Ozempic (Semaglutide) in Singapore: A Patient Guide

Medically reviewed by Dr Michael Ross MacDonald – The Harley Street Heart & Vascular Centre. Last reviewed: August 2026

Key Facts

  • Ozempic (semaglutide) is registered for type 2 diabetes; in Singapore about 9% of adults aged 18–74 have diabetes (MOH National Population Health Survey 2024).
  • In the STEP 1 obesity trial, semaglutide 2.4 mg produced an average body-weight reduction of about 15% over 68 weeks, alongside documented effects on blood glucose.
  • Trial figures are averages - individual results vary.

Overview

Ozempic is a brand name for semaglutide, a once-weekly injectable medicine in the GLP-1 receptor agonist group. In Singapore it is a prescription medicine registered for the management of type 2 diabetes. It works by mimicking glucagon-like peptide-1 (GLP-1), a natural hormone released by the gut after eating that helps the body regulate blood sugar.

Because Ozempic is a prescription-only medicine, it is started and supervised by a doctor as part of a wider treatment plan. This article is general patient education and is not a substitute for personalised medical advice. Your doctor will consider your individual circumstances before recommending any treatment.

Ozempic vs Wegovy vs Mounjaro

There is understandable confusion about these names because they are related but distinct:

  • Ozempic = semaglutide, dosed for type 2 diabetes
  • Wegovy = the same active drug (semaglutide), dosed and registered for weight management
  • Mounjaro = tirzepatide, a different, dual-acting medicine

These are not interchangeable. The active ingredient, the registered indication and the dosing schedule differ, so one cannot simply be substituted for another. Your doctor will advise which, if any, applies to you, based on your diagnosis and treatment goals. You can read more in our notes on GLP-1 Medicines, Wegovy and Mounjaro.

Why it's used

  • To help improve blood glucose control in adults with type 2 diabetes
  • As one part of a plan that also includes diet, physical activity and, where needed, other diabetes medicines
  • In some treatment plans, to support broader metabolic goals that your doctor will explain

Some people may also experience changes in weight while taking it. Whether and how this is relevant to you is something your doctor will discuss, as Ozempic itself is registered in Singapore for diabetes rather than for weight management.

How it works

Semaglutide acts in several ways that together help lower blood glucose:

  • Prompts the pancreas to release insulin when blood glucose is raised
  • Lowers glucagon, a hormone that signals the liver to release sugar
  • Slows the rate at which the stomach empties, which can increase the sense of fullness after meals
  • Acts on appetite centres in the brain, which may reduce hunger

Because insulin is released in response to raised glucose rather than constantly, the risk of low blood sugar (hypoglycaemia) from Ozempic alone is generally lower than with some other diabetes medicines. That risk can rise if it is combined with certain other treatments, such as insulin or sulfonylureas, which is one reason ongoing review matters.

Who may be suitable

Suitability is assessed individually. Your doctor will consider your medical history, current blood glucose levels and HbA1c, kidney and other organ function, the other medicines you take, any history of pancreatitis or thyroid conditions, and your personal goals. Ozempic is not suitable for everyone, and a careful assessment is part of safe prescribing.

Risks and side effects

As with any medicine, side effects are possible. Many are related to the digestive system and tend to be more noticeable when the dose is first increased, often settling over time.

  • Common: nausea, vomiting, diarrhoea, constipation, reduced appetite - frequently as the dose increases
  • Less common: gallbladder problems (such as gallstones), inflammation of the pancreas (pancreatitis)
  • Other considerations: dehydration from vomiting or diarrhoea, possible effects on kidney function, and interactions with other glucose-lowering medicines
  • Not suitable for people with a personal or family history of medullary thyroid carcinoma, or with multiple endocrine neoplasia type 2 (MEN2) syndrome

Seek prompt medical advice if you develop severe or persistent abdominal pain, ongoing vomiting, signs of an allergic reaction, or any symptom that concerns you. This list is not exhaustive; the medicine's package insert and your doctor are fuller sources.

