Dr Nick Fuller
Leading Obesity Expert at the University of Sydney and founder of Interval Weight Loss.
If you’ve been hearing about weight loss injections like Wegovy or Mounjaro and wondering how to get them, you’re not alone. These medications are making headlines for helping people shed kilos when combined with lifestyle changes. In fact, studies show that GLP-1 receptor agonists, such as semaglutide, can support up to 15% body weight reduction over 68 weeks when paired with diet and exercise.
But before rushing to your nearest pharmacy, it’s important to know who’s eligible and the proper steps to getting started.
Weight loss injections aren’t all the same—different medications, different price tags, and slightly different mechanisms. In Australia, the most common options fall under the GLP-1 class of drugs.
Wegovy (semaglutide) – Known for being the first GLP-1 medication specifically approved for weight management, Wegovy works by mimicking a natural hormone (GLP-1) that helps control appetite and reduce cravings. Learn more about what semaglutide does here.
Mounjaro (tirzepatide) – A dual-action injection that targets both GLP-1 and GIP receptors, Mounjaro stands out for its stronger effect on blood sugar regulation and appetite control, making it a unique option for those who also have type 2 diabetes.
Other GLP-1 injections (e.g. Saxenda/liraglutide) – These typically require daily injections instead of weekly, which can suit people who prefer a more flexible dosing schedule or want an option with a longer track record of use in weight management.
Not everyone is a candidate for these medications. Eligibility is based on BMI, health conditions, and safety considerations.
Adults with a BMI of 30 or higher – Standard threshold for medical obesity treatment.
Adults with a BMI of 27 or higher plus one weight-related health condition – Conditions include high blood pressure, type 2 diabetes, high cholesterol, PCOS, or sleep apnoea.
Must be 18 years or older – These drugs aren’t approved for children or teens.
No history of medullary thyroid carcinoma or MEN2 – GLP-1 drugs carry warnings for these rare conditions.
Not currently pregnant or breastfeeding – Safety hasn’t been established in these groups.
No serious gastrointestinal disorders – Conditions like severe gastroparesis may worsen with these medications.
No severe kidney or liver disease – Clearance of the drug may be impaired.
Not currently misusing alcohol or drugs – Substance misuse can interfere with safe treatment.
Not taking interacting medications – Certain drugs, like metformin, may dangerously combine with GLP-1s.
Must be able to self-administer injections – Or have someone to help safely administer them.
Willingness to attend follow-up appointments – Regular check-ins are required to track progress and monitor side effects.
Accessing these medications isn’t as simple as walking into a pharmacy. First, you need a prescription from a licensed provider. Here’s where Australians commonly turn:
Telehealth Clinics / Online Medical Services – Platforms that offer online consultations and prescriptions.
Specialist Telehealth Clinics – Focused providers dedicated to weight management or metabolic health.
GP or Specialist Clinics – Your local doctor can provide prescriptions, especially if you have related conditions like diabetes.
Weight Management Clinics – Clinics specialising in obesity treatment often combine medication with nutrition and lifestyle support.
If you’re eligible, here’s the typical process of starting on a weight loss injection in Australia:
Find a qualified healthcare provider – Choose between a GP, specialist, or telehealth service.
Book a consultation (in-person or online) – Discuss your weight history, goals, and concerns.
Undergo medical assessment – Providers check BMI, health history, and sometimes order blood tests.
Discuss medication options and risks – Your doctor will explain benefits, side effects, and alternatives.
Receive a prescription if approved – Not everyone qualifies, but eligible patients can proceed.
Learn proper injection technique – Either self-inject at home or attend a clinic for guidance.
Obtain medication from the pharmacy – Prescriptions can be filled locally or arranged via delivery.
Schedule regular follow-up – Check-ins ensure safe progress, adjust dosage, and monitor side effects.
If you’re exploring weight loss injections, you might have more questions about side effects, diet, exercise, or treatment duration. These blog posts can help you get a clearer picture and make more informed choices:
Does semaglutide make you tired? – Understand potential side effects.
What to eat while taking weight loss injections – Nutrition guidance for best results.
Can you exercise while on weight loss injections? – Tips for combining medication with activity.
How long do you stay on weight loss injections? – Guidance on duration and tapering.
Getting weight loss injections in Australia involves more than just asking for them. It requires eligibility screening, medical oversight, and ongoing monitoring.
While medications like Wegovy and Mounjaro have shown impressive results in clinical trials, they’re not suitable for everyone. By working closely with a qualified provider, you can determine whether these injections are right for you and safely integrate them into your weight management journey.
Dr Nick Fuller is the founder of Interval Weight Loss and is a leading obesity expert at the University of Sydney with a Ph.D. in Obesity Treatment. Dr Fuller is also the author of three best-selling books and his work been published in top ranked journals in the medical field, including JAMA, Lancet and American Journal of Clinical Nutrition.