Weight Loss Treatments

Effective solutions for weight loss

A programme to change your weight, mindset and behaviour.

Mounjaro (Tirzepatide)

Use code WEIGHT20

From £41.00 £33.49/week

Wegovy (Semaglutide)

Use code WEIGHT20

From £28.50 £24.75/week

Buy Weight Loss Injections Online

At Chemist Click, you can safely buy licensed, clinically proven weight loss injections online, including popular options like Mounjaro and Wegovy.

Our UK-registered pharmacy offers genuine medication with transparent pricing and free ongoing support from our healthcare team. After completing a quick online consultation, your treatment is reviewed by a qualified prescriber and delivered discreetly to your door.

Weight loss calculator

Mounjaro® vs Wegovy® – Quick Comparison!

Set your starting weight to compare estimated 12-month weight loss, total cost, weekly cost, and end weight for each treatment. Figures shown are based on example calculations and are for guidance only!

Units

0kg ≈ 0lb
Start your transformation!
Starting weight
90kg

≈ 0.4lb

Mounjaro® (tirzepatide)

Assumes 22.5% loss

Estimated weight loss in 12 months

0kg

Estimated weight after 12 months

0kg

Estimated cost

£0
≈ £0 per week
Wegovy® (semaglutide)

Assumes 17% loss

Estimated weight loss in 12 months

0kg

Estimated weight after 12 months

0kg

Estimated cost

0kg
≈ £0 per week

How we estimate these numbers!

Weight-loss figures are based on data from clinical trials. Cost estimates are calculated using Chemist Click pricing (including our introductory offer) and typical monthly usage patterns. Results and costs may vary depending on your dosage, treatment duration, and individual response.

Weight loss injections overview

Weight loss injections, such as Mounjaro and Wegovy, are prescription injections that help to control your appetite.

As a result, you eat less and consume fewer calories making you lose weight.

You may be eligible for weight loss injections if you:

  • Have a BMI of 30 or above
  • Have a BMI of 27 and above with a weight-related condition such as high blood pressure or type 2 diabetes

Comparing weight loss injections

Mounjaro

How it works

Mounjaro for weight loss is a once-weekly injection that activates GLP-1 and GIP receptors. This dual action helps reduce appetite, slow gastric emptying, and improve feelings of fullness, making it easier to eat less and stick to a calorie deficit.

How to use it

  • Dose schedule: start low and increase every 4 weeks as advised, up to a typical maintenance dose (often 10-15 mg weekly, if tolerated).
  • When: inject once a week, same day each week, with or without food.
  • Where: abdomen, thigh or upper arm (rotate sites).
  • Support: follow your Chemist Click plan for titration, side-effect tips and check-ins.

How effective is it?

In clinical studies of adults without diabetes, Mounjaro helped patients lose around 15-20% of body weight on average, after 72 weeks.

Wegovy

How it works

Wegovy for weight loss is a GLP-1 receptor agonist taken once weekly. It reduces appetite and slows gastric emptying, helping you feel satisfied on fewer calories and supporting sustainable weight loss.

How to use it

  • Dose schedule: start on the lowest dose and increase every 4 weeks to a maintenance dose of 2.4 mg weekly (if tolerated).
  • When: inject once a week, same day each week, with or without food.
  • Where: abdomen, thigh or upper arm (rotate sites).

How effective is it?

In clinical trials of adults without diabetes, Wegovy led to an average of 15% weight loss after 68 weeks. Some users lost up to 17% of their starting weight.

Switching weight loss injections

The price of Mounjaro has increased significantly.

Wegovy is a cheaper option. If you are currently using Mounjaro and would like to start taking Wegovy, you should complete a consultation. One of our pharmacists will safely adjust your dose to keep your weight-loss on track.

Side effects of weight loss injections

Weight loss injections like Mounjaro and Wegovy are generally well tolerated, but like all medications, they can cause some side effects.

Most common side effects:

Side-effect Approximate % of users it affects*
Nausea 30%
Diarrhoea 25%
Vomiting 15%
Constipation 15%
Abdominal / stomach pain / indigestion 10%
Decreased appetite 10%

* These are rounded average approximations across the available data for both Wegovy and Mounjaro combined.

