Weight Loss Injections Reviewed: Side Effects and Safety

21 November, 2025  |  Holy Winter - Healthcare Writer

Weight Loss Injections Reviewed: Side Effects and Safety

Weight loss injections such as Wegovy, Mounjaro, and Semaglutide have become some of the most talked-about treatments for managing obesity and supporting long-term weight loss. But with their rapid rise in popularity comes an important question - are weight loss injections safe?

At iQ Doctor, we’ve reviewed how these medications work, their potential side effects, and what users in the UK are saying about them.

What Are Weight Loss Injections?

Weight loss injections are prescription medications designed to help reduce appetite and improve blood sugar control. The most well-known types available in the UK include:

• Wegovy (Semaglutide): A once-weekly injection that mimics the hormone GLP-1, helping you feel full for longer.
• Mounjaro (Tirzepatide): Works on both GLP-1 and GIP receptors, offering dual benefits for appetite control and metabolic improvement.
• Ozempic (Semaglutide): Originally designed for type 2 diabetes but now widely recognised for its weight loss effects.

These medications are available through licensed online pharmacies like iQ Doctor , where prescriptions are issued following an online consultation with a qualified prescriber.

Common Side Effects of Weight Loss Injections

Like all medicines, weight loss injections can cause side effects - though not everyone experiences them.

Mild Side Effects:

• Nausea
• Vomiting
• Diarrhoea or constipation
• Stomach discomfort or bloating
• Fatigue

These are usually temporary and occur as your body adjusts to the medication.

Moderate to Serious Side Effects (Less Common):    

• Gallbladder problems (such as gallstones)
• Pancreatitis (inflammation of the pancreas)
• Low blood sugar (especially in diabetic patients using other glucose-lowering medication)
• Allergic reactions or injection site irritation

Are Weight Loss Injections Safe?

When prescribed correctly and monitored by a healthcare professional, weight loss injections are generally considered safe. Clinical trials have shown that Wegovy and Mounjaro can lead to significant weight loss, often 10–20% of body weight over time. However, the safety of these medications depends on several factors, including your medical history, lifestyle, and current medications.

To ensure safety:

• Always follow the prescribed dose.
• Don’t combine multiple GLP-1 medications.
• Eat smaller, balanced meals to reduce nausea.
• Avoid alcohol, which can worsen side effects.

At iQ Doctor, prescriptions are issued only after a thorough medical assessment to ensure these treatments are suitable for you.

Wegovy Reviews UK: What People Are Saying

Early Wegovy reviews in the UK suggest that many users experience steady and consistent weight loss, often reporting reduced cravings and improved confidence. However, most reviews also mention mild nausea or digestive upset during the first few weeks - something that typically subsides as the body adapts. Users who combine Weight Loss Injections with a calorie-controlled diet and regular exercise tend to see the most sustainable results.

Where to Get Weight Loss Injections Safely in the UK

To ensure you’re getting genuine and clinically approved medication, always buy through a registered UK pharmacy like iQ Doctor.

Through iQ Doctor, you can:

• Complete a free online consultation.
• Get your prescription reviewed by a UK-licensed prescriber.
• Have your treatment delivered discreetly and safely.

Final Thoughts

Weight loss injections like Wegovy and Mounjaro offer real hope for those struggling with obesity or stubborn weight issues. While side effects are possible, most are manageable and temporary — especially when used under professional guidance.

iQ Doctor is a registered UK pharmacy that specialises in medical remedies for weight loss (including Wegovy and Mounjaro), erectile dysfunction, hair loss support and much more. Whether you require over-the-counter relief, or prescription-only medication, the experts at iQ Doctor can assist. Please get in touch if you need any further advice.    

Frequently Asked Questions    

1. Are weight loss injections safe for everyone?

Not always. They’re generally safe when prescribed correctly, but people with certain medical conditions (like pancreatitis or severe gastrointestinal issues) may not be suitable candidates.

2. What are the main side effects of weight loss injections?

The most common side effects are nausea, vomiting, and stomach discomfort. These are usually mild and improve with time. 

3. How long do you need to use weight loss injections?

Treatment duration varies per individual. Most users take them for several months, but long-term use may be necessary to maintain results.    

4. Can I buy Wegovy or Mounjaro online in the UK?    

Yes — you can purchase licensed versions of Wegovy and Mounjaro safely from iQ Doctor, following an online consultation with a prescriber.            

5. What happens if I stop taking weight loss injections?    

If you stop treatment, your appetite may return to normal, and some weight may be regained. It’s important to maintain healthy lifestyle habits alongside treatment.