Weight Loss Injections in London: Ozempic, Wegovy, and Mounjaro From a Private Doctor
GLP-1 weight loss medications — semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro) — have transformed how doctors treat obesity. Clinical trials show average weight loss of 15-20% of body weight, with improvements in blood pressure, cholesterol, blood sugar, and fatty liver markers. These are not appetite suppressants from the past. They work by mimicking natural gut hormones that regulate hunger and satiety.
The Online GP by The Wellness provides doctor-led weight loss programmes with GLP-1 medications, starting with an initial medical assessment for £150. Every patient receives a proper face-to-face or video assessment, blood tests, and ongoing doctor monitoring — not a rubber-stamp online questionnaire.
Interested in medical weight loss? WhatsApp us now for a confidential conversation about your options, or email team@thewellnesslondon.com.
Why Doctor-Led Weight Loss Matters
The UK market is now flooded with online pharmacies offering GLP-1 medications after little more than a questionnaire. This is concerning for several reasons.
These are powerful medications with real side effects. Nausea, vomiting, and gastrointestinal discomfort affect the majority of patients, particularly during dose escalation. Rarer but serious risks include pancreatitis, gallbladder disease, and kidney problems. Without proper medical oversight, these complications can be missed or mismanaged.
At The Online GP by The Wellness, our approach is fundamentally different. You see a GMC-registered doctor — face-to-face or via video — who conducts a thorough medical assessment before any prescription is considered. We require baseline blood tests (full blood count, kidney function, liver function, lipid profile, thyroid function, and HbA1c) to ensure it is safe for you to take these medications. And we monitor you throughout your treatment with regular consultations and repeat blood work.
This is not a conveyor-belt prescription service. It is medical weight management.
How GLP-1 Medications Work
GLP-1 stands for glucagon-like peptide-1, a hormone your body naturally produces after eating. It tells your brain you are full, slows stomach emptying so you feel satisfied for longer, and reduces cravings — particularly for high-calorie foods.
Semaglutide (Ozempic / Wegovy) is a once-weekly injection that mimics GLP-1. In clinical trials, patients using semaglutide achieved an average body weight reduction of 14.9% compared to 2.4% with placebo. Ozempic is licensed for type 2 diabetes but widely prescribed off-label for weight loss. Wegovy is the same active ingredient at a higher dose, licensed specifically for weight management.
Tirzepatide (Mounjaro) is a newer dual-action medication that targets both GLP-1 and GIP (glucose-dependent insulinotropic polypeptide) receptors. Clinical trials suggest tirzepatide may produce greater average weight loss than semaglutide — up to 22.5% of body weight in some studies. It is currently licensed for type 2 diabetes but used off-label for weight loss.
Both medications are self-administered as a once-weekly injection using a pre-filled pen. Our doctors or nurses will show you exactly how to use it at your first appointment.
Who Is Eligible?
GLP-1 medications are medical treatments for clinical obesity, not cosmetic weight loss tools. We follow NICE guidelines and prescribe for adults with a BMI of 30 or above (obesity), or a BMI of 27 or above with at least one weight-related health condition such as type 2 diabetes, high blood pressure, high cholesterol, or obstructive sleep apnoea.
You may not be suitable if you are pregnant, planning to become pregnant, or breastfeeding. They are also contraindicated in patients with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2, severe gastrointestinal conditions including gastroparesis, or severe kidney or liver disease.
Our doctors will assess your suitability thoroughly during your initial consultation. We will never guarantee a prescription before assessment — your safety comes first.
Want to find out if you're eligible? WhatsApp us for a confidential, no-obligation conversation.
Our Weight Loss Programme
Initial Medical Assessment — £150
Your journey starts with a comprehensive medical consultation. This is not a tick-box exercise. Your doctor will review your full medical history, current medications, lifestyle, family history, and weight loss goals. We will arrange baseline blood tests including full blood count, kidney function, liver function, lipid profile, thyroid function, and HbA1c (diabetes screen).
If you proceed with treatment, the £150 assessment fee is deducted from your first month's programme fee.
