Take the first steps to feeling healthier overall
Start consultationBuy once-weekly Mounjaro injection pens that target two hormones (GLP-1 and GIP) for enhanced weight loss results.
Select dose
Indicative starting dose for reference. Your clinician will determine the appropriate dose based on your medical assessment. Treatment may not be suitable for everyone.
*SURMOUNT-1, 72-week study of adults with obesity using Mounjaro (tirzepatide 15mg). Individual results vary.
Mounjaro (tirzepatide) is a once-weekly injection that helps regulate blood sugar and reduce appetite. It mimics two natural hormones GLP-1 and GIP to slow digestion, improve insulin release, and make you feel fuller for longer.
A quick overview of key details.
| Summary | |
|---|---|
| Price | From £169 / Month |
| How it works | Suppresses appetite |
| Effectiveness | 16-22.5% loss depending on the dose |
| Eligibility | BMI over 30, or over 27 with a weight-related condition |
| Side effects | Common side effects include fatigue, dizziness, nausea |
| Dosage | Starting at 2.5mg once weekly. Maximum dosage of 15mg once weekly. |
Mounjaro is a highly effective, UK licensed weight loss treatment. It has been shown in clinical trials to help achieve up to 22.5% body weight loss. It is the latest GLP-1 weight loss medication, and is used for people with a body mass index (BMI) over 30. It can also be prescribed for patients with a BMI of 27+ and a weight-related medical condition, such as high blood pressure or high cholesterol. The active ingredient tirzepatide is a registered trademark of Eli Lilly. It is known as Zepbound in the US, but launched in the UK under the brand name Mounjaro. It is used once weekly, as a subcutaneous (under the skin) injection.
People come to us for different reasons, but most are looking for a safe, supported way to manage their weight.
of body weight lost (in studies) *
reported health improvements
reported increased confidence
* Based on clinical study results and patient-reported outcomes. Individual results vary.
Read our GLP-1 weight loss survey and key insightsGB · 8 reviews
I like the way you had me wait until I uploaded a current picture when joining your company, and then wait until I was assessed by a doctor and had a decision. It proves you are a very reputable company and do not allow people to abuse the drug. It came packaged in an internally padded box with a cool pack, which I also appreciated. The service was spot on and my order went through nice and smooth.
GB · 38 reviews
The experience has been life changing for me. I have lost about 5 stone and still have another 2 stone to go, but I seem to be at a plateau. I am not hungry, so I am not overeating, and I am aware of eating to keep my body active, but there has been no weight change. I want to get to my ideal weight and then need advice on how to maintain that weight. I take vitamins to help with hair, skin and nails, and others have complimented me on how I look. It is not vanity, I just do not want to look worn out or haggard with weight loss.
GB · 33 reviews
Simple Online Pharmacy has seen me through my weight loss journey. With their help and guidance, I have lost 5.5 stone and am now working towards a suitable maintenance level of Mounjaro. The service is quick, but there is always knowledgeable support in the background. I do not feel like a number, and my concerns are always answered in a professional way.
GB · 23 reviews
Simple Online Pharmacy are a wonderful company with great ethics. While on my weight loss journey, other pharmacies have tried to constantly push products onto me and push me to buy higher and higher doses. Simple Online Pharmacy do not send anything to entice me to buy products. Instead, they send links offering support and information to help me support myself. I love the podcasts available on their YouTube channel and the calibre of the people they interview. Their prices are reasonable and easy to find without having to submit a ton of information first, and their shipping is exemplary. They are always my first port of call and always will be.
GB · 5 reviews
Filled out a reasonably in-depth questionnaire, uploaded images and then prescription was dispatched for next day delivery within the hour. Very detailed how to use guide, couldn't be simpler.
GB · 1 review
This company is easy and reliable to deal with. They have your best interests in mind and are vigilant about checking in with you about your health which indicates that they actually care.
GB · 40 reviews
I have been using SOL pharmacy for sometime now and I can honestly say the support is available 24/7 for any questions that may arise. The use of the online doctor was easy to access and provided clear direction swiftly.
