- Home
- Weight Loss Injection
Weight Loss Injection and Medications
The official GLP-1 weight loss injection pen is now available at Halley Body Slimming Clinic!
The importance of weight loss medications
Weight loss medications and pens are prescribed as part of a medical strategy for individuals who are overweight or living with obesity. Beyond addressing physical appearance, these medications support improvements in overall health by targeting biological factors that make sustained weight loss difficult.
Medical role in obesity care
Obesity is recognised as a chronic condition influenced by genetics, hormones, and metabolism. Weight loss medications help address these root causes, rather than relying solely on willpower or calorie restriction.
Restoring balance between body and brain signals
Some weight loss medications work by targeting the brain’s hunger and fullness pathways, helping to regulate appetite signals and reduce persistent food-related thoughts.
Supporting chronic disease prevention
Sustained weight loss can help reduce the risk of conditions such as Type 2 diabetes, high blood pressure, gallstones, Gastroesophageal reflux disease (GERD), certain cancers, and even mental health issues. When lifestyle changes alone are not enough, medication can serve as an additional support to achieve these health goals.
Complementary to lifestyle changes
Weight loss medications are typically prescribed alongside consistent lifestyle adjustments such as healthier eating, increased physical activity, and improved sleep routines. A doctor-guided plan ensures that all components are integrated safely and appropriately.
Weight loss injection in Singapore
A weight loss injection pen is a doctor-prescribed medication used to support individuals in their weight management journey. At Halley Body Slimming Clinic, this treatment is part of a medically supervised weight management plan tailored to each individual’s health profile and goals.
Beyond supporting weight reduction, these injections are also used as a form of medical treatment of obesity, a chronic condition associated with increased risk of serious health issues such as major adverse cardiovascular events. Addressing obesity through such therapies can be a critical step toward improving long-term health outcomes.
There are several types of weight loss injection pens available in Singapore, including formulations that contain glucagon-like peptide-1 (GLP-1) receptor agonists such as liraglutide and semaglutide, as well as tirzepatide which contains both GLP-1 and glucose-dependent insulinotropic polypeptide (GIP). These medications work by influencing the body’s appetite regulation and curbing food cravings, helping individuals manage calorie intake while maintaining satiety.
Depending on the formulation prescribed by the doctor, slimming injection patients in Singapore will either inject the medication once daily or weekly. Each option requires medical assessment and close monitoring by a doctor to ensure safety and appropriate use.
The use of such injections for weight loss is backed by clinical evidence and is only initiated following a thorough health consultation with a doctor, dosage planning, and patient education.
Regulatory note: All medications used are approved by the US Food and Drug Administration (US FDA) and dispensed under medical supervision in Singapore.
How do weight loss injections work?
Mechanism of action
Weight loss injections work by mimicking the action of natural appetite regulating hormones, such as GLP-1. These hormones communicate with the brain to signal fullness and delay stomach emptying, promoting a feeling of satiety. Some newer weight loss injection medications act like both GLP-1 and GIP hormones. Both types of weight loss injection medications reduce hunger and cravings, as well as control blood sugar levels. These hormone-based weight management medications also indirectly enhance metabolism regulation, which helps to convert nutrients into energy and help us to lose weight.
GLP-1 function
There are two types of GLP-1 weight loss injection pen, each containing a different active ingredient that mimicks the GLP-1 receptor agonists hormone. The GLP-1 weight loss injection pen helps us lose weight by sending signals to our brain to slow digestion, reduce appetite, and make us feel full for longer. This mechanism supports delayed gastric emptying, reducing the tendency to overeat and improving adherence to a reduced-calorie diet.
Dual hormone action (GLP-1 and GIP)
Some weight loss injections combine the actions of two naturally occurring gut hormones—GLP-1 and GIP—involved in appetite and energy balance instead of just one hormone. GLP-1 primarily delays gastric emptying and promotes satiety, while GIP enhances the body’s regulation of glucose and lipid metabolism, improving overall metabolic control. This enables our body to burn energy instead of storing it as fat.
Improved insulin control for weight loss
These medications improve the body’s insulin response and stabilise blood sugar levels by enhancing glucose-dependent insulin secretion and reducing glucagon release. This helps prevent the sharp rises and drops in glucose that can trigger hunger and cravings, leading to binge eating. We are also less likely to overeat as a result, which in turns help us to manage our appetite better, reduce calorie intake, and lose weight.
Active ingredients used in weight loss injections
Liraglutide
This active ingredient mimics the GLP-1 hormone and is administered as a once-daily weight loss injection. It has a half-life of about 13 hours, which is why daily dosing is required to maintain therapeutic levels.
