Switching from Vials to Mounjaro 15 mg Pens: What You Need to Know

Switching from Vials to Mounjaro 15 mg Pens: What You Need to Know

If you’ve been using Mounjaro (tirzepatide) in vial form for diabetes or weight management, it’s important to know that Eli Lilly is phasing out the vial format in favor of KwikPens. That includes the 15 mg and 12.5 mg vials, which are already in limited supply and expected to be discontinued soon.

Fortunately, the 15 mg Mounjaro KwikPen is becoming more widely available, and it’s not just a convenient replacement—it’s also a smart way to save money if you’re microdosing.

At Over the Border Meds, we help U.S. patients transition from vials to pens, provide guidance on how to count clicks, and assist with ordering Mounjaro at a more affordable price from licensed Canadian pharmacies.

Why Are Mounjaro Vials Being Phased Out?

Mounjaro was first introduced in vial form in Canada, which allowed for flexible dosing using insulin syringes. This appealed to patients who were starting at low doses, adjusting slowly, or looking to microdose for affordability.

However, Eli Lilly has since shifted its focus to KwikPens, which are:

  • Pre-filled, single-patient-use autoinjectors
  • Easier to use and dose without syringes
  • More standardized for titration schedules

As a result, 12.5 mg and 15 mg vials are being phased out, and the 10 mg vial is also expected to become harder to find over time.

If you’re currently using vials, now is the time to begin planning your switch—especially if you’re concerned about maintaining your dose or saving money.

Mounjaro Kwikpen boxes

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What Is the 15 mg Mounjaro KwikPen?

The 15 mg KwikPen is the highest strength in the Mounjaro KwikPen lineup. Each pen contains enough tirzepatide to deliver a single 15 mg dose once weekly for 4 weeks, which is the final step in Mounjaro’s typical titration schedule.

However, because each KwikPen uses a dial-based dosing mechanism, patients can choose to deliver lower doses by counting clicks, making this pen useful even for those taking smaller weekly doses. Always ensure to speak to your prescriber before doing so.

Mounjaro 15mg Kwikpen

How to Switch from Vials to Pens

 

Here’s what you need to know to make the transition as smooth and cost-effective as possible:

1. Know Your Current Dose

Before switching, confirm the exact dose you’ve been using with the vial. For example:

  • Are you taking 2.5 mg weekly?

  • 5 mg? 7.5 mg?

This will help determine how many clicks you’ll need to dial on the KwikPen to match your current regimen.

2. Understand Click Counting

The Mounjaro KwikPen uses a click mechanism to adjust the dose. With the 15 mg pen:

  • 60 clicks = 15 mg
  • 30 clicks = 7.5 mg
  • 20 clicks = 5 mg
  • 10 clicks = 2.5 mg

This allows patients to microdose and stretch one pen over multiple weeks, making it especially appealing for those who are titrating slowly or managing medication costs. Always consult your medical provider before adjusting your dose, and make sure they approve any reduction if needed.

Over the Border Meds will help you determine:

  • How many clicks to use for your prescribed dose (assuming your prescriber has approved of this)
  • How many doses you can get from each pen
  • How many pen needles you’ll need (pens only come with 4 needles)

3. Get Support with the Transition

Switching from drawing up a vial to using a pen can feel intimidating, but our pharmacists can walk you through it step by step. We’ll:

  • Teach you to safely attach and remove pen needles
  • Show you how to prime the pen and count clicks
  • Explain how to store and discard used pens
  • Answer questions about side effects and dose timing

We’re here to ensure your treatment stays consistent and affordable.

4. Plan for Savings

Ordering Mounjaro pens from the U.S. can cost over $1,100 per month without insurance. But by switching to the 15 mg KwikPen and microdosing, you may be able to reduce your monthly cost dramatically.

At Over the Border Meds, U.S. patients can order:

  • Mounjaro 15 mg KwikPen (60 mg of Tirzepatide) for approximately $799 USD
  • Use coupon code: MounjaroIsBack for 10% off your first order

📦 Learn more or start your order here: Over the Border Meds

❓ Common Questions About Switching to KwikPens

 

Can I still get 15 mg vials?

No. These are already in very limited supply and are no longer being restocked. Some pharmacies may still have 10 mg vials for now, but they’re expected to be phased out too.

Do I need a new prescription to switch to pens?

Not necessarily. If your prescription lists a dose (e.g., “Mounjaro 5 mg once weekly”), we can help determine the appropriate pen strength and number of pens needed based on your dosing and frequency.

Is click counting accurate and safe?

Yes, as long as you are trained on how to do it. Our pharmacy team will provide guidance to ensure you’re getting the correct amount each time you inject.

Will I need extra pen needles?

Yes—each pen only comes with 4 needles. If you’re microdosing and using the pen multiple times per week, you’ll need additional needles. We’ll help you calculate how many to order and provide recommendations.

 

Final Thoughts

As Eli Lilly phases out Mounjaro vials, switching to the 15 mg KwikPen is becoming the new standard for those ordering from Canada to the U.S. This change may feel inconvenient at first, but it also opens up new ways to save—especially for patients using click-counting to microdose.

At Over the Border Meds, we’re proud to support American patients through this transition. Whether you’re new to Mounjaro or already using a lower dose, our team will work with your doctor and help you adjust to the pen format, determine your dosing, and ensure you’re getting the best value possible.

📌 Have questions? Need help switching? Visit Over the Border Meds to get started or contact our support team today.