Weight management
Tirzepatide vs semaglutide: how the two injections differ
How Mounjaro (tirzepatide) and Wegovy (semaglutide) compare on trial results, side effects and eligibility — with an interactive BMI checker.
Important. Mounjaro is a prescription-only medicine (POM). We cannot supply it on request. A pharmacist must verify your identity, confirm your height and weight in person or by video, and assess clinical suitability before any prescription is issued. We follow GPhC February 2025 guidance — self-reported BMI is not sufficient.
Available treatment
Pharmacist-led · PGD supply
2.5 mg
Week 1–4
Once-weekly injection · Dual GLP-1/GIP agonist
Mounjaro
Tirzepatide · KwikPen · subcutaneous injection
Classification: POM · Supplied under Patient Group Direction
Classification: POM · Supplied under Patient Group Direction
Tap a dose to preview the pen · the pharmacist sets your dose at consultation
New to Mounjaro? You’ll start on 2.5 mg.
DoseSupplyPer week
2.5 mg Starting dose4 doses£32
5 mg Maintenance4 doses£40
7.5 mg4 doses£55
10 mg Maintenance4 doses£60
12.5 mg4 doses£65
15 mg Maintenance4 doses£70
from £32/wk · £129 per pen · 4-dose pen
Weight management · Prescription-only medicine
Mounjaro (tirzepatide): how the once-weekly injection works
A once-weekly injection that acts on two appetite-regulating gut hormones (GLP-1 and GIP). Below: how it works, who it’s licensed for, and how our pharmacist-led programme keeps it safe — every patient assessed in person or by video before any treatment, in line with GPhC February 2025 guidance on the safe supply of weight-loss medicines.
Pay at checkout · fully refunded if not approved · Personal pharmacist review
GPhC-registered pharmacy
Our prescribing pharmacists review every case
Free video consultation
About the medicine
What is Mounjaro?
Mounjaro is the brand name for tirzepatide, a once-weekly injectable medicine that acts on two gut hormone receptors (GLP-1 and GIP). It is licensed in the UK for chronic weight management alongside diet and physical activity in adults who meet specific clinical criteria.
Mounjaro is not a quick fix and is not appropriate for everyone. It is used as part of a longer-term, clinically supervised programme — not a short-term aesthetic treatment.
Based on clinical trial data
Could this work for you?
See the average result from the largest Mounjaro trial for your starting weight. Your pharmacist confirms what’s suitable for you at consultation — there’s nothing to work out first.
Pharmacist-led care
How much could you lose?
Drag to your starting weight to see the average result from the largest Mounjaro trial.
Your weight84kg
You could lose up to*
19kg
*Based on mean body-weight loss of up to 22.5% at 72 weeks in the SURMOUNT-1 trial (tirzepatide 15 mg). Individual results vary. Prescription-only medicine — supplied only after a clinical consultation confirms it’s suitable for you.
Important: the calculators above do not approve or reject you, and the figures are indicative. Eligibility and final pricing are decided by our pharmacists after a full video consultation including BMI verification, medical-history review, and current medications check.
How your dose builds up
Your Mounjaro dose, step by step
Most people start on 2.5 mg for the first month, then move to 5 mg — the usual dose most people stay on. Higher doses are used only if you need them. Your pharmacist sets the pace and the dose you stay on — not everyone needs the highest dose.
Month 1
2.5 mgStarting dose
Month 2+
5 mgUsual maintenance dose
If required
7.5 mg
10 mg
12.5 mg
15 mgMaximum dose
You start on 2.5 mg for your first month to let your body settle in — it’s a starting dose, not the one you stay on. From month 2 the usual dose is 5 mg, which many people stay on long-term. Higher doses (7.5–15 mg) are used only if you need more, stepping up by 2.5 mg no sooner than every 4 weeks and only as tolerated, up to a maximum of 15 mg. Your pharmacist decides and adjusts your dose at consultation — not everyone needs the highest dose. Source: Mounjaro SmPC.
