Mounjaro
If you’re new to Mounjaro (tirzepatide), one of the first things you’ll want to know is:
“How long does each Mounjaro pen last?”
The answer is simple — each pen is designed to deliver four weekly injections, meaning one pen lasts four weeks when used as prescribed.
At PPRX Online Pharmacy, we supply genuine Mounjaro KwikPens with clear instructions, pharmacist support, and next-day cold-chain delivery across the UK.
How Many Doses Are in a Mounjaro Pen?
Each Mounjaro KwikPen contains enough medicine for four injections (4 doses).
You inject once per week, so one pen lasts four weeks.
Here’s the breakdown:
| Pen Strength | Number of Doses | Duration |
|---|---|---|
| 2.5 mg | 4 doses | 4 weeks |
| 5 mg | 4 doses | 4 weeks |
| 7.5 mg | 4 doses | 4 weeks |
| 10 mg | 4 doses | 4 weeks |
| 12.5 mg | 4 doses | 4 weeks |
| 15 mg | 4 doses | 4 weeks |
You should inject on the same day each week — for example, every Monday or every Friday — to keep your treatment schedule consistent.
How to Use the Mounjaro KwikPen Correctly
- Remove the pen cap and attach a new sterile needle.
- Prime the pen before your first use.
- Set the correct dose (pre-set on KwikPens).
- Inject into the abdomen, thigh, or upper arm.
- Dispose of the used needle safely in a sharps container.
Never share pens or reuse needles, and always store your pen in the fridge (2°C–8°C).
If you’re unsure about usage, the PPRX pharmacist team can guide you step by step.
How Long Can a Mounjaro Pen Be Used After Opening?
Once removed from the fridge and opened for use, a Mounjaro pen can be stored at room temperature (up to 30°C) for up to 21 days, but ideally, it should remain refrigerated when possible.
Unused pens must always be kept refrigerated until your next dose.
Can I Travel with My Mounjaro Pen?
Yes — you can travel safely with your Mounjaro pen if you store it in a cool bag during your journey.
PPRX provides a pharmacist travel letter with every order for airport and customs checks.
You can also request delivery directly to your hotel or serviced apartment while visiting the UK.
➡️ Buy Mounjaro UK – PPRX Online Pharmacy
➡️ Start Your Free Consultation
Why Mounjaro KwikPens Are Popular
- Easy once-weekly injection schedule
- Clear dose markings
- Pre-measured doses reduce user error
- Compact design, ideal for travel
- Lasts 4 weeks per pen — predictable and convenient
Unlike daily injections, Mounjaro’s weekly format means less stress and better compliance — one of the reasons it delivers such consistent results.
Mounjaro Prices at PPRX (October 2025)
Each pen provides four weekly doses — a 4-week supply.
| Strength | Price |
|---|---|
| 2.5 mg | £199.99 |
| 5 mg | £219.99 |
| 7.5 mg | £299.99 |
| 10 mg | £319.99 |
| 12.5 mg | £334.99 |
| 15 mg | £349.99 |
Prices include your consultation, private prescription, and next-day cold-chain delivery.
FAQs
Can I use one Mounjaro pen for more than four weeks?
No. Each pen is designed for four injections only — using it beyond that could give inaccurate doses.
How do I know when my pen is empty?
The dose counter on the KwikPen shows zero when finished. Do not attempt to reuse or refill it.
Can I store Mounjaro pens at room temperature?
Yes, for up to 21 days once opened, but refrigeration is always recommended.
Do I need a new prescription each month?
No — you can order multiple pens after your initial approval for continued treatment.
Pharmacist Review
This article was reviewed by a GPhC-registered pharmacist following MHRA and NICE guidance for tirzepatide prescribing and safe storage.
Start your order today at www.pprx.co.uk
At PPRX UK, we provide:
- Genuine Mounjaro pens, sourced directly from the manufacturer (Eli Lilly)
- Dispensing via a GPhC-registered UK pharmacy
- Professional consultations with UK pharmacists
- Ongoing support, dosage guidance, and repeat supply options
Whether you’re just starting or switching from Ozempic or Wegovy, we’re here to help.
📞 Get in Touch
Visit www.pprx.co.uk or contact us directly to begin your online consultation.
We offer fast, discreet UK-wide delivery and exceptional support throughout your journey.
Mounjaro is a prescription-only medicine. This article is for informational purposes only and does not replace medical advice. Always consult a qualified healthcare provider before starting treatment. nhs
