Mounjaro®
Starting from £179.99/mo
Start journey Learn moreMounjaro (tirzepatide) is prescribed in the UK across six doses — 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg and 15 mg — and treatment always starts at 2.5 mg regardless of how much weight someone wants to lose. There is no single "normal" dose; the right dose is the one your prescriber has set for you at this point in your treatment, and it typically increases every four weeks as your body adjusts. Because Mounjaro is a prescription-only medicine, every dose decision is a clinical one, a prescriber assesses your individual health picture before any change is made.
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The 2.5 mg starting dose is not a therapeutic weight-loss dose in the conventional sense. Its job is to introduce tirzepatide to your body gently, reducing the nausea, vomiting and digestive discomfort that are more likely to hit hard if treatment begins at a higher level. Most people find these GI effects settle within a week or two once the body has adapted.
After four weeks at 2.5 mg, your prescriber will typically move you to 5 mg, and the same four-week rhythm continues through each 2.5 mg step up to a maximum of 15 mg. The full Mounjaro dosing schedule maps out what each stage involves and what to expect between them.
Worth knowing: the clinical trials that produced the headline weight-loss figures (SURMOUNT-1, which followed more than 2,500 adults over 72 weeks) used the same phased titration that licensed prescribers follow today. Participants who reached 15 mg saw average body-weight reductions of roughly 20–21%, as reported in the SURMOUNT-1 paper published in the New England Journal of Medicine. The titration schedule existed precisely to get people there safely.
If the nausea at a new dose is more than mild, your prescriber may suggest staying at the current level for an extra four weeks before going up. That is not a failure, it is the schedule doing its job.
There is a common misconception that everyone eventually reaches 15 mg. Many people find a lower maintenance dose works well for them, 7.5 mg or 10 mg often produces meaningful weight loss with a side-effect profile the person can live with. The licensed maximum exists as a ceiling, not a target.
A quick practical check you can do right now: look at the label on your current pen. The strength printed there is your prescribed dose for this four-week period. If it matches what your prescriber discussed with you at your last review, you're in the right place. If the figure surprises you, contact your clinical team before injecting.
For those curious about what 5 mg looks like in everyday terms, the Mounjaro 5 mg pen page covers storage, the injection process and what the first few weeks at that strength typically feel like. Similarly, people who want to understand the volume they're injecting rather than just the dose in milligrams can find that detail on the Mounjaro dose in ml page.
Cost varies by dose, and it is worth understanding how pricing works before committing to a provider. The Mounjaro price guide explains what legitimate private prescriptions typically include and what to watch for.
Yes. If side effects at a higher dose are persistent rather than temporary, a prescriber may step the dose back down. This is a normal clinical decision and does not disqualify someone from continuing treatment. The NHS tirzepatide page notes that managing side effects (rather than pushing through them) is part of safe, effective use.
What a prescriber should never recommend, and what no responsible pharmacy should facilitate, is jumping doses. Moving from 2.5 mg directly to 7.5 mg, for example, removes the tolerability ramp that the schedule is designed to provide. The risk is not just discomfort; it is the kind of severe nausea or dehydration that can lead to someone stopping treatment entirely before it has had a chance to work.
If you missed your second Mounjaro dose or are uncertain whether to take a delayed injection, the answer is always in your Patient Information Leaflet first, and your prescribing team second. Dose timing decisions should not come from general articles.
People transferring to a new provider mid-treatment sometimes ask whether they can continue at their current dose or must restart. At nume, transfer patients are asked to provide evidence of their current treatment before any repeat is issued. A prescriber reviews that evidence personally, the dose is confirmed, not assumed.
Most dose-related questions can wait for a scheduled review. A few cannot. Contact your clinical team promptly if you experience severe stomach pain that radiates towards your back, that is the pattern flagged in the MHRA's Yellow Card guidance as a reason to seek urgent medical attention, given the known association between GLP-1 medicines and acute pancreatitis. Similarly, if repeated vomiting is preventing you from keeping food or fluids down for more than 24 hours, that needs a call rather than a note to mention at the next appointment.
Persistent mild nausea, occasional loose stools or a reduced appetite that feels more pronounced than expected, all of that is typically part of the first few weeks at a new dose. The Mounjaro overview page covers the full side-effect picture and helps distinguish the expected from the unusual.
If you have questions about how Mounjaro fits your situation or want a prescriber to review whether your current dose is working well, starting a free consultation is the straightforward next step.
The people
Superintendent Pharmacist (GPhC No. 2217101)
Accountable for the safe running of our registered pharmacy, from every dispensing check to every dispatch.
Clinical Lead (GPhC No. 2231744)
Sets our clinical standards and checks everything we publish against current MHRA guidance.
Independent Prescriber (GPhC No. 2084501)
Personally reviews consultations and assesses whether treatment is clinically appropriate, and leads dose adjustments and follow-up checks.
Independent Prescriber (GPhC No. 2083426)
Personally reviews consultations and assesses whether treatment is clinically appropriate, and leads dose adjustments and follow-up checks.