeat deliveries
  • Transparent pricing information beforehand, with no hidden costs
  • Guidance throughout the process, with the option to to contact Should you have any questions or concerns

Not everyone is eligible for treatment. A doctor will assess on an individual basis whether medication is appropriate and advisable. Would you like to know if a course of treatment could be suitable for you? See How Wellumo works and start an intake to have your situation assessed.

Start your personal
treatment plan.Supported by doctors, tailored to your situation.

Other articles

Frequently asked questions

Need help or have a question?
Call us on +31 33 25 88 593
Our customer service team is happy to help, Monday to Friday.

Prefer to e-mail?
Send us a message at info@wellumo.com

1) Choose your treatment on the website.
2) Complete the medical questionnaire.
3) A BIG-registered doctor will assess your application.
4) Upon approval, the doctor writes a prescription and releases the partner pharmacy.
5) We will deliver discreetly to your home (possibly in subscription form).

A doctor who is BIG-registered in the Netherlands. You can see the BIG number on this site and check it in the BIG register.

After medical approval and release by the pharmacy, shipment is usually 1-3 working days (excluding Sundays/Holidays). Refrigerated transport or delivery restrictions may affect.

No. Prescription drugs are never supplied without medical assessment and pharmacy release.

Start losing weight

How Wellumo works

Start my free check

Before you can place an order, we ask you to complete a medical questionnaire. Based on your answers, one of our doctors will assess which treatment best suits you.
  • 3 minutes

Choose and order your medication

Upon completion of the questionnaire, the most suitable medication(s) will be displayed. You select your desired medication and pay for it in advance. After ordering, one of our doctors will contact you within 24 hours (on weekdays). No approval? In that case, you will of course receive a full refund immediately.
  • 1 minute

Confirm your identity

We are required to verify your details, and we do this via ID verification. This is a simple and secure way to confirm your identity. Please ensure you have a valid ID ready: driving licence, passport, or ID card.
  • 1 minute

Contact with the doctor

One of our doctors will contact you personally. Upon approval, the prescription will be issued and we will send your medication to the specified address via our pharmacy.
  • Within 24 hours (on working days)

Medication delivery from our Pharmacy

Medication delivery is handled by our in-house pharmacy. With a subscription, we ensure that repeat prescriptions are always refilled on time. You can cancel at any time easily through your personal account.
  • 1-2 working days

Ondersteuning tijdens je persoonlijke traject

Through your personal account, you have access to many functionalities that will help you throughout the entire weight loss process. You also have easy contact with one of our doctors, and telephone contact is also possible, of course.

Start my free check

Before you can place an order, we ask you to complete a medical questionnaire. Based on your answers, one of our doctors will assess which treatment best suits you.
  • 3 minutes

Choose and order your medication

Upon completion of the questionnaire, the most suitable medication(s) will be displayed. You select your desired medication and pay for it in advance. After ordering, one of our doctors will contact you within 24 hours (on weekdays). No approval? In that case, you will of course receive a full refund immediately.
  • 1 minute

Confirm your identity

We are required to verify your details, and we do this via ID verification. This is a simple and secure way to confirm your identity. Please ensure you have a valid ID ready: driving licence, passport, or ID card.
  • 1 minute

Contact with the doctor

One of our doctors will contact you personally. Upon approval, the prescription will be issued and we will send your medication to the specified address via our pharmacy.
  • Within 24 hours (on working days)

Medication delivery from our Pharmacy

Medication delivery is handled by our in-house pharmacy. With a subscription, we ensure that repeat prescriptions are always refilled on time. You can cancel at any time easily through your personal account.
  • 1-2 working days

Ondersteuning tijdens je persoonlijke traject

Through your personal account, you have access to many functionalities that will help you throughout the entire weight loss process. You also have easy contact with one of our doctors, and telephone contact is also possible, of course.

This email address is already known

We have already found this email address in our system. Would you like to receive a 6-digit login code to log in and proceed?