With newer weight-loss treatments receiving increasing attention, many people are wondering whether medication can help them manage their weight.
But, who actually needs it, and what should you consider before starting?
Perhaps you have tried cutting down on your portions, eating healthier or exercising more, only to find that the weight comes back.
Or perhaps your doctor has advised you to lose weight because of high blood pressure, diabetes or fatty liver disease.
Whatever your situation, you may have wondered: “Do I need weight-loss medication?”
The short answer is: not necessarily.
But for some, medication can be a useful part of a medically supervised weight-management plan.
Why is losing weight sometimes so difficult?
Weight management is more complicated than simply eating less and moving more.
Our body weight is influenced by genetics, appetite, hormones, sleep, stress, physical activity and our environment. Certain medical conditions and medications can also contribute to weight gain.
When we lose weight, our bodies may respond by increasing hunger and reducing energy expenditure. This is one reason why maintaining weight loss can be difficult.
Understanding these factors helps us approach weight management more realistically, rather than treating every unsuccessful attempt as a failure of willpower.
When might weight-loss medication be considered?
Medication is generally considered when excess weight is affecting a person’s health, particularly when lifestyle changes alone have not produced sufficient results.
For example, some prescription weight-management medications approved in Singapore are indicated for adults with:
- A body mass index (BMI) of 30 kg/m² or above, or
- A BMI of 27 kg/m² or above, together with at least one weight-related medical condition, such as high blood pressure, high cholesterol, prediabetes, type 2 diabetes or obstructive sleep apnoea.
These are medication-specific prescribing criteria, not universal definitions of a healthy weight.
In Singapore, we also recognise that Asian individuals may develop weight-related health risks at lower BMI levels. A person’s waist circumference, medical conditions and overall metabolic health are therefore important considerations.
The decision to start medication should be based on an individual medical assessment, not BMI alone.
What are GLP-1 and related weight-loss treatments?
You may have heard about medications such as semaglutide and tirzepatide.
These are prescription treatments that act on hormonal pathways involved in appetite regulation and blood sugar control.
Semaglutide acts on the GLP-1 receptor, while tirzepatide acts on both GIP and GLP-1 receptors.
In suitable patients, these treatments can help reduce hunger, increase feelings of fullness and support weight loss when combined with dietary changes and physical activity.
They are not the only approaches available. Depending on an individual’s circumstances, weight management may involve structured lifestyle interventions, other medications or, in selected cases, bariatric surgery.
Are there health benefits beyond losing weight?
Yes. For someone living with obesity, improving weight and metabolic health may also help address associated conditions such as high blood pressure, abnormal blood sugar levels and obstructive sleep apnoea.
Fatty liver disease is another important consideration.
Metabolic dysfunction-associated steatotic liver disease (MASLD), previously commonly called non-alcoholic fatty liver disease, is associated with metabolic risk factors such as excess body fat and insulin resistance.
Some patients develop a more serious form called metabolic dysfunction-associated steatohepatitis (MASH), which involves liver inflammation and can lead to fibrosis, or scarring.
Recent clinical research has shown that semaglutide can improve liver inflammation and fibrosis in some patients with MASH. A semaglutide treatment has also received an additional approved indication in Singapore for selected adults with non-cirrhotic MASH and moderate to advanced fibrosis (F2–F3).
This is an encouraging development, but it does not mean that everyone with fatty liver disease needs medication, or that existing liver scarring can always be completely reversed.
The severity of liver disease and suitability for treatment need to be assessed individually.
What are the risks and side effects?
Weight-loss medications are not suitable for everyone.
GLP-1-based and related treatments commonly cause digestive side effects, including nausea, vomiting, diarrhoea, constipation and abdominal discomfort. Some people may experience more significant complications.
A doctor should review your medical history, other medications, pregnancy plans and any relevant conditions, including previous pancreatic or gallbladder problems, before recommending treatment.
It is also important to obtain prescription medication through legitimate medical channels rather than purchasing injections or other products from unverified online sellers.
Will I regain weight if I stop medication?
Weight regain is possible after stopping treatment, particularly because the biological factors that contribute to weight gain may still be present.
This is why weight management should be viewed as a longer-term process.
Medication may help with appetite control, but healthy eating habits, physical activity, adequate sleep and ongoing follow-up remain important.
By using medication to help with weight reduction, you buy time for yourself to adjust your lifestyle and adopt healthier habits.
Preserving muscle mass through adequate nutrition and appropriate strength-based activity is also worth considering during weight loss.
So, do I actually need weight-loss medication?
There is no single answer that applies to everyone.
Some people may achieve meaningful improvements through lifestyle changes alone. Others may benefit from additional medical treatment, particularly when excess weight is contributing to health problems.
A consultation can help identify contributing factors, review your health risks, discuss realistic goals and determine which options are appropriate for you.
The goal of weight management is not simply to reach a smaller number on the weighing scale. It is to improve your health in a way that is safe, realistic and sustainable.
At GreenLink Medical Clinic in Khatib, Yishun, we take an individualised approach to weight management, considering your medical history, health concerns and personal goals.
You can learn more about our Medical Weight Management services or speak to our doctor about whether medical weight management may be appropriate for you.
References & Further Reading
- Health Sciences Authority (Singapore) — Listing of Therapeutic Product Approvals — Singapore prescribing indications, including the additional MASH indication approved in August 2026.
- Sanyal AJ, et al. Phase 3 Trial of Semaglutide in Metabolic Dysfunction-Associated Steatohepatitis. New England Journal of Medicine, 2025.
- HealthHub Singapore — Weight Management.
- Health Sciences Authority — Risks of Obtaining Prescription Medicines Through Unauthorised Channels.
This article provides general health information and is not a substitute for individual medical advice. Treatment decisions should be made following an appropriate medical assessment.