What Happens When You Stop Taking Weight Loss Medication?
When you stop taking weight loss medication, weight often comes back over time (Obesity Evidence Hub). How much returns varies between individuals, and a plan made with your doctor or nurse practitioner, built on a healthy diet and regular physical activity, can help limit regain.
This is general information, not medical advice. Decisions about starting, changing or stopping treatment are made with a registered practitioner who knows your situation, and outcomes vary between individuals.
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Key Points
Weight regain is common after stopping treatment, and how much returns varies between individuals.
After weight loss, hormonal changes lead to more hunger and lower energy use, so regain has a physical basis.
Talk to your practitioner before you stop, and agree on a plan for afterwards.
Healthy eating, physical activity, sleep and support from health professionals can help limit regain, and outcomes vary between individuals.
If weight starts to come back, act early and book a review.
What Happens to Your Weight After You Stop
Weight loss medication can support weight loss, but it does not make obesity go away (healthdirect). Stopping commonly leads to weight regain. As with medicines for other chronic diseases, treatment is expected to be needed over the long term (Obesity Evidence Hub).
How much weight returns, and at what rate, differs from person to person.
What you may notice
Weight loss medication can reduce your appetite, so you may not feel as hungry. After weight loss, the body also makes hormonal changes that lead to more hunger and lower energy use, and the changes that raise hunger last at least six years, probably for life (Proietto, 2022).
Why the body pushes back
Regain is not simply a matter of going back to old habits. Hunger and fullness are regulated by hormones and by a part of the brain that is not under voluntary control, and after weight loss the body adapts with hormonal changes and a lower basal metabolic rate (Royal Australian College of General Practitioners, RACGP). This helps explain why holding a lower weight is hard for most people living with obesity.
The college also describes obesity as a condition with periods of relapse and remission that needs lifelong management. Seen this way, stopping one treatment is a change in your plan, not the end of your care. If your weight stalled during treatment, read about why weight loss slows or stalls.
Common Reasons People Stop
People stop treatment for many reasons, and none of them is unusual. Each one is worth raising with your practitioner, because some have other answers.
| Reason for stopping | What to raise with your practitioner |
|---|---|
| Side effects | Ways to reduce them, or another option |
| Cost | The cost, and how long you may need treatment |
| Planning a pregnancy or breastfeeding | Your plans, before you try to conceive |
| Wanting a break or a change | How long to continue, and your preferences |
When you choose a treatment, your doctor or nurse practitioner talks with you about how long you may need it, the cost, possible side effects and your preferences, so the same topics shape a decision to stop. If you are planning a pregnancy, speak to your practitioner first, because some weight loss medication can be harmful while you are trying to become pregnant or are breastfeeding. At its March 2026 review, healthdirect stated that weight loss medication was not covered by Medicare, so ask your practitioner or pharmacist about the costs.
Talk to Your Practitioner Before You Stop
Raise any wish to stop with the doctor or nurse practitioner who manages your treatment before you change anything. They can explain how to stop in your situation, check whether something can be adjusted instead, and agree what follow-up suits you. If you think you are having a serious side effect, see a doctor at once, and call triple zero (000) in an emergency.
Questions to bring to that conversation:
Is it right for me to stop now, and how should I do it?
What should I keep doing after I stop?
How often should we check in, and what should I watch for?
How much weight change should prompt me to come back for a review?
Burst Health offers phone consultations with Australian doctors and nurse practitioners. If you are a Burst Health patient, raise stopping with a practitioner before you change anything.
If you stopped without a plan and want to talk it through, Burst Health provides medical weight loss plans online after review by an Australian-registered doctor or nurse practitioner, so check whether you are eligible.
Plan Before You Stop
If the strategies you use are not ones you can follow for the rest of your life, regain is likely (Better Health Channel). It helps to build habits you can keep after treatment ends, and to make the plan while you are still in regular contact with your practitioner.
Agree on the next steps with your practitioner. Settle how you will stop, when you will check in, and who you will contact if things change.
Agree when to come back. Settle how much weight change should prompt a review. Australia's National Obesity Strategy calls on GPs to act early to reverse small increases in weight (RACGP). You can also work out your weight change as a percentage to see the trend.
Keep a healthy eating plan. Eat a wide variety of nutritious foods from the five food groups every day, and drink plenty of water (Eat for Health). Energy needs depend partly on body weight, so check how many kilojoules a day suit you. If hunger is hard to manage, a dietitian can help with a food program tailored to your needs.