Other than weight loss, liraglutide has been shown to reduce the risk of major adverse cardiovascular events by 13%, according to a study published in “The New England Journal of Medicine“. Several clinical studies have also showed its efficacy of liraglutide in reducing weight.
In the “Liraglutide Evidence in Nondiabetic and Diabetic Individuals” or SCALE study, participants without type 2 diabetes who took 3.0 mg of liraglutide daily for 56 weeks lost an average of 8.0% of their body weight, compared to 2.6% in the placebo group.
Semaglutide
Another medication that also mimics GLP-1 receptor agonist is the semaglutide weight loss injection pen. It has a half-life of about seven days which means it only needs to be injected weekly rather than daily, offering convenience for patients.
Based on the STEP 8 clinical trial, participants receiving the semaglutide weight loss injection pen at a full dose of 2.4 mg saw an average weight reduction of 15.8%.
Tirzepatide
This active ingredient combines the action of both GLP-1 and GIP receptors, offering a dual effect that has broader benefits, particularly in appetite control and blood sugar regulation. It is administered once weekly and has shown results in clinical studies.
In the “Tirzepatide Once Weekly for the Treatment of Obesity” study, patients experienced weight loss of 15% (at 5 mg dose), 20% (at 10 mg dose), and 21% (at 15 mg dose) over a 72-week period.
All prescription weight loss injection medications are paired with lifestyle and dietary guidance, which will be provided during your consultation. Doctors typically start patients on a low starting dose to reduce side effects before gradually increasing to the recommended dosage.
Your doctor will advise on a dosing schedule appropriate for you during consultation.
Oral weight loss medication
For individuals who prefer not to use injectable treatments, oral weight loss medications offer a familiar alternative of taking tablets. These options work through similar pathways to support appetite regulation, cravings, and metabolic control under medical supervision.
Oral semaglutide tablets (GLP‑1 type)
These tablets contain semaglutide, the same active ingredient found in injectable GLP-1 weight loss medications. Taken daily, they help to regulate appetite regulation and slow gastric emptying. Patients typically start from a lower dose, that is adjusted gradually based on tolerability.
Oral combination tablets (Bupropion and Naltrexone)
This daily prescription medication combines two components that target the brain’s reward and appetite centres. It may be suitable for individuals who struggle with food cravings or have weight-related health concerns.
Your doctor will assess your BMI, health profile, and lifestyle preferences before recommending an appropriate oral weight loss medication. Regular monitoring is required for safety and progress tracking.
Who may be a suitable candidate?
BMI guidelines
Weight loss can help reduce the risk of chronic diseases for people who are overweight or obese. According to the World Health Organisation (WHO), a BMI of 23 or more is considered overweight for Asian populations, while a BMI of 27.5 or higher is classified as obese. Weight loss injections may be considered for individuals with:
- BMI ≥ 27 with obesity-related health conditions like high blood pressure, prediabetes, or elevated cholesterol
- BMI ≥ 30 without other health conditions
Doctor’s role in assessment
Eligibility is not determined by BMI alone. A doctor will evaluate medical history, lifestyle, and other health-related concerns to determine if medically supervised weight management is appropriate.
Special considerations
Weight loss injections may not be recommended for certain individuals with certain health concerns. It is recommended that you consult a doctor who will do a comprehensive health assessment that is necessary before beginning treatment.
Benefits of weight loss injections under medical supervision
Range of approved medications
We offer a range of weight loss medications, including weight loss injection pens and oral medications, that are approved by health authorities such as the US FDA. These options are selected based on individual needs, medical assessments, and treatment goals.
Doctor-led, individualised plans
All medications are prescribed by our doctors, who assess each patient’s condition, health status, and body goals before recommending a treatment plan. Dr Terence Tan and our medical team understand the complexity of weight management, and work closely with patients to ensure treatment is suitable and safe for their needs.
Integrated slimming support
Medications are paired with nutritional guidance, lifestyle advice, and optional meal replacement products. These help patients manage calorie intake while maintaining balanced nutrition. Each patient also receives Halley’s Slimming Booklet, a practical guide that includes progress tracking tools, goal-setting strategies, and tips for eating and activity.
Personalised treatment options beyond medication
To complement their weight loss journey, patients have the option to include body treatments based on their goals. These include:
• Body contouring
• Skin tightening
• Muscle toning
These treatments are planned as part of a broader approach to help patients reach their target weight and shape in a way that is aligned with their personal health journey.
Note: All medications and treatments are prescribed and administered under medical supervision in accordance with Singapore’s regulatory guidelines.
