Medical Weight Loss Injections Online 
GP-LED | MOUNJARO | WEGOVY | ACROSS ENGLAND 

All prices are per pen containing 4 weekly doses and are all-inclusive. Consultations, coaching and delivery included at no extra charge. Mounjaro (Tirzepatide) Price Wegovy (Semaglutide) Price We focus on "dose optimisation" — keeping you on the most effective dose for your results, which often avoids the higher costs associated with the maximum dose pens.

Clinical trials (SURMOUNT vs STEP) suggest Mounjaro (tirzepatide) produces greater average weight loss, up to 22.5% of body weight, compared to Wegovy at approximately 15%. Mounjaro works on two hormonal pathways (GIP and GLP-1), while Wegovy works on one (GLP-1 only), which is thought to explain the difference in outcomes. However, the best medication depends on your individual health profile, medical history, and how your body responds. Our clinicians at Calleva Clinic will recommend the most appropriate option during your free consultation.

Mounjaro Average weight loss 21% by week 72 SURMOUNT-4 trial: 25.3% over 88 weeks Waist Reduction 7.6" avg. at 10mg By week 72 on 10mg maintenance dose Wegovy Average weight loss 14.9% by week 68 STEP 1 trial: 1 in 3 patients ≥20% loss over 2 years Waist Reduction 5.7" by week 68 Average reduction on the 2.4mg maintenance dose Results vary depending on starting weight, dose, diet, and lifestyle. Most patients begin to notice changes within the first 4–8 weeks. Significant, sustained weight loss typically occurs over 6–12 months with consistent use. Calleva Clinic provides monthly clinical oversight and coaching to help you achieve the best possible outcome.

Yes, in many cases you can. Type 2 diabetes is a weight-related condition that may allow for eligibility at a lower BMI threshold of 27 or above. Treatments like Mounjaro and Wegovy are effective at improving insulin sensitivity and blood glucose control while supporting weight loss. Please note: If you are currently prescribed specific diabetic medications, we may be unable to offer treatment, as your care is safest when managed by your dedicated diabetic team. Send us a message and we will review.

Tirzepatide is the active ingredient in Mounjaro. It mimics two gut hormones — GIP and GLP-1 — to regulate appetite, slow gastric emptying, and improve insulin sensitivity. This dual action reduces hunger, lowers calorie intake, and significantly reduces "food noise." It is injected once weekly via a pre-filled pen and is approved in the UK for weight management in adults with obesity or weight-related health conditions.

Mounjaro (tirzepatide) and Ozempic (semaglutide) are both weekly injectable medications, but they work differently and are licensed for different purposes. Ozempic is a GLP-1 receptor agonist licensed primarily for Type 2 diabetes in the UK — it is not licensed for weight loss, though it is sometimes prescribed off-label. Wegovy is the weight loss-licensed version of semaglutide. Mounjaro acts on both GLP-1 and GIP receptors, and clinical evidence consistently shows it produces greater weight loss than semaglutide. Calleva Clinic prescribes Mounjaro and Wegovy — both licensed for weight management in the UK.

Calleva Clinic is a GP practice-led service, not an online pharmacy. You are assessed by qualified clinicians, not just asked to fill a basket. Prescriptions are issued after a thorough clinical review, never automatically. You receive ongoing support including dosage guidance, side effect monitoring, and follow-up care tailored to your medical history and long-term goals. We are a trading name of Tadley Medical Partnership, rated Good by the CQC — providing end-to-end medical care from consultation to prescription, supply, and supervision.

Yes — provided it is prescribed by a regulated clinical service following a proper medical assessment. Calleva Clinic is a trading name of Tadley Medical Partnership, rated Good by the Care Quality Commission (CQC). Our prescriptions are issued by qualified clinicians after a thorough clinical review of your health history, BMI, and suitability. We do not issue automatic prescriptions. The risks arise when Mounjaro is purchased from unregulated sources or online pharmacies that dispense without adequate clinical oversight. With Calleva Clinic, you receive end-to-end GP-led care throughout your treatment.

No referral is needed. You can book directly with Calleva Clinic without seeing your NHS GP first. Our service is entirely self-referral — simply book a free video consultation online and our clinical team will assess your eligibility. This means faster access to treatment without waiting for an NHS appointment or referral letter.

These treatments may be suitable for adults aged 18 to 85 who meet the following criteria: BMI ≥ 30 (Obesity), or BMI ≥ 27 (Overweight) with a weight-related health problem such as: pre-diabetes, high blood pressure, abnormal levels of fats in the blood, obstructive sleep apnoea, or a history of heart attack, stroke or blood vessel problems.