Stay active most days. Do moderate to vigorous activity for 30 minutes or more on most days, and muscle-strengthening activities on 2 or more days a week (Department of Health, Disability and Ageing). Combined with a healthy diet, strength training can help you avoid weight gain. For walking goals, see how many steps a day help.
Protect your sleep. The same guidelines recommend 7 to 9 hours of good quality sleep with consistent bed and wake-up times. Sleep helps control your appetite and weight.
Line up support. A dietitian, exercise physiologist, lifestyle coach or psychologist can help you make a plan that suits you. For the wider picture, see how medical weight loss programs work.
If Weight Starts to Come Back
Regain after stopping is common, and overweight and obesity are not simply the result of an unhealthy lifestyle (Obesity Evidence Hub). If weight starts to come back, act early: book a review with your practitioner, and look again at what you eat and how active you are. Primary care has a key role in helping people prevent weight regain (Australian Obesity Management Algorithm).
For some people, a practitioner may talk about other options if weight returns, such as a very low energy diet, or a reduced energy diet combined with weight loss medication. In the same algorithm, the first step is a reduced energy diet or a low energy diet, combined with a program to increase regular physical activity. For realistic expectations, see how much weight you can realistically lose, or start with a realistic guide to losing weight.
Looking After Your Mood
Mental health and weight affect each other. Weight gain may follow low motivation, poor sleep, physical inactivity, or comfort and stress eating (RACGP). If this sounds familiar, talk to your doctor or nurse practitioner. A counsellor or psychologist can help with long-term changes, and cognitive behavioural therapy (CBT) teaches you to recognise when and why you eat.
Frequently Asked Questions
What happens when you stop taking weight loss medication?
Weight often starts to come back over time, and regain after stopping is common. Hunger may also rise, because weight loss brings hormonal changes that increase hunger and lower energy use. How much weight returns varies between individuals. A plan made with your practitioner, built on a healthy diet, regular physical activity and good sleep, can help limit regain.
Will I gain weight back if I stop taking weight loss medication?
Possibly. Weight regain is common after stopping, and the amount varies from person to person. After weight loss, hunger tends to rise and the body uses less energy, so regain has a physical basis. Planning with your practitioner before you stop, and keeping up healthy eating, physical activity and sleep habits, can help limit it.
Do you have to take weight loss medication forever?
Often, for the long term. Treatment is generally expected to be long term, as with medicines for other chronic diseases, and stopping commonly leads to weight regain. How long you take it is a decision you make with your practitioner, based on your health, your preferences, side effects and cost. Outcomes vary between individuals.
Can you just stop taking weight loss medication?
You can choose to stop, but talk to the doctor or nurse practitioner who manages your treatment first. It helps to bring your reason for stopping, any side effects you have noticed, and the eating, activity and sleep habits you plan to keep up. Planning ahead gives you time to put those habits in place.
How can you limit weight regain after stopping?
Plan before you stop. Agree on check-ins with your practitioner and on how much weight change should prompt a review. Eat a variety of foods from the five food groups, stay active most days, include strength training and protect your sleep. A dietitian, exercise physiologist or psychologist can help. Results vary between individuals.
What if I stopped because of side effects?
Tell your doctor or nurse practitioner, and your pharmacist. There may be ways to reduce side effects, or another option that suits you better. You can report side effects to the Therapeutic Goods Administration (TGA), or call healthdirect on 1800 022 222 to speak with a registered nurse about a possible side effect.
Medical weight loss plans, online
In three steps.
- 1Answer a quick questionnaireOnline, no appointment, no in-person visit.
- 2A practitioner reviews itAn Australian-registered doctor or nurse practitioner decides whether treatment is suitable for you.
- 3Start your planIf treatment is suitable, you start your plan with the practitioner supporting you throughout.
References
Obesity Evidence Hub. Medication and surgery for the treatment of overweight and obesity in adults.
Proietto J. Medicines for long-term obesity management. 2022.
Better Health Channel (Victorian Government). Weight loss: a healthy approach.
Eat for Health (NHMRC). Australian dietary guidelines 1 - 5.
This article is general information only and does not replace individual medical advice. Please speak with a registered Australian healthcare practitioner before starting, changing or stopping any treatment.