Weight Loss Injections in Preston: Your Complete Guide to Mounjaro, Wegovy & GLP-1 Treatment

Losing weight can be genuinely difficult — but you don’t have to face it alone. If you’re exploring weight-loss injections in Preston, or looking for a trustworthy weight-loss clinic near you, GP-managed treatments such as Mounjaro® and Wegovy® may support safe, gradual and sustainable weight loss when combined with healthy lifestyle changes.

In line with NICE guidance, GLP-1 weight-loss injections are usually prescribed after a thorough medical assessment and can be helpful for long-term weight management. At My Private Clinic, our experienced GP provides an evidence-based, individualised assessment to help identify the most suitable option for your needs.

Ready to begin? Book a private GP consultation and take the first step towards your weight-loss goals. This article is for general information and is not a substitute for personalised medical advice.

What Are Weight-Loss Injections?

Weight-loss injections are prescription-only medicines used to help people lose weight by reducing appetite, increasing the feeling of fullness after meals, and supporting healthier eating patterns. They are intended for people who meet clear clinical criteria and are prescribed only after a thorough medical evaluation.

The leading options belong to a group of medicines known as GLP-1 receptor agonists (and related metabolic therapies). These work by mimicking hormones your body produces naturally to help regulate hunger and food intake.

The most commonly prescribed medicines include:

• Wegovy® (semaglutide)
• Mounjaro® (tirzepatide)

How Do Weight-Loss Injections Work?

Weight-loss injections work with your body’s own appetite signals — the natural hormones that control hunger and cravings — helping you feel fuller for longer. In practice, they help by:

• Reducing appetite
• Increasing satiety (the feeling of fullness)
• Slowing down digestion
• Making it easier to maintain a calorie deficit
• Supporting more mindful eating habits
• Encouraging steady, sustainable progress over time

Both Wegovy® (semaglutide) and Mounjaro® (tirzepatide) are licensed by the MHRA for weight management. They are suitable only for patients who meet specific clinical criteria, and they work best alongside a balanced, calorie-controlled diet, regular physical activity and healthier eating habits — not as a replacement for these foundations.

At My Private Clinic, our GP-led medical weight management combines medicine with personalised lifestyle support and ongoing monitoring to help keep your weight-loss journey safe.

Mounjaro vs Wegovy — What’s the Difference?

Mounjaro® (tirzepatide) and Wegovy® (semaglutide) are both effective weight-loss medicines, but they work in slightly different ways because they act on different receptors. Here are the key differences:

Feature	Mounjaro® (tirzepatide)	Wegovy® (semaglutide)
Active ingredient	Tirzepatide	Semaglutide
How it works	Dual GIP and GLP-1 receptor agonist	GLP-1 receptor agonist
Dose	Once-weekly injection	Once-weekly injection
Average weight loss in trials*	Around 15–20% at higher doses	Around 10–15%
Originally developed for	Type 2 diabetes	Type 2 diabetes
MHRA licensed for weight loss	Yes	Yes
Common side effects	Nausea, constipation, diarrhoea, acid reflux	Nausea, constipation, diarrhoea, acid reflux

*Trial averages when combined with diet and lifestyle changes. Individual results vary.

Which Option Is Right for You?

Both injections can be effective for weight management, but the most suitable choice depends on your:

• Body Mass Index (BMI)
• Previous medical history
• Current medicines, if any
• Weight-loss goals

During your GP consultation, your doctor will discuss the most appropriate option for your individual health needs.

Is Ozempic the Same as Wegovy?

No. Ozempic® and Wegovy® both contain the same active ingredient — semaglutide — but they are licensed for different purposes.

Key differences include:

• Active ingredient: both contain semaglutide.
• Primary use: Ozempic is licensed for type 2 diabetes; Wegovy is licensed for weight loss.
• Dosage: Wegovy is prescribed at higher doses for weight management.
• Weight loss: Wegovy is the licensed option for eligible patients seeking medical weight loss.

At My Private Clinic, our GP provides MHRA-licensed options, including Wegovy and Mounjaro, following a detailed clinical assessment.

Who Is Eligible for Weight-Loss Injections?

It’s a common myth that weight-loss injections are a quick, convenient way to change the number on the scales. In reality, they are not suitable for everyone, and a comprehensive medical assessment comes first to confirm whether treatment is appropriate for you.

In line with NICE guidance on obesity management, you may be a suitable candidate if you:

• Have a BMI of 30 kg/m² or above (obesity), or
• Have a BMI of 27 kg/m² or above with a weight-related health condition, such as:
  • Type 2 diabetes
  • High blood pressure
  • High cholesterol
  • Obstructive sleep apnoea
• Have been unable to achieve sustainable weight loss through diet and exercise alone, and
• Are willing to combine medicine with healthy lifestyle changes and regular follow-up.

How Much Weight Can You Lose With Weight-Loss Injections?

Results vary from person to person, but clinical trials have shown meaningful weight loss when injections are combined with lifestyle changes and healthier eating.

In clinical trials:

• Mounjaro® (tirzepatide): average weight loss of around 15–20% at higher doses, depending on the dose and duration of treatment.
• Wegovy® (semaglutide): average weight loss of around 10–15%.

Your own results will depend on:

• Your starting weight and BMI
• The medicine prescribed
• Following the recommended dosing schedule
• Maintaining healthy eating habits and regular exercise

Weight loss isn’t an overnight event — it’s a gradual process, with the best outcomes seen over months. At My Private Clinic, our GP monitors your progress, arranges private blood tests or specialist referrals where medically appropriate, and supports you to lose weight steadily and safely.

Are Weight-Loss Injections Safe? Side Effects to Know

Under a qualified GP’s supervision, weight-loss injections are generally safe for patients who meet the clinical criteria. As with all medicines, they can cause side effects. These are usually mild and often settle over time as your body adjusts.

