Weight loss can be difficult, especially when diet and exercise alone don’t deliver results. For many New Zealanders, prescription medications like Ozempic and Mounjaro are offering new tools for managing weight more effectively.
These medications work by targeting hormones that control appetite and digestion, helping people eat less and feel full for longer. But they’re not a quick fix. They are part of a broader strategy that includes healthy eating, regular exercise, and medical supervision.
Let’s explore how they work, what benefits they offer, and what to consider before starting.
What is Weight Loss Medications?
These weight loss medicines are prescription medications and are part of broader obesity treatment options. They are designed for adults with a BMI of 30+ or 27+ with weight-related health issues such as type 2 diabetes or cardiovascular risk. These treatments support chronic weight management and work by:
Reducing appetite
Increasing satiety
Regulating blood sugar levels
Clinical studies have shown that these weight loss medicines are effective for patients when compared to inactive treatment (placebo), supporting their use as part of medical obesity treatment.
They aren’t magic bullets. For lasting results, you need a balanced diet, regular exercise, and medical supervision.
Note: In June 2025, Medsafe approved semaglutide (Wegovy/Ozempic) for weight management in New Zealand, though it is not funded by Pharmac. Patients pay the full cost through private prescription and pharmacy pricing. Similar medications are also available. Patients should review the prescribing information and discuss any medical questions with their healthcare provider.
Understanding Ozempic for Weight Loss Medication
Ozempic was first used to treat type 2 diabetes. It contains semaglutide, which mimics a hormone called GLP-1. This hormone helps regulate appetite, insulin production, and the speed at which food leaves your stomach.
Ozempic helps with weight loss by:
Lowering appetite and reducing food cravings
Making you feel full faster and for longer
Clinical trials have shown that Ozempic can help people lose up to 15% of their body weight over time when used alongside diet and exercise. Although originally developed for diabetes, its success in weight management has made it a popular choice worldwide and it is now approved to be used as weight loss medications in New Zealand.
What is Mounjaro Weight Loss Drug?
Mounjaro contains the active ingredient tirzepatide, which affects two key hormones – GLP-1 and GIP – that regulate hunger and insulin. Mounjaro is a prescription medication.
It works similarly to Ozempic and other similar medications but with an added effect on GIP, which may enhance weight loss and insulin sensitivity for the patient.
Here’s how Mounjaro supports weight loss for the patient:
Reduces appetite and increases satiety
Slows digestion so you feel fuller for longer
Helps regulate blood glucose more effectively
Mounjaro is administered as a weekly injection and is self-administered by the patient at home, offering convenience and autonomy in long term treatment.
In international clinical studies, Mounjaro was compared to inactive treatment (placebo), and patients using Mounjaro lost up to 20–22% of their body weight on higher doses. These clinical studies support its efficacy. While Mounjaro is not yet fully approved for weight loss use in New Zealand, it is under review by Medsafe.
Benefits of Weight Loss Medicines
When prescribed appropriately, medications like Ozempic and Mounjaro offer a range of health benefits beyond just weight loss.
1. Effective weight loss support
Most users see 10–20% body weight reduction over time
Helps reduce daily calorie intake by curbing hunger
2. Blood sugar control
Particularly beneficial for those with type 2 diabetes
May reduce the need for other diabetes medications
3. Cardiovascular health
Weight loss can lower blood pressure and cholesterol
Reduces risk of heart disease and stroke
4. Physical wellbeing
Improved energy, mobility, and stamina
Better sleep and reduced joint strain
5. Mental health
Many users report improved confidence and mood
Reaching weight goals often boosts long-term motivation
6. Clinical backing
Both drugs are supported by global research and local regulatory bodies such as Medsafe and Pharmac
Side Effects to Take Note
Yes, as with any medication. Most side effects are mild and temporary, including:
Nausea
Diarrhoea
Constipation
Headaches
In rare cases, more serious effects like pancreatitis or allergic reactions may occur. It’s important to stay hydrated and report any concerns to your doctor immediately.
Start Your Weight Loss Journey with Southern Weight Loss
If you’re considering weight loss medication like Ozempic or Mounjaro, it’s important to work with professionals who understand your unique needs. At Southern Weight Loss, we offer personalised consultations and medical support tailored to your health goals. Our team helps you navigate treatment options that are safe and supported by clinical evidence. We’re focused on long-term results that support your overall well-being.
Ready to take the next step? Contact Southern Weight Loss to book a consultation and learn more about your options. We’re here to guide you through the process and answer your questions. Let our experienced team help you build a sustainable path to better health. Your journey starts with one simple conversation.
Southern Weight Loss is here to assist you! Our specialist has been very helpful in making changes to our customers’ lives. Not only has this trip changed their body, but it has also given them more confidence and a better sense of well-being. Looking ahead, there is still a strong desire to keep these good changes going, which will lead to a healthier and happier future. Contact us today for a free consultation!