What to expect during treatment
Initial consultation
Your journey begins with a scheduled medical consultation. The doctor will perform a full health assessment, including body composition tracking, and evaluation of your BMI and medical history. Your doctor will then determine if you are a suitable candidate for the weight loss medication.
Injection guidance
Depending on the medication prescribed, you may be prescribed either a daily or weekly weight loss injection using a pre-filled pen. You will also be taught how to attach the needle to the pen, the proper injection techniques, and when to inject the medicine, including the preferred injection sites (abdomen, thighs, upper arms).
During consultation, your doctor will also walk you through some of the lifestyle changes to support your goals for weight loss and improved health.
Follow-up appointments
Regular follow-up appointments help monitor treatment progress, review weight changes, and adjust dosage as needed.
Lifestyle coaching
Support continues beyond the injection. Our doctor will share lifestyle and diet changes as part of our clinic’s multi-disciplinery approach to weight loss. Weight management programmes are also available if patients require ongoing weight management strategy adjustments during their weight loss journey.
Disclaimer: This information is general guidance only. Always follow your doctor’s instructions as these are prescribed medications which need to be taken with supervision by doctors.
Possible side effects of weight loss injections
Like any medication, weight loss injections may cause side effects but not everyone will experience them. Most side effects are mild to moderate, and tend to resolve as the body adjusts to the treatment. Patients usually start off on a low, starting dose before gradually stepping up to the full dose to minimise any side effects.
It is recommended that you share your experience with your doctor so that he or she can advise you accordingly.
Nausea and vomiting
This is the most frequently reported side effect, especially when first starting treatment or increasing the dose. It typically improves within a few weeks as the body adapts to the medication.
It helps to eat smaller meals and reduce intake of spicy, fatty and fried food.
Bloating and constipation
Some patients experience digestive discomfort such as bloating or constipation due to slower gastric emptying. Staying hydrated and a fibre-rich diet may help ease these symptoms.
Diarrhoea
Occasionally, patients may experience loose stools or mild diarrhoea. These effects are usually temporary and can be managed by adjusting food intake and meal timing.
Because response differs from person to person, doctor supervision is essential throughout the treatment period. Regular check-ins allow for dosage adjustment and ensure any side effects are managed safely.
Note: This information is for general awareness only. Always follow your doctor’s instructions and the official patient leaflet provided with your medication.
Book a medical consultation at Halley Body Slimming Clinic
At Halley Body Slimming Clinic, every weight loss injection plan begins with a thorough doctor consultation. We take time to understand your body concerns, medical history, and personal goals. With a focus on safe doctor-supervised treatment, we’ll help you explore suitable options and guide you through your personalised care plan in Singapore.
Schedule your consultation to take the first step towards a medically guided weight management solution.
Claim your ideal body now!
Ready to achieve your dream body? Take the first step towards a slimmer you! Call our dedicated medical team and body slimming consultants. Don't wait! Start feeling confident in your own skin today.
Frequently asked questions
Do I need to adjust my diet or lifestyle during treatment?
Yes, weight loss injections are intended to be used with a calorie-conscious diet and physical activity. At Halley Body Slimming Clinic, we support patients with holistic lifestyle planning alongside treatment. Learn more abour our weight management clinic in Singapore.
When can I expect to notice changes after starting treatment?
You will gradually lose weight as you take the medication. You should also feel a drop in appetite when you start your medication. Regular monitoring and guidance will help track your progress.
Speak to our doctor or clinic team about Halley’s Body Slimming Booklet, a guide created by our weight management clinic team to accompany every weight loss patient who visits our clinic. This guide helps you to set realistic weight loss goals and track your progress. It also includes practical eating and exercise tips to help you in your weight loss journey, alongside the other treatments, such as body contouring, skin tightening, and muscle toning, to achieve a shapely and healthier-looking body.
How much weight can I expect to lose?
Outcomes depend on many factors, including the type of weight loss medication prescribed, your dosage, consistency, and lifestyle factors. Your doctor can help to set realistic expectations and adjust the plan as needed.
How are GLP-1 weight loss medications prescribed at Halley Body Slimming Clinic?
GLP-1 weight loss medications at Halley Body Slimming Clinic are prescribed by our doctor during your medical consultation and monitored through regular follow-up reviews with the doctor. Our licensed weight loss doctor evaluates suitability before prescribing treatment, with ongoing monitoring to assess response, tolerance, and dosage adjustments where appropriate.
Can weight loss injections be combined with body sculpting treatments?
Yes, weight loss injections can complement other treatments. Speak to your doctor to see how weight loss injections can be integrated with treatments like body sculpting to shape your body contour by removing unwanted bulges of body fat.