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Tirzepatide

Mounjaro

Mounjaro is a prescription-only medicine containing the active substance tirzepatide — commonly called a weight-loss medication or weight-loss injection. It acts on two hormone receptors (GLP-1 and GIP) and produces the greatest average weight loss of the current medicines — but is usually also the most expensive. Always use under the supervision of a doctor. Below you'll find neutral, factual information.

What is Mounjaro?

Mounjaro is the brand name for tirzepatide from the manufacturer Eli Lilly, given as a weekly injection.

  • Active substance: tirzepatide
  • Action: dual — GLP-1 and GIP
  • Administration: once a week, subcutaneously
  • Prescription only: yes

How does Mounjaro work?

Tirzepatide activates two hormone receptors (GLP-1 and GIP). This suppresses appetite, slows stomach emptying and improves blood sugar regulation. Because of this dual action, the average weight loss in studies is greater than with single-acting GLP-1 medicines. The dose is increased gradually.

What are the side effects of Mounjaro?

As with other GLP-1 medicines, gastrointestinal complaints are the most common:

  • Nausea, vomiting
  • Diarrhoea or constipation
  • Reduced appetite, abdominal pain
  • Fatigue, headache

Rarer serious risks such as pancreatitis are possible. Read the patient leaflet and discuss it with your doctor.

What does Mounjaro cost per month?

The price of Mounjaro depends heavily on your dose and the provider — there is no fixed price. The dose is built up gradually from 2.5 mg up to a maximum of 15 mg, and the higher the dose, the higher the monthly price. That is why almost every clinic shows a from price (lowest dose) that rises towards the highest dose.

  • Indicative monthly prices range from around €269 (2.5 mg) to €800 (15 mg), depending on the provider.
  • The programme length matters: a longer bundle (3, 6 or 12 months) is often cheaper per month.
  • Check whether the price includes medical guidance (all-in) or whether guidance is billed separately.

Example of a dose scale (renewal price per month, indicative):

DosePrice per month
2.5 mgfrom ± €269–335
5 mg± €349–545
7.5 mg± €449–595
10 mg± €449–645
12.5 mg± €549–670
15 mg± €549–800

Compare the price per dose and per clinic in our comparison tool and cost calculator.

Is Mounjaro covered by insurance?

For type 2 diabetes, Mounjaro can be reimbursed under certain conditions from the basic insurance package in the Netherlands. For weight loss, the rule is: almost never reimbursed. Check your policy with your health insurer. See also our coverage page.

Is Mounjaro dangerous?

Mounjaro is an approved medicine; acceptably safe for its approved indications under medical supervision. Gastrointestinal complaints are common and there are rare serious side effects and contraindications. A doctor will assess suitability. Avoid counterfeit products and purchases without a prescription.

Mounjaro or Ozempic?

Mounjaro produces greater average weight loss (dual action), Ozempic is usually cheaper. The choice is a medical one and depends on your situation. Read the full comparison.

Frequently asked questions

Is Mounjaro stronger than Ozempic?
In studies, tirzepatide (Mounjaro) produces greater average weight loss than semaglutide (Ozempic), but it is more expensive. A doctor makes the choice.
What does Mounjaro cost per month?
Indicatively often €210–€350 for the medication, depending on the dose and provider. Compare current prices per clinic.
Is Mounjaro covered for weight loss?
Almost never from the basic insurance package. For type 2 diabetes sometimes, under certain conditions. Check with your health insurer.
What does Mounjaro 2.5 mg cost?
The 2.5 mg/week starting dose is the lowest and therefore the cheapest step; indicatively from around €269–€335 per month, depending on the provider. The dose is increased gradually, after which the monthly price rises. Compare the price per dose and per clinic.
How quickly does Mounjaro work and when does it start working?
Appetite suppression can be noticeable as early as the first weeks, but visible weight loss comes on gradually over several months as the dose is built up. The pace varies from person to person; a doctor monitors the build-up.
Is Mounjaro dangerous?
Mounjaro is an approved medicine that is acceptably safe for its approved indications under medical supervision. Gastrointestinal complaints are common, serious side effects rare. A doctor assesses suitability; avoid counterfeit products without a prescription.
How do I use the Mounjaro KwikPen?
The KwikPen is a pre-filled pen for a weekly subcutaneous injection. Your doctor or pharmacy will explain how to prepare the pen, set the dose and inject; change the injection site each time. Always follow the patient leaflet.

Official sources on this topic

Independent, authoritative information from official bodies:

Mounjaro is prescription-only. Whether it is suitable and safe for you is always assessed by a doctor. Not medical advice.