Most side effects of weight loss injections are mild and tend to improve over time as your body adjusts. If you experience anything severe or persistent, it is important to discuss this with your prescriber so they can review your dosage.

Do weight loss injections work?

Weight loss injections are highly effective at helping users to lose weight.

Users can expect to lose up to 17-22% of their starting weight after one year of consistent use.

Combined with a healthy diet and exercise, you could lose more weight than this.

Result Wegovy (Semaglutide) Mounjaro (Tirzepatide) What it means for you
Possible weight loss Around 17% of body weight after 68 weeks Around 22% of body weight after 72 weeks If you weigh 100 kg, that’s roughly 15–20 kg lost on average
People who lost ≥ 10% of their body weight Around 70% of users Around 80% of users Most users achieve at least 10% weight loss
People who lost ≥ 15% of their body weight Around 50% of users Around 66% of users Both treatments are highly effective
Maximum weight loss seen in trials Up to 17–18% Up to 22–25% Some users achieved even greater results
Time to see results Noticeable results by week 8–12 Noticeable results by week 8–12 Weight loss builds gradually as the dose increases

Frequently asked questions

Weight loss injections work by mimicking natural hormones in your body that control appetite and blood sugar.

They help you:

  • Feel full sooner
  • Reduce cravings
  • Slow down digestion – meaning you eat less without feeling hungry all the time.

By helping to regulate appetite and calorie intake, these treatments help you lose weight.

Weight loss injections are usually only available on the NHS for people with a BMI of at least 40 and with 4 of the qualifying weight-related health problems. If you fit these criteria, you should speak to your GP about starting treatment.
For most people, these treatments are available privately, and we can help you access them safely and legally.

Both Mounjaro and Wegovy are highly effective weight loss injections, but the best option depends on your health, goals, financial status and how your body responds.

Clinical studies show that Mounjaro may lead to slightly greater weight loss – with some people losing up to around 22% of their body weight. It works by targeting two appetite-regulating receptors (GLP-1 and GIP), helping you feel fuller for longer and improving blood sugar control.

Wegovy, on the other hand, targets one receptor (GLP-1) and is a well-established, proven treatment that still delivers impressive results – with users typically losing around 17% of their body weight. It is also more affordable and widely available in the UK.

Ultimately, both injections are safe and effective when used under medical supervision. Our clinicians can help you choose the right treatment based on your health, preferences, and weight-loss goals.

You may be eligible for weight loss injections if your BMI is 30 or above, or 27 and above if you have a weight-related health condition like type 2 diabetes or high blood pressure. Chemist Click will review your medical history and current health to make sure the treatment is safe and suitable for you.

They are safe for most adults when prescribed and monitored by a healthcare professional.

Treatments have been clinically tested and approved in the UK for weight management, with well-established safety profiles.

Side effects are usually temporary and improve as your body adjusts.

Serious side effects are rare, but treatment should always be started under medical supervision, particularly if you have existing medical conditions such as diabetes, thyroid problems or heart disease.

Most people start to notice a reduction in appetite within the first few days, and results are usually visible within 4-6 weeks, as the dose is gradually increased.

The biggest results are usually seen after 3 to 6 months, once you reach your maintenance dose.

You can stay on treatment for as long as you need to, until you reach your weight loss goals.

When you stop weight loss injections, your appetite and hunger signals may gradually return to how they were before treatment. This can make it easier to regain weight if you do not continue with healthy eating and lifestyle habits.

 

Dose Wegovy Mounjaro How long it lasts
Starter dose 0.25 mg
£113.99
2.5 mg
£163.99
4 weeks
Next dose up 0.5 mg
£117.99
5 mg
£173.99
4 weeks
Mid dose 1 mg
£127.99
7.5 mg
£232.99
4 weeks
Higher dose 1.7 mg
£156.99
10 mg
£259.99
4 weeks
Highest dose 2.4 mg £195.99 12.5–15 mg
£279.99–£299.49
4 weeks
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