Treatment begins with a low starting dose, which may be gradually increased every four weeks based on your progress.
| Dose | Stage | Price per pen |
|---|---|---|
| 2.5mg | Starter dose | £169.00 |
| 5mg | Titration | £199.99 |
| 7.5mg | Titration | £259.99 |
| 10mg | Titration | £279.99 |
| 12.5mg | Titration | £299.99 |
| 15mg | Maintenance | £319.99 |
Prices are per pen. No subscription required. Your clinician will confirm the appropriate dose based on your assessment.
Who Mounjaro may be suitable for, and the core criteria a clinician will review.
Mounjaro should only be used to support weight loss if lifestyle changes like regular exercise and diet haven't been successful. Other GLP-1 medications are also available in the UK, including Saxenda, Wegovy and Ozempic. Mounjaro can be used for patients who have a BMI of over 30, or in patients with a BMI over 27, and other risk factors such as: Diabetes type 2 High cholesterol Obstructive sleep apnoea High blood pressure
Access & cost
Mounjaro may be available on the NHS in limited circumstances, typically through specialist weight management services.
Private pricing varies by provider and dose. Our prices start from £169 per month.
Yes. Mounjaro is a prescription-only medicine and is not available over the counter.
Mounjaro is available through regulated private clinics, online pharmacies, and some NHS weight management programmes.
What the weight loss results associated with Mounjaro can look like. Individual results vary.
When using Mounjaro KwikPens to suppress appetite, you can expect to lose around 16-22.5% of your initial body weight after completing treatment. This is the most effective of all the released GLP-1 medications so far. These figures have been achieved by patients who have maintained on the highest strength of Mounjaro, which is the 15mg strength.
How Mounjaro works in the body to support appetite regulation and weight management.
Mounjaro weight loss pens mimic the action of GLP-1, a natural hormone produced in the gut. This innovative treatment promotes significant weight loss for patients by acting similarly to GLP-1. Its two main effects are: It helps regulate appetite, making it easier to eat less It makes you feel fuller for longer Both actions lead to eating fewer calories, which results in weight loss.
How Mounjaro is taken, how dosing progresses, and what to expect during titration.
The dosage table below outlines the recommended titration for Mounjaro when used for weight loss.
| Weeks | Dose | Notes |
|---|---|---|
| 1-4 | 2.5 mg once weekly | Initial dose for titration |
| 5-8 | 5 mg once weekly | Assess tolerance before increase |
| 9-12 | 7.5 mg once weekly | Assess tolerance before increase |
| 13-16 | 10 mg once weekly | Monitor for efficacy and tolerability |
| 17-20 | 12.5 mg once weekly | Further increase based on clinical response |
| 21 onwards | 15 mg once weekly | Maintenance dose if well tolerated |
Mounjaro is typically injected once a week, on the same day each week, at any time of day, with or without food.
Mounjaro is injected under the skin in the stomach, thigh, or upper arm. Rotate your injection site each week. Your clinician or pharmacist can demonstrate the correct technique if needed.
General guidance is to take a missed dose as soon as possible within 4 days. If more than 4 days have passed, skip the missed dose and take your next dose as scheduled.
If side effects feel unmanageable after a dose increase, speak to your clinician. It may be appropriate to stay at your current dose for longer before increasing, or to temporarily reduce your dose.
Yes. Our clinical team reviews your progress throughout treatment. If you have concerns at any point, you can contact us and a clinician will follow up with you.
If you stop taking Mounjaro, your appetite and weight may gradually return to pre-treatment levels. Some people continue on long-term treatment based on ongoing clinical review.
Our clinician-led process for accessing Mounjaro safely and discreetly.
Answer questions about your health, lifestyle, and goals.
A UK-registered prescriber carefully reviews your assessment to ensure treatment is safe and suitable for you.
Your medication is dispensed by our registered pharmacy and delivered directly to your door in plain packaging.
Schedule reviews with our specialist teams to monitor your progress and provide support throughout your journey.