Ongoing Medical Support
All our weight loss programmes include regular doctor consultations to monitor your progress, manage side effects, and adjust dosing. We start at a low dose and increase gradually — this is essential for minimising gastrointestinal side effects and ensuring your body adjusts safely.
Your programme includes medication costs, doctor consultations, blood work monitoring, and access to our WhatsApp concierge for questions between appointments. Enhanced programmes include body composition tracking, personalised nutrition guidance, and dedicated specialist support.
What to Expect
Most patients begin noticing reduced appetite and early weight loss within the first 2-4 weeks. Weight loss typically continues progressively over 12-18 months, with the greatest rate of loss during the first 6 months. Results vary significantly between individuals — some lose more, some less. Lifestyle changes including balanced nutrition and regular physical activity are essential for the best outcomes and long-term maintenance.
We are honest about what these medications can and cannot do. They are powerful tools, but they work best as part of a broader commitment to healthier living. They are not a shortcut, and weight regain after stopping medication is a real consideration that we discuss openly with every patient.
Why the NHS Often Cannot Help
The NHS has strict criteria for prescribing GLP-1 medications, and even patients who qualify face significant barriers. Most NHS areas have long waiting lists for specialist weight management clinics, and some have paused prescribing entirely due to cost and supply pressures. The medications cost the NHS approximately £200-300 per patient per month — multiply that by the millions who could benefit, and the funding gap becomes clear.
Your NHS GP saying no is not them being difficult. They are working within a system that currently cannot meet demand. A private doctor-led service provides an alternative pathway for patients who are clinically appropriate and wish to access treatment without the wait.
Side Effects — What We Tell Every Patient
We believe in complete transparency. The most common side effects are gastrointestinal and include nausea (affecting 60-70% of patients), vomiting (24-40%), diarrhoea (30-40%), constipation (30-40%), and abdominal discomfort. These typically occur during dose escalation and often improve over time, though some patients discontinue treatment because of persistent symptoms.
Other side effects include fatigue, dizziness, headache, and injection site reactions. Rare but serious risks include pancreatitis, gallbladder disease, kidney problems, and — in animal studies — thyroid tumours.
This is precisely why proper medical supervision matters. When you experience side effects, you need a doctor who knows your history and can adjust your dose, manage symptoms, or stop treatment if needed. An online pharmacy questionnaire cannot provide this.
Ready to take the first step? WhatsApp us now to book your initial assessment, or email team@thewellnesslondon.com.
Frequently Asked Questions
Can I switch between Wegovy and Mounjaro?
Yes. If one medication is not producing the results you expect, or if side effects are difficult to manage, your doctor may recommend switching. This is another advantage of doctor-led care — your treatment can be adapted to your individual response.
Will I regain weight when I stop the medication?
Studies show that many patients regain some weight after stopping GLP-1 medications. This is why we emphasise lifestyle changes alongside medication — building sustainable habits around nutrition and physical activity gives you the best chance of maintaining your results long-term. We discuss exit strategies and maintenance planning with every patient.
Can I use these medications if I have type 2 diabetes?
Yes — in fact, semaglutide (Ozempic) was originally developed for type 2 diabetes management. GLP-1 medications improve blood sugar control as well as supporting weight loss. If you are already taking diabetes medication, your doctor will review your current treatment to avoid interactions and adjust doses as needed.
Do you offer the medication without a programme?
No. We do not prescribe GLP-1 medications as a standalone service without proper medical assessment and ongoing monitoring. This is a medical treatment, and we treat it as one. If you are looking for a quick online prescription without medical oversight, we are not the right clinic for you — and we would encourage you to reconsider that approach for your own safety.
📧 Email team@thewellnesslondon.com
📞 Call 020 3951 3429
📍 10 Portman Square, Marylebone, London W1H 6AZ
This article was written by the medical team at The Online GP by The Wellness. Last updated: February 2026. Weight loss medications are prescription-only medicines and are only prescribed after a proper medical assessment. Individual results vary. These medications are not suitable for everyone, and we will never guarantee a prescription before clinical assessment.
