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WEIGHT LOSS CLINIC — BRISBANE
Weight Loss
Injections & Medications
Prescription weight loss medications have transformed what is possible in the medical management of obesity. Find out how they work, who they suit, and what to expect as part of a supervised programme at MedSurg.
A New Era in Weight Management
Prescription weight loss medications — particularly injectable treatments — represent one of the most significant advances in the medical management of obesity in decades. They do not replace healthy eating and regular movement. But for many people, they fill a crucial gap that diet and lifestyle changes alone cannot.
At MedSurg Weight Loss, medications are always prescribed as part of a supervised programme — with thorough assessment before you start, regular monitoring throughout, and allied health support available at every stage. If you are looking for a script and a send-off, this is not the clinic for you. If you want a team that stays with you, it is.
This page covers both injectable and oral prescription medications available in Australia for weight management. Due to TGA advertising guidelines, we are unable to refer to specific medication brand names — your MedSurg doctor will explain all available options in detail during your consultation.
Weight loss medications are one tool within a broader medical programme. For an overview of the full MedSurg approach — including dietitian, psychology and exercise physiology support — visit our Medical Weight Loss page.
How Injectable Medications Work
Injectable weight loss medications work by mimicking natural hormones produced in the gut after eating. These hormones — known as incretin hormones — play a key role in regulating appetite, blood sugar and digestion. By activating the same receptors in the brain and gut, the medications are able to:
The brain receives stronger signals of fullness and a reduced hunger drive — making it easier to eat less without the constant battle of willpower.
Food moves through the stomach more slowly, prolonging satisfaction after meals and reducing the urge to snack between them.
By interrupting the brain's biological counter-attack, the medications allow your body to respond to lifestyle changes that would otherwise be undermined.
These medications are administered by weekly self-injection, typically into the abdomen, thigh or upper arm. Your doctor will show you exactly how to do this — most patients find the process straightforward within the first few weeks.
What to Expect on Treatment
Injectable weight loss medications are introduced gradually and monitored throughout. Here is a general overview of what the treatment process looks like — individual programmes will vary.
Starting dose
Treatment begins at a low dose to allow your body to adjust and to minimise the chance of side effects. Most people experience minimal disruption in the first few weeks.
Dose titration
The dose is gradually increased over several weeks or months, in line with your response and tolerability. Your doctor manages this process at each follow-up appointment.
Side effect management
The most common side effects are mild digestive symptoms — nausea, reduced appetite, or changes in bowel habits. These typically ease as your body adjusts. Your team will advise on practical strategies to manage them if they occur.
Ongoing monitoring
Regular reviews assess your progress, weight loss rate and overall health. If a medication is not working or is not tolerated, your doctor will discuss alternatives. We adjust as needed — we do not set and forget.
Maintenance and long-term planning
Once you reach your goal or a stable plateau, your doctor will discuss the long-term plan — including whether to continue, adjust, or transition away from medication, and how to maintain results over time.
How much weight can you expect to lose? Results vary between individuals. Clinical studies show that many people lose a meaningful percentage of their body weight when injectable medications are combined with nutrition, physical activity and behavioural support. Long-term success depends on building sustainable habits alongside medication — which is why allied health support is a core part of the MedSurg programme.
Weight Loss Tablets
In addition to injectable medications, there are several oral prescription options available in Australia for weight management. These work through different mechanisms to injectable treatments, and may be recommended depending on your individual health profile, preferences, or circumstances.
There are three main mechanisms by which oral weight loss medications work:
Reducing the hunger drive
Some oral medications act on the central nervous system to suppress appetite, reducing the urge to eat and making it easier to maintain a calorie deficit over time.
Reducing food cravings
Certain medications target the reward pathways in the brain that drive cravings — particularly for high-calorie or processed foods — making it easier to make consistent food choices.
Blocking fat absorption
One class of oral medication works in the digestive system to prevent a portion of dietary fat from being absorbed, reducing the total calorie load from fat-containing foods.
Oral GLP-1 receptor agonist medications — the same class as some injectable treatments — are an emerging option and are expected to become more widely available in Australia in coming years. We will update our programme as new options become accessible.
Injections or Tablets — Which Is Right for You?
There is no universal answer. The most appropriate option depends on your individual health history, weight loss goals, other medications, lifestyle, and personal preferences. Your MedSurg doctor will discuss all available options with you and make a recommendation based on your full clinical picture.
As a general guide, here is how the two broad categories compare:
Injectable Medications
May suit you if…
- You are looking for the strongest available evidence base for weight loss
- You have significant weight to lose or obesity-related health conditions
- You are comfortable with a weekly self-injection
- Previous oral medications have not been effective for you
- You want once-weekly dosing rather than a daily tablet
Oral Medications
May suit you if…
- You prefer an oral option over self-injection
- You have a specific type of eating behaviour — such as cravings or emotional eating — that an oral medication targets directly
- Injectable treatments are contraindicated for your health
- You are earlier in your weight management journey and looking for additional support
- Cost or access to injectable options is a factor
Options are not mutually exclusive. Some patients use a combination of injectable and oral medications at different stages of their programme. Your doctor will review what is working and adjust accordingly — there is no single path that fits everyone.
Who Is Eligible?
Medical treatment for obesity is guided by clinical criteria. As a general guide, prescription weight loss medications may be appropriate if you meet one of the following:
- BMI greater than 30 kg/m²
- BMI greater than 27 kg/m² and an obesity-related condition such as type 2 diabetes, high blood pressure, high cholesterol or obstructive sleep apnoea
These thresholds are lower for people of certain ethnic backgrounds, including South and East Asian populations. Your doctor will take your full background and health history into account during assessment.
Many patients also come to us after years of unsuccessful dieting, significant weight regain, or without meeting strict BMI criteria — and still benefit meaningfully from a medically guided programme. The best way to find out if this is right for you is to book an initial consultation.
Your First Appointment
No referral is needed to book. At your initial consultation, your MedSurg doctor will:
- Review your full medical history, current medications and previous weight loss attempts
- Discuss your weight history, eating patterns, lifestyle and goals
- Perform a physical examination and order relevant metabolic testing
- Explain all suitable medication options — including benefits, risks and realistic expectations
- Discuss whether allied health referrals — dietitian, psychologist, exercise physiologist — would complement your programme
No medication will be prescribed without this assessment. We take the time to get the picture right before making recommendations.
Ready to get started?
Book an appointment with our team today. No referral needed.
Or call us: (07) 3373 0265
Ready to start your journey?
Take the first step towards lasting change. Book a consultation with our team today and discover a personalised approach that works for you.