Ozempic, Wegovy and Mounjaro: 6 Myths About Weight Loss Injections Debunked

Weight loss drugs are having a serious moment. From dinner table chats to TikTok reels, names like Ozempic, Wegovy and Mounjaro are being tossed around like they’re the latest must-have wellness gadgets—and for good reason.

These injections promise big results, but as the hype grows, so does the misinformation. Are they miracle cures or just the next health fad?

To help separate fact from fluff, we’ve got Dr Donald Grant, GP and Senior Clinical Advisor at The Independent Pharmacy, on hand to bust some of the biggest myths doing the rounds.

A Teacher’s Triumph: Why Real Stories Matter

Emily, a 37-year-old teacher from Manchester, illustrates how weight loss drugs can be powerful allies…but they aren’t magic bullets.

After trialling Wegovy for three months—alongside swapping her late-night crisps for a colourful vegetable stir-fry—she lost 10 kg, found her energy soaring and finally fit into jeans she hadn’t worn since university.

Her journey shows that, while these injections can kick-start progress, the hard work in the kitchen (and the gym) still pays off.

Myth 1: You Can Eat Anything You Like

“This statement is simply untrue…”

Dr Grant throws down the gauntlet on the idea that these injections grant a free pass to junk food:

“This statement is simply untrue. While weight loss jabs such as Wegovy help reduce appetite and regulate blood sugar levels, it’s still essential to maintain a well-balanced diet.

The effectiveness of the weight loss medication largely depends on the individual’s ability to control food intake.

“While appetite is reduced, high-calorie intake can slow or completely stall weight loss, leading to a lack of impact from medication.

Instead, when eating, it’s vital to maintain a balanced diet offering important nutrients, rather than using the medication to eat junk food.

Key takeaway: Treat these treatments as a kick-start, not a carte blanche for midnight doughnuts.

Myth 2: You Don’t Need to Exercise

“Weight loss medication targets the appetite…”

Some imagine simply sitting back and watching the kilos melt away. Dr Grant begs to differ:

“Weight loss medication targets the appetite and has no effect on calories; therefore, by combining the medication with regular exercise, individuals can enhance results and experience quicker weight loss.

“Additionally, rapid weight loss may result in muscle loss, impacting the body’s metabolism. Regular exercise can prevent the slowing of metabolic rates while helping rebuild any muscle loss.

Maintaining a healthy lifestyle is crucial while on weight loss injections such as Wegovy, Ozempic or Mounjaro.

Tip: Aim for a mix of cardio and strength training to protect muscle, stoke your metabolism and accentuate the benefits of these therapies.

Myth 3: Results Happen Overnight

“One common misconception…dramatic weight loss occurring quickly.”

If only! The reality? A gradual unfolding:

“One common misconception surrounding weight loss jabs is that the treatment shows instant results, with dramatic weight loss occurring quickly.

This is simply untrue – and it would be unhealthy for it to be so – the treatment is designed to gradually target weight through the suppression of appetite, meaning it can take weeks for visible differences.

“Mounjaro can take up to 4 weeks for initial weight loss to occur, while Wegovy also takes a few weeks before taking effect. Through the combination of exercise and other healthy habits, people can increase the speed of weight loss.

Patience pays off: Plan for slow, steady progress and you’ll avoid the burnout and plateaus that plague many quick-fix approaches.

Myth 4: They’re Addictive

“It’s assuring to know that weight loss medication does not create a physical or psychological dependence…”

Rest easy—these aren’t contraband:

“It’s assuring to know that weight loss medication does not create a physical or psychological dependence and are not categorised as addictive substances.

There is no evidence that people who have stopped treatment have gone on to experience cravings or withdrawal symptoms.

“It is, however, important to access weight loss medication correctly, via a prescription or following an online assessment. This can ensure the treatment is only administered to those who require it, avoiding potential health risks.

Remember: Always go through a qualified prescriber to ensure you’re on the right plan for your body.

Myth 5: They Wreck Your Mental Health

“Interestingly, a recent US study of 3,500 participants…”

Fears that injections like Ozempic and Wegovy spark depression or worse? Dr Grant references solid data:

“Interestingly, a recent US study of 3,500 participants has revealed that Semaglutide – the active ingredient used in weight loss jabs such as Wegovy and Ozempic- does not increase the risk of depression or suicidal thoughts. It’s reassuring to learn that the treatment has no direct effect on mental health.

“Instead, common side effects of weight loss medication include headaches, nausea, fatigue and constipation. When considering Wegovy or similar jabs, a GP can offer more tailored advice on the potential side effects and monitor usage.

Bottom line: Keep an open dialogue with your doctor about any unexpected mood changes, but relief that mental health risks appear minimal.

Myth 6: Doubling the Dose Doubles the Impact

“Taking more than the recommended dosage has no positive effects…”

Chasing faster wins by upping your injections? Think again:

“Taking more than the recommended dosage has no positive effects on increasing the speed of weight loss. Instead, it can lead to an increased likelihood of side effects.

That’s why I strongly recommend sticking to the recommended dose, your appetite will continue to be suppressed while on the treatment, leading to the desired results.

“To avoid health risks, stick to the recommended amount while balancing treatment with a healthy diet and regular exercise. Medical professionals can monitor dosage and provide regular advice on the use of these medications.

Pro tip: Follow your prescriber’s guidance to maximise benefits and minimise risks.

Weight loss drugs like Ozempic, Wegovy and Mounjaro aren’t magic potions—but they are powerful tools when handled wisely.

By pairing the right medication with balanced meals, regular movement and professional support, many find the journey both manageable and rewarding.

If you’re curious about these treatments or keen to rule out further myths, speak to your GP or visit a reputable pharmacy for personalised advice on weight loss drugs. Always seek professional guidance before starting any new regimen.