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Semaglutide has become one of the most talked-about weight loss medications in recent years. First designed for type 2 diabetes management, this once-weekly injection has shown significant results in helping people lose weight and keep it off.

Key Takeaways

Semaglutide is a once-weekly injectable medication initially made for type 2 diabetes and is now widely used for weight loss.
It supports weight management by reducing appetite, slowing digestion and regulating blood sugar levels.
Doctors prescribe semaglutide for adults whose BMI is 30 or above, or 27 and above with related health conditions.
Patients often experience nausea, vomiting, and diarrhoea as the most common side effects, which usually improve over time.
In Singapore, semaglutide needs a doctor’s prescription and should be used under the supervision of a healthcare professional.

In this guide, we’ll further explain what semaglutide is, how it works, its side effects and how you can access it in Singapore.

What is Semaglutide?

Semaglutide is a GLP-1 receptor agonist (glucagon-like peptide-1), a medication meant to replicate the effects of a natural hormone. This hormone helps regulate appetite, digestion and blood sugar levels, making semaglutide effective for managing type 2 diabetes and supporting weight loss.

Initially approved for diabetes treatment, semaglutide is now also prescribed for chronic weight management in people with obesity or weight-related health issues. Unlike daily tablets, it comes as a once-weekly injectable, making it more convenient for long-term use and easier to stay consistent with treatment.

How Semaglutide Works in the Body

Semaglutide imitates the action of a natural hormone called GLP-1 (glucagon-like peptide-1), which regulates appetite, digestion and blood sugar levels. It activates GLP-1 receptors in the body and triggers processes that make weight management more effortless.

One of its key effects is appetite suppression. Semaglutide reduces hunger signals in the brain, so patients feel satisfied with smaller meals and experience fewer cravings. It also slows digestion, helping food stay in the stomach longer and prolongs feelings of fullness.

In addition, it regulates blood sugar by lowering glucose spikes after meals, which curbs cravings and stabilises energy levels. These combined effects promote gradual and sustainable weight loss. Semaglutide helps people eat less, maintain control over their choices and achieve healthier results when diet and exercise alone do not succeed.

How Does Semaglutide Help with Weight Loss?

People taking semaglutide for weight loss typically experience gradual and sustained weight reduction thanks to its multi-pronged effects on appetite, digestion and blood sugar control—targeting key mechanisms that make healthy eating easier.

Appetite regulation: Semaglutide helps curb hunger by suppressing appetite, making portion control more manageable and minimises unnecessary snacking.
Delayed gastric emptying: It slows the stomach’s emptying process, helping you maintain satiety and reduce cravings.
Blood sugar stability: This medication helps prevent the blood sugar highs and lows that frequently drive hunger cravings, supporting steadier energy levels and better dietary choices.

Clinical data demonstrates that patients using semaglutide experience a mean weight loss of nearly 15% over 68 weeks—far eclipsing the 2–3% weight loss seen in the placebo group—with a sizable proportion achieving reductions of 10% or more.

Similarly, a two-year clinical study published in Diabetes, Obesity and Metabolism shows that patients using once-weekly semaglutide 2.4 mg, combined with lifestyle intervention, lost on average 15.2% of their body weight over 104 weeks, compared to around 2.6% in the placebo group—an estimated treatment effect difference of ≈12.6 percentage points.

In the same study, 77.1% of patients on semaglutide achieved a weight loss of 5% or more, 61.8% achieved 10% or more, 52.1% achieved 15% or more, and over one-third (36.1%) achieved 20% or more—versus significantly lower percentages in the placebo group.

While most people tolerate semaglutide well, it’s essential to be aware of semaglutide side effects, which commonly include gastrointestinal symptoms such as nausea or mild digestive discomfort. Fortunately, these often improve as the body adjusts and medical supervision helps manage them effectively.

Who Can Take Semaglutide for Weight Loss?

Doctors usually prescribe semaglutide for weight loss intended for adults with a BMI of 30, or 27 when accompanied by obesity-related conditions. It is recommended for people who have not achieved results with diet and exercise alone, and works most effectively alongside healthy lifestyle habits.

However, semaglutide is not suitable for everyone. Pregnant or breastfeeding women should not use it, and a doctor will assess their health to decide if this medication is proper for them.

How to Get Semaglutide in Singapore

Is Semaglutide Legal in Singapore?

Yes. Doctors in Singapore can prescribe semaglutide, but you cannot buy it over the counter or from online sellers. Licensed healthcare providers control access to ensure patients use it safely and receive proper monitoring for side effects. You can read more about it in the HSA’s official announcement.

How to Get a Prescription

To begin treatment, book a consultation with a doctor. The doctor will check your medical history, body mass index (BMI) and weight-loss goals. If you qualify, the doctor will prescribe semaglutide for weight loss and explain how to use it correctly. They will also create a plan that combines the medication with diet and exercise to help you achieve better results.

