Ozempic is a prescription drug that has drawn huge attention for its weight loss effects, but access is tightly controlled. In Australia, the numbers that decide whether you’re eligible are a BMI of 30 or higher, or a BMI of 27 or higher with a weight-related health condition. Those thresholds belong to the weight-loss version of semaglutide (Wegovy), and Ozempic itself is only approved for type 2 diabetes. This guide covers what the numbers mean, what you’ll pay in 2026, and what to expect once you’re in the doctor’s chair.
What BMI Do You Need to Get Ozempic?
To be eligible for semaglutide for weight loss, you generally need a BMI of 30 or higher. If you have a weight-related health condition such as type 2 diabetes, high blood pressure or sleep apnea, a BMI of 27 or higher can be enough.
These aren’t arbitrary cut-offs. The Therapeutic Goods Administration (TGA) and comparable regulators overseas set them from trial populations in which excess weight carried clear health risks. Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist. It mimics a gut hormone that helps regulate blood sugar level and appetite, which slows digestion, makes you feel fuller and reduces food intake.
One point is often missed. Ozempic is registered in Australia for type 2 diabetes management only. Using it for weight loss is off-label use, meaning a doctor prescribes an approved medication for a purpose outside its registered indication. The BMI thresholds above come from the registration of Wegovy, the version of semaglutide approved as an anti-obesity medication, and doctors apply the same benchmarks when they prescribe Ozempic off-label.
How Do You Calculate Your BMI?
BMI stands for Body Mass Index. It’s a simple calculation that uses your height and weight to estimate whether your weight is healthy for your size.
The formula is: BMI = weight in kilograms ÷ (height in metres × height in metres).
For example, if you weigh 90 kilograms and you’re 1.7 metres tall, the calculation is 90 ÷ (1.7 × 1.7) = 31.1. That BMI sits above the threshold of 30, so you would meet the weight criterion.
You can also use an online BMI calculator that does the maths instantly. Enter your height and weight, and use measurements taken recently rather than estimates. If you’re also starting a structured plan, download the free 9-step ebook for an exercise plan, a nutrition plan and 20+ practical tips for shedding 5-10kg in 6 weeks.
What Are the BMI Categories?
Knowing where you sit on the scale tells you which options are realistic:
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese Class 1: BMI 30 to 34.9
- Obese Class 2: BMI 35 to 39.9
- Obese Class 3: BMI 40 and above
Obesity is the clinical term for the categories from 30 upward, and that is where weight loss prescriptions start without any other condition. If your BMI is between 27 and 29.9, you’ll need a documented weight-related health condition to be eligible.
Does BMI Tell the Whole Story?
Not quite. BMI is a screening tool, and it can’t tell adipose tissue (body fat) from muscle or bone. A muscular person can land in the overweight range without carrying excess fat, while someone with a normal BMI can still hold a lot of fat around the abdomen.
That is why doctors often add a waist measurement to the picture. Fat stored around the middle is linked with higher risk of diabetes and heart disease than fat stored elsewhere. Risk thresholds also differ between ethnic groups, and some guidelines flag people of Asian descent at lower BMI values. If your number sits close to a cut-off, expect your doctor to look at waist size, blood results and your overall history rather than BMI alone.
What Health Conditions Help You Qualify with a Lower BMI?
Doctors can consider semaglutide at a BMI of 27 if you have conditions such as:
- Type 2 diabetes
- High blood pressure (hypertension), which puts extra strain on the circulatory system
- High cholesterol
- Sleep apnea
- Cardiovascular disease
- Fatty liver disease
- Polycystic ovary syndrome (PCOS)
These conditions compound the health risks of excess weight. Even a modest weight loss of 5 to 10 percent can improve many of them. In the STEP 1 trial, published in the New England Journal of Medicine in 2021, adults without diabetes who took semaglutide at the 2.4 mg weekly dose used in Wegovy lost an average of about 15 percent of their body weight over 68 weeks. That is a higher dose than the Ozempic diabetes doses, so results on Ozempic can differ.
How Much Does Ozempic Cost in Australia?
The cost depends on whether you’re using it for diabetes or weight loss.
For eligible type 2 diabetes patients, Ozempic is subsidised under the Pharmaceutical Benefits Scheme (PBS). From 2026 the general PBS co-payment is capped at $25 per script, and concession card holders pay a much lower amount. PBS co-payments are adjusted regularly, so confirm the current figure with your pharmacist.
For weight loss without diabetes, Ozempic isn’t covered by the PBS. You pay the full private prescription price, commonly in the range of $130 to $140 a month at the time of writing, which adds up to roughly $1,560 to $1,680 a year. Prices vary by pharmacy and dose, and Wegovy is often priced higher.
Some private health insurance policies may offer a small rebate on extras, but most don’t cover weight loss medication. Read your insurance policy or call your insurer before assuming anything is covered.
What’s the Difference Between Ozempic and Wegovy?
Both medications contain semaglutide, but they’re registered for different purposes.
Ozempic is approved for type 2 diabetes management. When a doctor prescribes it for weight loss, that is off-label use not covered by its TGA registration.
Wegovy is registered specifically for chronic weight management and uses a higher maximum dose. Its criteria match those above: a BMI of 30 or higher, or 27 or higher with at least one weight-related condition.
