No, you cannot reliably use Mounjaro click counting to get a 2.5mg dose or another custom amount from a 10mg pen. Mounjaro KwikPens are designed to deliver a fixed dose for the strength stated on the pen, rather than a partial dose based on the number of clicks.
Trying to stop the pen part way through an injection or use click counting to estimate a smaller dose can make it unclear how much medicine you have actually received.
If you are using Mounjaro, checking your injection, or looking for information about changing your dose, here is what you need to know. We will explain why click counting is not a reliable way to adjust your Mounjaro dose, what the clicks mean, and how to get the strength prescribed for you.
Key things to know
- Mounjaro KwikPens contain 4 fixed doses of the strength stated on the pen
- The 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg pens each contain 4 doses of 0.6ml
- Counting clicks is not an approved way to measure or adjust a Mounjaro dose
- If your prescribed strength needs to change, speak to your prescriber about getting the appropriate strength
Why You Cannot Get 2.5mg From a 10mg Pen
Every Mounjaro KwikPen delivers a 0.6ml dose. However, the amount of tirzepatide in that 0.6ml depends on the strength of the pen. For example, a 2.5mg pen provides 2.5mg of tirzepatide in each 0.6ml dose, while a 10mg pen provides 10mg in each 0.6ml dose.
The pen is designed to deliver the full dose for its labelled strength. It does not provide a manufacturer approved method for measuring out a smaller amount by counting clicks.
Trying to get a partial dose by stopping the injection early, partially pressing the dose knob, or using an online click chart does not give you a verified dose. If you need 2.5mg, the appropriate option is to use a pen prescribed at the 2.5mg strength rather than trying to alter a 10mg pen.
The Mounjaro KwikPen contains 4 fixed doses, one dose taken weekly. The Instructions for Use explain how to prepare and inject the full dose, rather than how to calculate smaller doses from the clicks.
What the Clicks Actually Mean
You may see online charts claiming that a certain number of clicks equals a particular Mounjaro dose. These calculations are not part of the manufacturer's dosing instructions and should not be used to decide how much Mounjaro to inject.
The Instructions for Use explain that you turn the dose knob until you hear 2 clicks and see the priming position in the dose window. You then turn the dose knob until the 1 icon appears before giving the full 0.6ml dose.
| What you hear/feel | What it means |
|---|---|
| 2 clicks while turning the dose knob before injecting | This is part of the priming process. It is not a dose measurement |
| A click or clicks while using the pen | These are part of the pen's mechanical operation and should not be used to calculate a dose |
If You Need a Different Strength
If you think starting Mounjaro or moving from 2.5mg to 5mg may be appropriate for you, speak to your prescriber. Your dose may need to be reviewed because of side effects, how you are responding to treatment, or other factors.
For adults, Mounjaro usually starts at 2.5mg once a week for 4 weeks. The dose is then increased to 5mg once a week. If needed, further increases can be made in 2.5mg steps after at least 4 weeks on the current dose, up to a maximum of 15mg once a week. Your prescriber will decide whether a dose increase is appropriate for you.
Mounjaro is authorised in the UK for adults with type 2 diabetes and also for weight management in eligible adults who meet the relevant BMI criteria. It is not correct to describe weight management use as off label in the UK.
If you have questions about your dose or Mounjaro treatment, your prescriber or pharmacist can explain which strength is appropriate and how to use your pen. If you are considering treatment for weight management, you can also start a free consultation to discuss your circumstances with a qualified UK healthcare professional.
Additionally, if you want to learn more about Mounjaro as an injectable medicine, including how it works, its dosing schedule, and safety information, visit our detailed product page. Reliable UK specific information can help you understand your treatment and use your medicine as prescribed.
Sources
- Errors Possible When Microdosing (Counting Clicks) to Dose Weight Loss Medicines, ConsumerMedSafety.org
- Mounjaro KwikPen strengths and doses, Eli Lilly and Company
Medical Disclaimer
This page provides general information about the Mounjaro KwikPen and its dosing system. It is not a substitute for personalised medical advice, diagnosis, or treatment. Do not try to estimate or change your Mounjaro dose using click counting or another unofficial method. If you have concerns about your dose, pen strength, or injection technique, speak to your prescriber, pharmacist, or GP.
