Weight Loss Management Using GLP-1 Medicines: What You Need to Know

Losing weight is not always as simple as eating less and exercising more. For some people, weight management can be difficult despite making consistent changes to their diet and physical activity. Factors such as genetics, hormones, medications, medical conditions, appetite and lifestyle can all play a role.

In recent years, GLP-1 medicines have received significant attention as an option for medically supervised weight management. These medicines can help some people manage their appetite and support weight loss when used alongside healthy eating and regular physical activity.

But GLP-1 medicines are not suitable for everyone, and they are not a quick fix. Understanding how they work, who may benefit and why medical supervision is important can help you have a more informed conversation with your GP.

What Are GLP-1 Medicines?

GLP-1 stands for glucagon-like peptide-1, a hormone naturally produced by the body. It plays a role in appetite, digestion and blood glucose regulation.

GLP-1 receptor agonist medicines work by mimicking some of the effects of this naturally occurring hormone. They can help increase feelings of fullness, reduce appetite and slow the movement of food through the stomach.

Some medicines in this group are used primarily to manage type 2 diabetes, while others are approved in Australia for chronic weight management.

Medicines currently marketed in Australia include semaglutide and liraglutide, as well as tirzepatide, which acts on both GIP and GLP-1 pathways. Products approved for chronic weight management include Wegovy, Saxenda and Mounjaro, subject to their individual approved indications.

How Can GLP-1 Medicines Support Weight Loss?

One of the main ways GLP-1 medicines can support weight management is by influencing appetite and feelings of fullness.

Some people taking these medicines find that they feel satisfied with smaller meals or experience less hunger between meals. This can make it easier to reduce overall food intake while working towards healthier eating habits.

The medicines are intended to be used as part of a broader weight-management plan rather than replacing healthy lifestyle habits.

For example, a weight-management plan may include:

• Balanced and nutritious meals

• Regular physical activity

• Adequate sleep

• Behaviour and lifestyle changes

• Monitoring weight and other health measurements

• Regular appointments with a healthcare professional

The Therapeutic Goods Administration (TGA) states that approved weight-loss medicines are intended to support, rather than replace, healthy eating and physical activity.

Who May Be Considered for GLP-1 Weight Management?

GLP-1 medicines are not appropriate simply because someone wants to lose a few kilograms.

Whether medication is appropriate depends on several factors, including a person's weight, BMI, overall health, existing medical conditions, medications and previous attempts at weight management.

For example, the TGA-approved indication for Wegovy includes adults with a BMI of 30 kg/m² or greater, or adults with a BMI between 27 and less than 30 kg/m² who have at least one weight-related health condition. Mounjaro has a similar approved indication for chronic weight management.

Your GP can assess your individual circumstances and discuss whether medication is appropriate for you.

A medical consultation is important because weight is only one part of your overall health.

GLP-1 Medicines Are Not a "Quick Fix"

There has been a lot of discussion about GLP-1 medicines on social media, with some advertisements presenting them as an easy way to lose weight.

The reality is more complicated.

Weight management is a long-term process. Medication may help with appetite and weight loss for some people, but it does not replace healthy habits or regular medical care.

Your GP may also consider other factors such as blood pressure, blood glucose, cholesterol, sleep, physical activity, diet and any existing health conditions.

The goal should not simply be a number on the scales. Improving overall health and reducing the impact of weight-related health conditions are important parts of long-term weight management.

What About Side Effects?

Like all medicines, GLP-1 medicines can cause side effects.

Some people may experience gastrointestinal symptoms such as nausea, vomiting, diarrhoea, constipation or abdominal discomfort, particularly when starting treatment or changing doses.

Your doctor will consider your individual medical history before prescribing treatment and will discuss potential benefits and risks with you.

GLP-1 and related medicines can also delay stomach emptying. This is particularly important if you are having surgery or a procedure involving general anaesthesia or deep sedation. The TGA advises patients taking these medicines to tell their healthcare professionals and anaesthetists before such procedures.

The TGA also updated safety information in 2026 concerning a rare but serious eye condition called non-arteritic anterior ischaemic optic neuropathy (NAION). The evidence and risk differ across medicines, so patients should discuss relevant risks with their healthcare professional rather than relying on information from social media or online advertisements.

Why Medical Supervision Matters

It can be tempting to look online for GLP-1 products, particularly when they are promoted through social media.

However, this can carry significant risks.

In March 2026, the TGA warned about counterfeit imported weight-loss products that claimed to contain GLP-1 medicines but testing found that some did not contain GLP-1 or GLP-1 analogues at all. The TGA recommends obtaining prescription medicines through legitimate Australian sources and using them under medical supervision.

A GP can help determine whether a GLP-1 medicine is appropriate, explain how it should be used and monitor your progress.

Medical supervision also provides an opportunity to review how you are responding to treatment and whether changes to your management plan are needed.

GLP-1 Treatment and Healthy Lifestyle Changes

Medication works best as part of a broader approach to health.

Your GP may discuss practical changes that fit into your everyday routine rather than recommending extreme diets or unrealistic exercise plans.

This may include increasing vegetables and fibre, choosing appropriate sources of protein, reducing highly processed foods, improving portion awareness and finding physical activities that you can maintain over time.

Exercise is also important for overall health and can help support muscle strength and fitness during weight loss.

Small, sustainable changes are often more realistic than trying to completely change your lifestyle overnight.

Weight Management Is Individual

There is no single weight-loss approach that works for everyone.

Two people with similar body weights may have very different health histories, medications, eating patterns and reasons for gaining weight.

This is why a personalised approach is important.

Your GP may consider your:

• Medical history

• Current medications

• BMI and weight history

• Blood pressure and metabolic health

• Blood glucose levels

• Lifestyle and eating patterns

• Previous weight-management attempts

• Existing weight-related health conditions

• Personal goals and preferences

This information can help your doctor determine what approach may be appropriate.

The RACGP recognises general practice as having an important role in the prevention and management of obesity and in helping patients access evidence-based treatment and support.

What Can You Expect From a Weight Management Consultation?

If you are considering GLP-1 treatment, your first appointment is an opportunity to discuss your health and goals with your GP.

You may be asked about your medical history, current medications, previous attempts at weight loss, eating habits, physical activity and any symptoms or health concerns.

Your GP may also recommend health checks or blood tests where appropriate.

From there, your doctor can discuss the different options available and whether a GLP-1 medicine may be suitable for you.

Treatment should be regularly reviewed rather than started and left unmanaged.

Talk to Your GP About Weight Management

If you have been struggling with your weight despite making lifestyle changes, you do not have to navigate the process alone.

GLP-1 medicines may be an option for some people, but they should be considered as part of an individualised healthcare plan.

At Classic Way Family Practice, our team can help you understand your weight-management options and discuss whether medical treatment may be appropriate for your individual circumstances.

A conversation with your GP is a good place to start. Together, you can look at your overall health, your goals and the different approaches available.

Contact Classic Way Family Practice

If you have questions about weight management, GLP-1 medicines or your overall health, the team at Classic Way Family Practice is here to support you.

Classic Way Family PracticePhone: (07) 5568 0600

Email: [email protected]

Address: 2/6 Classic Way, Burleigh Waters QLD 4220

Opening HoursMonday to Friday: 7:30 AM – 5:00 PM

Sunday & Public Holidays: 9:00 AM – 1:00 PM

Contact our friendly team to make an appointment and discuss your individual weight-management needs.