Wegovy became available in Australia after a delayed launch and has had supply problems. Newer options have since arrived, including tirzepatide (sold as Mounjaro), another injectable approved for weight management. Ask your doctor which product is registered, available and appropriate for you.
Is There an Over the Counter Ozempic?
No. Ozempic is a prescription drug and cannot legally be bought over the counter in Australia. Any product sold without a prescription and marketed as “Ozempic,” “semaglutide” or a natural alternative is either unregulated or counterfeit. Fake pens have been reported internationally, so buy only from a registered Australian pharmacy on a valid prescription.
What Happens During Your Doctor’s Appointment?
Your doctor will assess more than your BMI:
- Complete medical history review
- Current medications and supplements
- Previous weight loss attempts
- Blood tests to check kidney function, liver function and blood sugar levels
- Blood pressure measurement
- Discussion of realistic weight loss goals
Meeting the BMI criteria doesn’t guarantee a prescription. Doctors generally want evidence that you’ve tried other approaches first, such as diet changes, more physical activity and working with a dietitian or exercise professional.
The medication works best as part of a comprehensive plan. Trials consistently show that people who pair semaglutide with lifestyle changes lose more weight than those relying on the drug alone.
Can You Get Ozempic Online?
Yes, several Australian telehealth services offer prescriptions after an online consultation with a registered doctor, by video call or questionnaire.
Legitimate telehealth providers will:
- Require a proper medical consultation
- Check your BMI and health history
- Order blood tests if needed
- Provide ongoing monitoring
- Issue prescriptions through registered Australian pharmacies
Be cautious of services that promise a prescription with no real assessment, or that sell medication directly from overseas. They may not be operating legally and could put your health at risk.
What Are the Side Effects You Should Know About?
Ozempic acts on your digestive system, which is where the most common side effects appear:
- Nausea (commonly reported, especially after dose increases)
- Diarrhoea
- Constipation
- Vomiting
- Stomach pain
- Reduced appetite
These usually ease after the first few weeks as your body adjusts. Starting on a low dose and increasing it gradually helps limit discomfort.
Serious side effects are uncommon but include pancreatitis, gallbladder problems and kidney issues, especially if you become dehydrated from vomiting or diarrhoea. Your doctor will monitor you regularly to catch problems early.
How Long Do You Need to Take Ozempic?
Weight loss medications like this are designed for long-term use. Research shows most people regain weight when they stop.
A 2022 follow-up of the STEP 1 trial found that participants regained about two-thirds of their lost weight within a year of stopping semaglutide. The drug changes how your body regulates hunger and fullness, and when you stop, those signals return to their earlier patterns.
Think of it as a tool for managing weight long-term, much like blood pressure medication. The aim is to reach a healthier weight and keep it with the medication’s support. It also pays to know that eating too little can actually cause weight gain, so a very low intake alongside reduced appetite can work against you.
What Results Can You Realistically Expect?
Clinical trials show a consistent pattern, though the exact figures depend on the dose and the population studied:
- Month 1 to 3: modest loss, often 2 to 4 percent of body weight
- Month 4 to 6: gradual progress, often 6 to 8 percent
- Month 7 to 12: continued loss, with averages in the 10 to 15 percent range at higher doses
For someone weighing 100 kilograms, that could mean 10 to 15 kilograms over a year. Individual results vary with starting weight, diet quality, activity levels and how your body responds.
Some people are “super responders” who lose more than 20 percent, while others lose less than 5 percent. Your doctor can adjust your dose or consider another medication if you’re not seeing results.
Frequently Asked Questions
Can I get Ozempic if my BMI is 29?
Only if you have a weight-related health condition such as type 2 diabetes or high blood pressure. Without one, the minimum BMI is 30.
Does private health insurance cover Ozempic for weight loss?
Most policies don’t. Some extras cover may offer a small rebate, but you’ll likely pay most of the cost yourself.
How quickly will I lose weight on Ozempic?
Many people notice a small loss within the first month, often 1 to 2 kilograms. Loss continues over 12 to 18 months, with the biggest changes after about 6 months.
Can I use Ozempic if I’m trying to lose the last 5 kilograms?
No. It is meant for people with obesity or significant weight-related health risks, not for people at a healthy weight wanting to lose a little.
What happens if I miss a dose?
Ozempic is injected once a week. If you miss a dose, take it as soon as you remember, provided it is within 5 days of the missed day. If more than 5 days have passed, skip it and take your next dose on the usual day. Never double up, and check the instructions on your pen or ask your pharmacist.
Will I need to take Ozempic forever?
Most people need to continue long-term to maintain their results, because stopping typically leads to regain. Discuss your long-term plan with your doctor.
Making Your Decision
What BMI qualifies for Ozempic? You need a BMI of 30 or higher, or 27 or higher with a weight-related health condition. Ozempic is only registered for type 2 diabetes, so for weight loss you are relying on off-label use or on Wegovy.
Before you book, calculate your BMI accurately, gather details of any related conditions and be ready to show the other approaches you’ve tried. If you’re paying privately, budget for about $130 to $140 a month and confirm current prices.
Medication helps control hunger and cravings, but it doesn’t replace sustainable eating and activity habits. Treat it as one tool in your weight management toolkit. For personalised guidance on reaching your health goals, consider working with a personal trainer in South Melbourne.