Clear, honest pricing
What it costs
Pricing is confirmed at consultation and depends on the dose and treatment length the pharmacist recommends. Mounjaro is supplied in escalating doses — typically starting at 2.5 mg per week and increasing under clinical guidance.
We will explain the full cost (medicine + dispensing + follow-up consultations) before any payment is taken. There is no charge for the initial consultation if treatment is not clinically appropriate for you.
Be cautious of websites offering Mounjaro at very low prices without an in-person or video consultation, identity verification, or measured BMI. The MHRA has warned about counterfeit GLP-1 injections in circulation. All medicine supplied by Hyde Park Pharmacy is sourced through licensed UK wholesalers.
Estimate your monthly cost
Tap your dose below to see the weekly and monthly price — each chip is colour-coded to its Mounjaro strength. Every pen is a 4-week (4-dose) supply; your pharmacist confirms your actual dose and plan at consultation.
£32per week
£128per month
Indicative pricing. Your exact plan is confirmed at your consultation, and doses are often adjusted over time.
Who it's for
Who may be eligible?
Eligibility is decided by the pharmacist at consultation. As a guide, current UK clinical criteria typically require:
- BMI of 30 or above, or
- BMI of 27 or above with at least one weight-related health condition (e.g. type 2 diabetes, hypertension, dyslipidaemia, obstructive sleep apnoea, cardiovascular disease)
- Aged 18 or over
- Able to attend an initial in-person or video consultation for height and weight verification
- Willing to commit to ongoing follow-up and lifestyle support
Mounjaro is not suitable if you
- Are pregnant, planning pregnancy, or breastfeeding
- Have a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2
- Have a history of pancreatitis
- Have severe gastrointestinal disease (e.g. gastroparesis)
- Have severe kidney or liver impairment without specialist supervision
- Are under 18
This list is not exhaustive. The pharmacist will review your full medical history and current medications during your consultation.
22.5%
average body-weight reduction over 72 weeks in the largest tirzepatide trial.
Source: SURMOUNT-1 (NEJM, 2022). Average trial result; individual results vary. Prescription-only medicine, supplied only after consultation.
Based on clinical trial data
How much weight can you realistically lose on Mounjaro?
In the largest Mounjaro trial, average weight loss rose with the dose. These are average trial results, not a personal promise — your pharmacist sets your dose and confirms what’s right for you.
5 mg−16%
10 mg−21.4%
15 mg−22.5%
Placebo−2.4%
Mean body-weight reduction at 72 weeks, SURMOUNT-1 (tirzepatide), NEJM 2022. Average results in adults with an average starting weight of ~104.8 kg; individual results vary and this is not a prediction of your outcome. Prescription-only medicine — supplied only after a pharmacist consultation.
0–12 weeks
Kickstart
Possible weight loss8–9%
- Start to feel less hungry
- Less “food noise”
- Early progress and more energy
It can take a few weeks to feel the effect as the dose steps up.
12–24 weeks
Positive changes
Possible weight loss12–15%
- A noticeable reduction in bodyweight
- More active, healthier food choices
- Support from your pharmacy team
As the dose increases you should see changes in weight and habits.
24–72 weeks
Sustained weight loss
Possible weight loss16–22.5%
- Continued weight loss
- Improvements in measures like blood pressure or blood glucose
- A long-term plan with your pharmacist
A period of steadier, maintained weight management.
Illustrative trajectory based on SURMOUNT-1 (NEJM 2022); results are supported by diet and physical activity. Individual results vary — your pharmacist confirms what’s suitable for you.
How it works
How treatment works at Hyde Park Pharmacy
1
Get in touch
Message us on WhatsApp, call, or pop in. Tell us you're interested in a Mounjaro consultation and we'll explain the next step.
Today2
Initial consultation
An in-person or video consultation with our pharmacists. We verify your identity, measure or confirm height and weight, and review your medical history.
Usually within 1 working day3
Clinical decision
If treatment is clinically appropriate, the pharmacist issues a prescription under our Patient Group Direction. If it isn't, we'll explain why and discuss alternatives.
Same consultation4
Ongoing support
Regular review consultations to monitor progress, side effects, and dose adjustments. You stay in contact with the same pharmacy team throughout.
