What is the Best Injection for Weight Loss?

10 November, 2025  |  Holy Winter - Healthcare Writer

What is the Best Injection for Weight Loss?

Weight loss injections have become one of the most effective and popular medical solutions for people struggling to lose weight through diet and exercise alone. But with so many options available, many ask - what is the best injection for weight loss in the UK?

At iQ Doctor, we offer clinically proven treatments like Wegovy, Mounjaro, and Ozempic - all of which are prescription medications designed to support safe and sustained weight loss.

How Do Weight Loss Injections Work?

Weight loss injections typically use GLP-1 receptor agonists, such as semaglutide (found in Wegovy and Ozempic) or tirzepatide (found in Mounjaro). These medications mimic a natural hormone that helps regulate appetite and blood sugar levels.

By sending “fullness” signals to your brain and slowing digestion, they help reduce cravings and prevent overeating - making it easier to maintain a calorie deficit and lose weight effectively.

The Top Weight Loss Injections in the UK

1. Wegovy (Semaglutide)

Wegovy is currently one of the most recommended and effective weight loss injections in the UK. It’s a once-weekly injection that works by reducing appetite and promoting long-term weight control. Clinical trials have shown that Wegovy users can lose up to 15% of their body weight over time with proper diet and exercise.

Pros:

• Proven long-term weight loss results
• Once-weekly dosing
• Helps improve blood sugar and reduce cardiovascular risk

• Possible side effects like nausea or fatigue
• Requires consistent use and lifestyle changes

2. Mounjaro (Tirzepatide)

Mounjaro is a newer weight loss injection that targets two hormone receptors - GLP-1 and GIP - making it even more effective for some users. Early studies suggest it may lead to greater weight loss than Wegovy for certain individuals.

Pros:

• Dual-action formula for enhanced results
• Can improve insulin sensitivity and energy levels

• May cause digestive side effects initially
• Not yet suitable for all users (subject to prescription approval)

3. Ozempic (Semaglutide)

Ozempic contains the same active ingredient as Wegovy (semaglutide) but is licensed for type 2 diabetes. However, it is often prescribed off-label for weight management under medical supervision.

Pros:

• Proven effectiveness for appetite control
• Helps manage blood sugar levels

• Off-label use for weight loss in the UK
• Not specifically designed for non-diabetic patients

Which Weight Loss Injection is Right for You?

The best injection for weight loss depends on your body type, medical history, and overall health goals.

If you want steady, clinically backed results, both Wegovy and Mounjaro offer excellent options under professional guidance.

At iQ Doctor, our medical team provides online consultations and prescriptions, ensuring you get a safe and personalised treatment plan - without the hassle of visiting a clinic in person.

Weight Loss Injections: Possible Side Effects

Like any medication, weight loss injections can cause side effects - though most are temporary and mild.

Common side effects include:

• Nausea or vomiting
• Bloating or constipation
• Fatigue
• Dizziness

If you experience persistent or severe side effects, it’s important to consult a healthcare professional.

Why Choose iQ Doctor?

At iQ Doctor, we make it simple to order weight loss injections in the UK safely and discreetly.

Our UK-registered clinicians review every order, ensuring that your chosen treatment is both suitable and effective for your health goals.

We also provide ongoing medical support, helping you achieve sustainable, healthy results.

iQ Doctor is a registered UK pharmacy that specialises in medical remedies for weight loss, 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.

Also, be sure to keep in touch with iQ Doctor via our social media channels as well as keeping up to date with us by signing up to the mailing list.