Common side effects
nausea, vomiting, diarrhoea, constipation, stomach pain, tiredness, reduced appetite, reflux, injection-site irritation, and sometimes hair shedding during weight loss.
Weight loss prescription
Mounjaro: what it is, who it is for, how it is taken, and what it may cost.
Mounjaro contains tirzepatide. It is a dual GIP/GLP-1 receptor agonist. In the UK, Mounjaro is the common tirzepatide brand people see for diabetes and weight management routes. This page gives customers the practical basics before speaking with a qualified clinician.
Customer snapshot
The short version.
- What it is: dual GIP/GLP-1 receptor agonist medicine containing tirzepatide.
- Who it may be for: adults who meet weight-management or type 2 diabetes prescribing criteria, depending on indication and clinician assessment.
- How it is usually taken: once-weekly self-injection using a pre-filled pen.
- Typical private cost: UK online examples list Mounjaro monthly pens from about £177 at lower doses to about £335 at higher doses.
How it works
What customers should understand before starting.
GLP/GIP medicines may help with weight by affecting appetite, fullness, and digestion. Orlistat works differently by reducing fat absorption from food. Results vary and treatment should be reviewed against side effects, health markers, and whether the medicine remains appropriate.
For injection medicines, storage, pen technique, missed-dose instructions, and dose escalation need to be clear. For capsules such as orlistat, meal timing and dietary fat intake are central to how the medicine feels day to day.
Safety and side effects
Common effects and caution points.
Important cautions
history of pancreatitis, gallbladder disease, severe stomach/gut problems, pregnancy/breastfeeding, dehydration risk, diabetes medicines that can cause low blood sugar, and previous allergic reaction should be discussed before treatment.
When to get help
Seek clinical advice for severe or persistent vomiting, dehydration, severe abdominal pain, allergic reaction symptoms, fainting, or anything that feels unsafe after starting.
Buying online
What a responsible online route should include.
A responsible provider should use a real consultation, explain eligibility, give dose instructions, provide pharmacy details, explain side effects, and make follow-up available. Avoid no-consultation sellers, unclear pharmacies, pressure-selling, imported/fake products, and guarantees of risk-free weight loss.