For many people, Mounjaro can feel genuinely life-changing. It helps reduce hunger, making weight loss feel more manageable and allowing people to regain control over eating habits and focus on long-term health, not just the number on the scales.
Chief Clinical Officer
Our committed clinical team, consisting of expert doctors, pharmacists, dietitians, and health coaches, is dedicated to supporting you at every stage of your health journey. Join over 1,000,000 UK patients who trust Simple Online Pharmacy with their health.
The most common early side effects. For most people it improves within the first few weeks as the body adjusts.
"Will I feel sick all the time?"
Reality: The most common early side effect, particularly when starting or increasing your dose. For most people it settles within a few days to a couple of weeks as the body adjusts.
"What if my body reacts badly?"
Reality: Both are very common early on. Weight loss injections slow digestion, which can disrupt normal bowel patterns. They're usually manageable and improve as your body settles.
"Will I feel uncomfortable all the time?"
Reality: Bloating, gas and burping can occur as your digestive system adjusts to the medication. They're more common early in treatment and tend to ease over time.
"Why do I feel so drained?"
Reality: Fatigue is a common side effect of weight loss injections. It's not fully understood, but is likely linked to lower calorie intake, blood sugar changes, or disrupted sleep. It usually improves as your body adapts.
Common side effects, key safety considerations, and when to seek clinical support.
The most common side effects with Mounjaro affect the digestive system. These can include things like nausea, vomiting, diarrhoea and constipation. Most patients should see these effects subside after a few days. Other common side effects include: Feeling weak or tired Dizziness Injection site reactions such as bruising, pain or a rash
Common side effects include nausea, diarrhoea, constipation, and stomach pain. These often improve as your body adjusts to treatment.
Some people find smaller meals, avoiding very fatty foods, and staying well hydrated can help. If nausea is severe or persistent, speak to your clinician.
Serious risks can include pancreatitis and gallbladder issues, and there is a rare risk of thyroid tumours. Mounjaro may not be suitable if you have a personal or family history of medullary thyroid cancer.
Mounjaro does not typically cause low blood sugar on its own, but the risk can increase if taken with insulin or certain diabetes medicines.
No. Mounjaro should not be used during pregnancy. Treatment should be stopped before attempting to conceive. Speak to your clinician about timing and planning.
No. Mounjaro is not recommended while breastfeeding. Speak to your clinician before starting or continuing treatment if you are breastfeeding or planning to.
Yes. Because Mounjaro must be stopped before trying to conceive, effective contraception is recommended during treatment. Speak to your clinician if you are planning a pregnancy.
Mounjaro may slow gastric emptying, which could theoretically affect the absorption of oral contraceptives. Use additional contraception for the first 4 weeks of starting Mounjaro and for 4 weeks after each dose increase.
Your body needs time to adjust to each dose. This schedule shows when to order your next pen and what to expect.
This table shows the Mounjaro titration schedule across 24 weeks, organized by dosage levels from 2.5mg to 15mg. Each dosage level spans 4 weeks, with instructions for ordering and completing each pen.
Expected weight loss figures are estimates based on clinical data. Individual results vary based on diet, exercise, and adherence.
Common questions about Mounjaro, including comparisons, storage, access, and practical next steps.
Mounjaro is licensed for type 2 diabetes in some regions and may also be used for weight management depending on local approvals and clinical assessment.
Mounjaro activates two hormone pathways (GLP-1 and GIP), while Ozempic and Wegovy primarily target GLP-1. This difference may affect how people respond.
There is no single "strongest" option for everyone. Different medicines work differently for different people.
Storage & travel
Keep Mounjaro in the fridge (2-8°C) until use. It can be stored at room temperature (below 30°C) for up to 30 days.
Yes. Keep it stored properly using an insulated travel bag with cool packs, and carry it in your hand luggage.
Superintendent Pharmacist GPhC: 2216332
This page has been reviewed by our clinical team to ensure it is clear, accurate, and up to date.
Last updated: 3 May 2026