Common side effects include:

• Nausea
• Vomiting
• Diarrhoea
• Constipation
• Heartburn or acid reflux
• Indigestion and other stomach upset

Less common but more serious side effects include:

• Gallbladder or biliary tract problems
• Pancreatitis (inflammation of the pancreas)
• Allergic reactions in some people

To help reduce side effects, your GP may advise you to:

• Start with a low dose and increase gradually
• Practise portion control
• Choose healthier fats and avoid very high-fat foods
• Stay well hydrated
• Follow the dosing instructions carefully and check before changing anything

What Happens When You Stop Weight-Loss Injections?

There are usually no withdrawal symptoms after stopping weight-loss injections. However, without ongoing healthy habits, some people regain weight as their appetite gradually returns.

To help maintain your results:

• Keep eating nutrient-rich food within your maintenance calories
• Stay hydrated and keep active to help maintain your weight
• Book regular follow-up appointments to support long-term maintenance
• Always speak to your GP before stopping treatment

Private Weight-Loss Clinic in Preston — What to Expect

At My Private Clinic, your journey starts with an individualised consultation with our GP. We take the time to understand your health goals and to discuss whether weight-loss injections are suitable for you.

During your consultation, your GP will:

• Review your current health and medical history
• Check your BMI and arrange any diagnostic tests needed
• Talk through your weight-loss goals and previous efforts
• Assess whether Mounjaro®, Wegovy® or another option is appropriate for you
• Explain the potential benefits, common side effects and realistic expectations
• Create a personalised treatment plan and follow-up schedule

If weight-loss injections are suitable for you, your GP will:

• Guide you through the process and next steps
• Advise on the lifestyle changes that will help
• Show you how to use the medicine correctly
• Monitor your progress and any side effects to help keep your weight loss safe and steady

How Much Do Weight-Loss Injections Cost in the UK?

The cost of weight-loss injections depends on the medicine prescribed, your dose, and any follow-up appointments. Your treatment costs may include:

• An initial private GP consultation
• Private prescriptions
• Follow-up appointments for review
• Ongoing support and monitoring

At My Private Clinic, we’ll discuss the available options and give you a clear breakdown of costs, so you know what to expect before starting treatment. If you’re not sure which option is right for you, our medical weight management page explains the choices, and you can also see our pricing page.

Other Weight-Loss Options at My Private Clinic

Weight-loss injections aren’t right for everyone. After assessment, your GP may recommend other approaches based on your needs and safety. Other options available at My Private Clinic include:

• Medical weight management: a GP-led programme with ongoing support.
• Health MOTs: a preventive assessment to identify any undiagnosed conditions and review your overall health.
• Private blood tests: to check for hidden metabolic factors that can affect weight, including visceral fat.
• Thyroid function tests: to check whether an underactive or overactive thyroid may be affecting your weight.
• Diabetes screening: where clinically appropriate.
• Blood pressure monitoring and ECG: if your GP considers a heart-health assessment appropriate.
• Well man and well woman checks: for a comprehensive review of your general health and risk factors.
• Women’s hormone blood tests: to help assess conditions such as PCOS, where hormonal imbalance can contribute to weight gain.

Frequently Asked Questions

Can I get weight-loss injections on the NHS?

Weight-loss injections are available on the NHS for some patients who meet specific eligibility criteria. Access depends on local NHS services and current clinical guidance, and waiting times can vary.

Do I need a prescription for weight-loss injections?

Yes. Medicines such as Mounjaro® and Wegovy® are prescription-only and should only be prescribed following a medical assessment by a qualified GP or other authorised prescriber.

Can I exercise while taking weight-loss injections?

Yes. Regular physical activity is recommended alongside treatment to support healthy, sustainable weight loss and improve overall wellbeing.

Can I drink alcohol while taking weight-loss injections?

Alcohol is not prohibited, but it may increase side effects such as nausea or stomach discomfort. If you choose to drink, moderation is recommended, and you can discuss this with your GP.

Can weight-loss injections be used long term?

Some patients benefit from longer-term treatment, while others may stop once they have reached their goals. Your GP will review your progress and advise on the most appropriate plan for you.

Can I switch from Wegovy® to Mounjaro®?

In some cases, yes. However, any change in medicine should only be made under the guidance of your GP and following a clinical review.

What happens if I miss a dose?

If you miss a dose, follow the patient information leaflet supplied with your medicine, or speak to your GP or pharmacist for advice. Do not take an extra dose unless advised by a healthcare professional.

Are weight-loss injections suitable for people with diabetes?

Some of these medicines were originally developed to treat type 2 diabetes. Your GP will assess your medical history and recommend the most appropriate treatment for your individual needs.

Can I take weight-loss injections with other medications?

Some medicines may interact with weight-loss injections. Always tell your GP about any prescription medicines, over-the-counter products or supplements you are taking before starting treatment.

Can I become pregnant while taking weight-loss injections?

Weight-loss injections are not recommended during pregnancy. If you are pregnant, breastfeeding or planning a pregnancy, discuss alternative options with your GP.

What should I eat while taking weight-loss injections?

A balanced diet rich in lean protein, vegetables, whole grains and plenty of fluids can help maximise results and reduce digestive side effects. Your GP may also provide personalised dietary advice.

Do I need blood tests before starting treatment?

Some patients benefit from blood tests to assess overall health or identify conditions such as diabetes or a thyroid disorder before starting treatment. Your GP will advise whether these are needed.

How often will I need follow-up appointments?

Follow-up appointments help monitor your progress, review any side effects and adjust your plan if needed. The frequency depends on your individual treatment and how you respond.