How Much Does Semaglutide Cost?

Clinics in Singapore set the price of semaglutide based on dosage and treatment duration. Most patients pay between several hundred to over a thousand Singapore dollars monthly. Because treatment usually lasts several months, your doctor may adjust your dosage over time, which can affect the total cost.

Some clinics also offer package plans, so ask about pricing options during your consultation.

Side Effects of Semaglutide

Like all medications, semaglutide can cause side effects, although not everyone experiences them. Most appear during the first few weeks of treatment and improve as the body adjusts, while some rare effects may require medical attention.

Common Side Effects

Nausea
Vomiting
Diarrhoea or constipation
Headaches
Fatigue or low energy
Dizziness

Less Common Side Effects

Indigestion or acid reflux
Belching or burping
Reduced appetite (which often supports weight loss)
Redness or irritation at the injection site

Rare but Serious Side Effects

Pancreatitis (inflammation of the pancreas)
Kidney issues are linked to dehydration from severe vomiting or diarrhoea.
Thyroid tumours (observed in animal studies, monitored in humans as a precaution)
Severe allergic reactions may cause swelling of the face, lips, tongue, or throat

Most patients tolerate semaglutide for weight loss well. Mild side effects often improve as your body adjusts, but contact your doctor if they persist or worsen. Always follow medical guidance and avoid adjusting your dose without professional advice.

How to Use Semaglutide Safely

Weekly 2.4mg Semaglutide Injection: Treatment Process in Singapore

Semaglutide Injection

Semaglutide injections for weight management are delivered beneath the skin (subcutaneously), typically in the upper arm, thigh, or abdomen. This approach helps the body adjust to the medicine and support sustainable weight loss.

Step 1 – Initial dose

Treatment usually begins with a small weekly dose, such as 0.25 mg for the first month. This starting phase gives the body time to adapt to the medication.

Step 2 – Stepwise dose increase

The dosage is then raised in stages depending on the individual’s tolerance and progress:

Weeks 5–8: 0.5 mg once a week
Weeks 9–12: 1.0 mg once a week
Weeks 13–16: 1.7 mg once a week
From Week 17 onwards: 2.4 mg once a week (maintenance dose)

Doctors at AURA Clinic adjust the dosing plan according to each patient’s medical background and response to treatment.

Step 3 – Method of injection

Semaglutide is supplied in a prefilled pen and is self-injected under the skin. Patients are shown how to rotate injection sites—upper arm, thigh, or abdomen—to lower the risk of irritation and promote even absorption.

Step 4 – Consistency and timing

Injections can be administered at any time of day, with or without food. Maintaining a regular schedule by choosing the same day and time each week helps improve consistency.

Step 5 – Ongoing lifestyle guidance

Successful weight management involves more than medication. Patients also receive advice on diet, physical activity and other lifestyle adjustments to reinforce the benefits of semaglutide treatment.

Note: The steps and doses above are provided as general examples and may not apply to every individual. Patients should always consult a qualified healthcare professional for personalised medical advice before starting or adjusting treatment.

Final Thoughts: Is Semaglutide Right for You?

Semaglutide offers an effective medical option for people struggling with obesity or weight-related conditions. While it can support long-term weight management, it is not a quick fix. Pairing it with a healthy diet and exercise maximises its effectiveness.

If you’re considering semaglutide, speak to a qualified doctor in Singapore to see if it’s the right choice for your weight-loss journey. At AURA Clinic, we also offer a medical weight loss program to support your body transformation goals further.

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Frequently Asked Questions

Is semaglutide good for weight loss?

Yes. Studies show that patients on semaglutide achieve substantial weight loss.

How much weight can you lose in a month on semaglutide?

Weight loss varies by individual, but many patients see gradual reductions starting in the first month, with more noticeable results over several months.

What are the side effects of semaglutide?

The most common include nausea, vomiting, diarrhoea and constipation. These usually improve with time.

What should I do if I get side effects from my weight loss medication?

Contact your doctor immediately. They may adjust your dose or recommend ways to manage symptoms.

How long should I stay on a doctor-prescribed weight loss medication?

Duration depends on your weight-loss progress and health goals. Your doctor will monitor your condition and advise accordingly.

What happens after stopping semaglutide?

Some patients may regain weight if they stop maintaining diet and lifestyle changes. Continuous healthy habits are essential.

Can I switch from an oral weight loss medication to a weight loss injection?

Yes, but only under medical supervision. A doctor will assess whether switching is safe and beneficial for you.

The content on this website is for informational purposes only and should not replace professional medical advice. We recommend scheduling a consultation to address your concerns and receive personalised treatment recommendations. Treatment plans, results, and pricing may vary for each person and can only be accurately assessed by a doctor after a diagnosis.

Semaglutide for Weight Loss; Everything You Need to Know