Written and medically assessed by W. van Donselaar, MD, BIG 79020681301, on 02-06-2026.
Are you not losing weight on Ozempic? This is a common experience, and there are several explanations. Often it's because of the stage of your journey or your lifestyle. Sometimes something else is at play. Below we walk through the most common causes, and what you can do about it.
You are still on the starting dose
The most common reason: you are still too short. The Ozempic injection starts on a low dose of 0.25 mg per week. That dose is meant to get used to, not to lose weight. The real effect comes later, when the dose goes up to 0.5 mg or 1 mg.
Are you still in your first weeks and not seeing much on the scales? If so, that's normal. Give it time.
Your lifestyle counteracts the effect
Ozempic dampens your hunger. But it does not differentiate between healthy and unhealthy food. A few things can flatten the effect:
- Liquid calories: soft drinks, fruit juice and alcohol do not fill up, but do add up.
- Large portions: even with less hunger, you can keep eating out of habit.
- Little protein: protein helps you feel full and maintain muscle.
- Little movement: exercise supports your weight loss and your health.
A dietician can help recognise such patterns. Sometimes it's in little things you don't realise yourself.
You have reached a plateau
Do you lose weight well at first and then stall? That's called a plateau. It is a normal phenomenon, often around six to nine months. Your body adapts to your new weight. It uses less energy, and weight loss flattens out.
A plateau does not mean that the drug no longer works. It means that your body is looking for a new balance. Sometimes a dose adjustment helps, sometimes a change in your lifestyle. You discuss this with your doctor.
Considering the medical way to lose weight? Do our own health check to see if you qualify. Already sure? Then fill in our simple questionnaire before starting your journey.
Other possibilities
Sometimes the cause lies deeper. A number of factors can inhibit your weight loss:
- Other drugs that cause weight gain.
- A slow-working thyroid gland.
- Lots of stress or little sleep, which affect your hunger and your metabolism.
A doctor can assess whether such a thing is involved. Therefore, don't diagnose yourself, but discuss it.
When is evaluation needed?
A common guideline: after 12 weeks on the active dose, you should have lost at least five per cent of your weight. If you do not achieve this, then a consultation with your doctor is in order. Together, you look at the dose, your lifestyle, other factors or a switch to another drug.
A small group of people hardly respond to semaglutide. For them, another drug, such as Mounjaro injection, work better. A doctor will judge that too.
Key points of the blog
I have been using Ozempic for 8 weeks now and see no difference. Is that normal?
I have been using Ozempic for 8 weeks now and see no difference. Is that normal?
On the starting dose of 0.25 mg, weight loss is often limited. Only after building up to 0.5 or 1 mg does the effect become more evident. Twelve weeks on the active dose is a good time to assess whether there is enough response.
What if I still don't lose weight after 12 weeks on the active dose?
What if I still don't lose weight after 12 weeks on the active dose?
A guideline is at least five per cent weight loss as a sign of sufficient response. Below that, consultation with your doctor is appropriate, about dose, lifestyle, other agents or a switch.
Could something in my lifestyle counteract the effect?
Could something in my lifestyle counteract the effect?
Yes. Liquid calories, large portions despite satiety, low protein and little exercise can flatten the effect. A dietitian can help recognise those patterns.