Ongoing follow-upReviewed by a UK-registeredPrescribing PharmacistGPhC-registered pharmacy #9011727
Who reviews your case
A prescribing pharmacist reviews and decides on every case.
Every consultation at Hyde Park Pharmacy is reviewed personally by our prescribing pharmacists. We've served the Leeds community from Woodsley Road for years, and we treat online care with the same standard as the counter. If treatment isn't right for you, we'll tell you — and refund you in full.
Superintendent & Independent Prescriber · GPhC #2065619
What to expect
Common side effects to know about
Most side effects are mild and gastrointestinal — they tend to improve as your body adjusts. The most common are:
- Nausea
- Diarrhoea or constipation
- Reduced appetite (this is part of how the medicine works)
- Tiredness in the first few weeks
Less common but more serious side effects (severe abdominal pain, signs of pancreatitis, allergic reactions, vision changes if you have diabetes) require urgent medical attention. We will give you a full information leaflet and emergency guidance at your consultation.
Your safety comes first
Careful by design.
- Prescription-only — and not right for everyone.
- The pharmacist makes the final decision — no automatic approvals.
- Ongoing follow-up as your dose is adjusted over time.
- Works best alongside a balanced diet and activity.
- If it isn't suitable, we tell you why — and refund in full.
- Your data stays confidential (ICO Z334106X).
Questions, answered
FAQ
Do I need a prescription from my GP first?
No. Hyde Park Pharmacy can prescribe Mounjaro under a Patient Group Direction (PGD) after a clinical consultation, provided the pharmacist judges treatment is appropriate for you.
Can I just buy Mounjaro from you over the counter?
No. Mounjaro is a prescription-only medicine (POM). A pharmacist must consult with you, verify your identity and measure (or confirm) your BMI before any supply.
Is the consultation in person or by video?
Either is acceptable. Many patients prefer to come into the pharmacy for the initial consultation, but a video consultation is available where appropriate. Identity and weight verification still apply on video — we will explain how this works when you book.
Can I do it all online without a video call?
No. Following GPhC February 2025 guidance on the safe supply of high-risk medicines, an in-person or video consultation is required for Mounjaro. Self-reported weight on a form is not enough.
How long does treatment last?
Mounjaro is a long-term medicine. Some patients use it for many months or longer; others use it for a shorter period as part of a broader plan. The pharmacist will discuss expected duration at consultation.
What if I'm already on Wegovy or another GLP-1?
Tell us at consultation. Switching between GLP-1 medicines needs careful dose management. We won't supply Mounjaro if you're already getting another GLP-1 elsewhere unless we are coordinating the change properly.
Do you deliver?
Local delivery in LS-postcodes is available. Nationwide delivery may be possible depending on the medicine, dose, and dispatch availability — confirmed at consultation.
Find out if it's right for you — in one free consultation.
No automatic approvals. No pressure. A real prescribing pharmacist reviews your case, and you're refunded in full if it's not suitable.
Start your free consultation →GPhC-registered · Video review included · Confidential · Refunded if not approved
Prefer to talk first? Call 0113 244 1551
Pharmacist-reviewed reading
From our blog
Pharmacist-reviewed explainers to help you understand your options before you book a consultation.
Weight management
Weight-loss medications in the UK: a 2026 overview
A pharmacist's plain-English guide to the UK's prescription weight-loss medicines — Mounjaro, Wegovy, Saxenda, Mysimba and Orlistat — and how the consultation works.
Regulatory information
Regulatory information
Hyde Park Pharmacy is a registered NHS community pharmacy regulated by the General Pharmaceutical Council (GPhC).
- GPhC premises registration: 9011727 (verify on the GPhC register)
- Superintendent pharmacist: Mr Shoyab Umarji (GPhC 2065619)
- Last GPhC inspection: November 2024 — Standards Met
This page provides information about a prescription-only medicine. It is not medical advice. Always discuss your full medical history with a qualified healthcare professional before starting any new treatment. If you experience side effects, report them via the MHRA Yellow Card scheme at yellowcard.mhra.gov.uk.