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.
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.
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:
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.
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.
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:
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.
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:
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.
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.
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.
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