In 2026, NHS access via GPs is strictly prioritised. Currently, "Cohort 1" requires a BMI of 40 or above and at least four qualifying conditions such as hypertension, heart disease, Type 2 diabetes, or sleep apnoea. "Cohort 2," starting mid-2026, will expand eligibility to BMI 35 or above. The majority of patients who would benefit from these treatments do not currently meet NHS thresholds. Private care at Calleva Clinic offers the same GP-led standard of care with no waiting list.

Clinical evidence shows that most patients regain a significant portion of lost weight after stopping weight loss injections, as the appetite-suppressing effects wear off. This is a known limitation of GLP-1 and dual-agonist therapies and is not unique to Mounjaro or Wegovy. This is why ongoing clinical support and sustainable lifestyle changes are essential throughout treatment. At Calleva Clinic, our clinicians work with you to build lasting habits during your treatment so you are best placed to maintain your results long term. Stopping should always be discussed with your prescribing clinician rather than done abruptly.

The most common side effects of Mounjaro and Wegovy include nausea, diarrhoea, constipation, reduced appetite, and mild injection site reactions. These are typically most noticeable in the first few weeks as your body adjusts and usually improve over time with dose titration. Serious side effects such as acute pancreatitis are rare but possible. Our clinicians discuss all potential side effects during your consultation and monitor you monthly throughout treatment. You have direct access to your clinical team if any concerns arise.

Yes. Based in Tadley, Hampshire (near Basingstoke), Calleva Clinic serves patients anywhere in England via video consultation and free temperature-controlled home delivery — from Cornwall to Northumberland. No in-person visit is required at any stage. Whether you are in London, Manchester, Birmingham, Leeds, Bristol, Newcastle, or a rural area, access to GP-led Mounjaro and Wegovy prescriptions is the same. Delivery is free and temperature-controlled to maintain medication safety.

Yes. Calleva Clinic is a fully remote GP-led service — the entire process takes place online. Your initial consultation is a video appointment with a qualified clinician who will review your health history, BMI, and suitability. If treatment is appropriate, your prescription is issued and your medication is dispatched directly to your home anywhere in England. Ongoing monthly video consultations, dose reviews, and clinical support are all included. You never need to travel to a clinic or GP surgery to access or continue treatment with Calleva Clinic.

Most patients can start within a few days of booking. The process is straightforward: book a free video consultation online, complete a brief health questionnaire beforehand, attend your video appointment, and — if suitable — your prescription is issued and medication dispatched shortly after. Delivery is free and temperature-controlled, reaching patients across England typically within 1–2 working days of dispatch. There is no waiting list and no NHS referral required.

Calleva Clinic provides free temperature-controlled delivery of Mounjaro and Wegovy to any address in England, Tuesday to Friday. Medication is dispatched in specialist cold-chain packaging to maintain efficacy and safety throughout transit. You can also collect in person from our clinic in Tadley, Hampshire if you prefer. Delivery is included in the price of your treatment — there are no additional shipping charges.

There are several reasons why the dose knob can be hard to push. ​ Visit Eli Lilly FAQ page to view troubleshooting video to help you resolve the issue with your jammed KwikPen. ​ Reasons why the KwikPen dose knob can be difficult to push includes: Faulty, jammed or blocked needle and/or needle is not compatible with the pen. Dirt, dust, food residue, or liquid inside the KwikPen. Pushing the dose knob too quickly. ​ If the dose knob is hard to push: Check your injection technique: After you prime the KwikPen and are ready to deliver your dose, push the dose knob more slowly to make it easier to inject the dose. Ensure proper pen needle use: your needle may be blocked and interrupting the flow of the medicine. Put on a new pen needle and prime the KwikPen. Confirm dose delivery and priming technique: you may have received 4 full doses or primed more than 8 times, resulting in over priming. Throw the KwikPen away and get a new KwikPen. ​ Need Further Help ? Contact the Mounjaro CAREline​ ​ Call 01256 315000 and dial ‘0’ Monday to Friday, 9am – 5pm  ​ Ensure the Mounjaro KwikPen Device is available when you make the phone call. During the call, their experts aim to quickly identify the root cause and resolve the KwikPen issue. Keep note of your reference number to help with any future communications ​ To provide fast support and assistance, the Mounjaro CAREline experts aim to identify the root cause and resolve the KwikPen issue during the phone call, avoiding the need to send the device in for further investigation. ​ Please be advised that if their investigation uncovers any evidence of user error, including but not limited to issues with injection technique, needle usage, or device storage, they will be unable to offer reimbursement or replacement of the device.

Contact Novo Nordisk Customer Care ​​​ Call 0800 023 2573  Monday to Friday, 8.30am - 5.30pm This is a freephone number. No costs will be incurred by the caller. Calls maybe monitored for training purposes. ​ Submit a Message Online ​ Ensure your Wegovy device is available when you make the phone call.​