Weight-Loss Drugs – Miracle or Madness?

Social media is awash with stories of dramatic physical transformations—many thanks to substantial weight loss.

In Australia, several weight-loss drugs are now approved by the Therapeutic Goods Administration (TGA). But are they miracle solutions or risky shortcuts?

Who are weight-loss drugs for?

According to the Australian Institute of Health and Welfare, two in three Australian adults were overweight or obese in 2022. This is a serious public health concern, as excess weight increases the risk of chronic conditions such as heart disease, type 2 diabetes, and certain cancers.

Doctors may prescribe weight-loss medications to patients who are classified as obese or overweight with related health conditions, particularly when diet and exercise alone have not been effective.

Some weight-loss medications, including phentermine, liraglutide, and orlistat, are approved for obesity management in Australia. However, they are not currently subsidised under the Pharmaceutical Benefits Scheme (PBS), meaning patients must cover the cost themselves.

How do they work?

Weight-loss medications work in different ways:

Saxenda (liraglutide), Wegovy (semaglutide), and Ozempic (semaglutide) are GLP-1 receptor agonists. Originally developed for managing type 2 diabetes, they also aid weight loss by slowing digestion, reducing appetite, and improving blood sugar control.
- While Ozempic is TGA-approved for diabetes, it is often prescribed off-label for weight loss.
Xenical (orlistat) works by blocking about 30 percent of dietary fat from being absorbed in the intestines, reducing overall calorie intake.
Mounjaro (tirzepatide) is a newer medication that mimics both GLP-1 and GIP (glucose-dependent insulinotropic polypeptide) hormones. It helps control blood sugar and promotes satiety, making users feel full for longer.

The Benefits

When used under medical supervision, weight-loss medications can support significant and sustained weight loss, particularly when combined with lifestyle changes. Potential benefits include:

Lower blood pressure
Improved blood sugar control
Reduced risk of cardiovascular disease
Enhanced mobility and quality of life

The Risks

These medications aren’t without downsides:

Common side effects include nausea, vomiting, diarrhoea, constipation, and fatigue.
Less common but serious side effects may include pancreatitis, gallbladder disease, or kidney issues.
Weight regain is possible, especially if lifestyle changes are not maintained after stopping the medication.

What’s the verdict?

Weight-loss drugs can be highly effective tools—but they’re not magic bullets. Their success depends on proper medical supervision, commitment to a healthy lifestyle, and realistic expectations.