Before you start

A consultation is used to confirm eligibility, screen for contraindications, review your other medicines for possible interactions, and plan how your treatment will be monitored. Your doctor may arrange blood tests before and during treatment.

Ozempic should never be self-sourced online, bought from unverified sellers, or shared between people. Medicines obtained outside proper channels may be counterfeit, incorrectly stored or unsafe, and using them without supervision can be harmful. In Singapore, supply is regulated, and a genuine prescription and pharmacy supply chain help safeguard quality.

What to expect

The dose is usually started low and increased gradually over a number of weeks. This stepwise approach is intended to reduce digestive side effects and help your body adjust. The injection is given once a week, on the same day each week, and can be taken with or without food.

At follow-up reviews, your doctor will track your response, how well you are tolerating the medicine, your blood glucose readings and overall progress, and will adjust the plan as needed. It is helpful to keep a note of any side effects and to bring a list of your current medicines to each visit.

Living with Ozempic day-to-day

Practical habits can make treatment more manageable:

  • Injection technique: your doctor or nurse will show you how to use the pen, rotate injection sites (for example, abdomen or thigh), and store it correctly, including refrigeration where required
  • Timing: choosing a consistent weekly day, and setting a reminder, can help you stay on schedule. If a dose is missed, follow the guidance you were given rather than guessing
  • Eating well: smaller, slower meals and avoiding very rich or greasy food may ease nausea, especially after a dose increase
  • Hydration: drinking enough fluids matters, particularly if you experience vomiting or diarrhoea
  • Other medicines: because Ozempic slows stomach emptying, tell your doctor and pharmacist about all your medicines, as timing of some may need attention

Ozempic is intended to work alongside, not replace, healthy eating, regular physical activity, adequate sleep and not smoking. These measures remain central to managing type 2 diabetes.

What to discuss with your doctor

Bringing the right information to a consultation helps your doctor advise you well. Consider discussing:

  • Your full medical history, including any pancreas, gallbladder, kidney or thyroid conditions
  • All medicines and supplements you take, including insulin or sulfonylureas
  • Whether you are pregnant, planning pregnancy or breastfeeding, as GLP-1 medicines are generally not used in these situations
  • Any past difficulties with diabetes medicines or injections
  • Your personal goals, concerns and questions about cost, monitoring and what success would look like for you

Results

Effects vary from person to person, and no outcome can be guaranteed. Any figures cited in clinical sources reflect published trial averages alongside continued lifestyle measures, and your own experience may differ. Sustained benefit generally depends on ongoing treatment and lifestyle habits; your doctor will help you understand what is realistic in your situation.

Frequently Asked Questions

Is Ozempic available in Singapore?

It is a prescription-only medicine; availability is confirmed by your doctor and follows Health Sciences Authority (HSA) registration and supply rules.

Can I use Ozempic for weight loss?

Ozempic is registered for type 2 diabetes. The version dosed for weight management is Wegovy - your doctor will advise what is appropriate for you.

How is Ozempic taken?

As a once-weekly injection under the skin. Your doctor or nurse will show you how to use the pen and where to inject.

What should I do if I miss a dose?

Follow the specific instructions you were given when starting treatment. In general there is guidance on how soon a missed dose can be taken before it should instead be skipped, but you should confirm this with your doctor or pharmacist rather than doubling up.

Can I drink alcohol while taking Ozempic?

There is no absolute rule, but alcohol can affect blood sugar and may worsen nausea. Your doctor can give advice suited to your situation.

Do I need to keep following a diet and exercising?

Yes. Ozempic is intended to support, not replace, healthy eating and physical activity, which remain an important part of managing type 2 diabetes.

How long will I need to take it?

This varies. Type 2 diabetes is usually a long-term condition, and your doctor will review whether to continue, adjust or change treatment over time.

Related reading: GLP-1 Medicines; Wegovy; Mounjaro

Medical Resources & References

  • Cleveland Clinic - GLP-1 agonists - https://my.clevelandclinic.org/health/treatments/13901-glp-1-agonists
  • MOH - National Population Health Survey 2024 - https://www.moh.gov.sg/others/resources-and-statistics/national-population-health-survey–nphs–2024-report/