Mounjaro (Tirzepatide)
The first and only dual GIP and GLP-1 receptor agonist, taken as a once-weekly injection.
Assessed and prescribed remotely where appropriate, with medication delivered to your home.
Medically reviewed by Dr Chris Herman, GMC 2376587
Last reviewed 5 September 2026
What Is Mounjaro?
Mounjaro (tirzepatide) is the first and only GIP and GLP-1 receptor agonist, providing dual-action weight management alongside dietary and lifestyle changes.
As with all GLP-1 treatments, dosing starts low and is escalated gradually under clinical review.
Available strengths: 2.5mg–15.0mg. Your clinician will determine the appropriate starting dose and escalation schedule for you.
How It Works
- Acts on two gut hormone pathways (GIP and GLP-1)
- Reduces appetite and increases feelings of fullness
- Slows gastric emptying
Who May Be Suitable
Treatment may be considered for adults who:
- Have a BMI within a clinically defined range
- Have weight-related health conditions (such as hypertension or type 2 diabetes), or
- Meet other medical criteria set out in UK guidance
A full medical history is required before any prescribing decision is made. We do not prescribe for cosmetic weight loss.
How It's Administered
- Self-injected once a week, on the same day each week, using a pre-filled pen
- Injected under the skin (subcutaneously) into the abdomen, thigh, or upper arm
- Injection sites should be rotated each week to reduce irritation
- Your clinician or a member of our team will talk you through injection technique before you start
- Can be taken with or without food, at any time of day
Who Should Not Use This Treatment
Treatment is unlikely to be suitable if you:
- Are pregnant, breastfeeding, or trying to conceive
- Have a personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)
- Have a known hypersensitivity to tirzepatide or any other ingredient in Mounjaro
- Have type 1 diabetes
- Have a history of pancreatitis or severe gastrointestinal disease (this will be reviewed individually)
This is not a complete list. Your clinician will review your full history during assessment.
Common Side Effects
- Nausea, vomiting, or diarrhoea
- Constipation or indigestion
- Abdominal pain or bloating
- Reduced appetite
- Fatigue or headache
- Injection site reactions
Serious Warning Signs
Seek urgent medical attention if you experience:
- Severe, persistent abdominal pain (possibly spreading to your back), with or without vomiting — may indicate pancreatitis
- Pain in the upper right abdomen, fever, or yellowing of the skin or eyes — may indicate a gallbladder problem
- Swelling of the face, lips, tongue, or throat, or difficulty breathing — signs of a severe allergic reaction
- A lump or swelling in the neck, hoarseness, or difficulty swallowing — should be reported promptly
- Symptoms of very low blood sugar if you also take other diabetes medication (shakiness, sweating, confusion)
- Signs of dehydration or kidney problems following prolonged vomiting or diarrhoea
Monitoring We Provide
- An initial clinical assessment covering your medical history, weight, BMI, and relevant health conditions
- Scheduled clinical reviews before each dose increase to check tolerability and progress
- Ongoing access to message our clinical team between appointments
- Periodic review of your weight, side effects, and overall suitability to continue treatment
If You Want To Stop
- You can stop treatment at any time — there is no obligation to continue
- We recommend telling your prescribing clinician so they can advise on stopping safely
- Clinical trial evidence shows weight regain is common after stopping GLP-1 treatment, so your clinician can discuss a plan for maintaining results
- Your subscription can be paused or cancelled in line with our cancellation policy
Cost, Prescription & Delivery
- From £215/month, including your prescription, medication, and ongoing clinical support
- Medication is dispensed by a UK-regulated pharmacy and delivered in discreet, temperature-controlled packaging
- Pricing may vary by dose as your treatment is titrated — your clinician will confirm costs at each stage
- No long-term contract — you can pause or cancel your subscription at any time
Frequently Asked Questions
About Mounjaro
Dosage & Administration
Impact & Side Effects
Common side effects of GLP-1 medicines may include nausea, vomiting, diarrhoea, constipation, abdominal discomfort, and reduced appetite. Treatment outcomes vary between individuals and weight loss is not guaranteed. Mounjaro is prescription-only and offered following clinical assessment.