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Zepbound KwikPen is a multi-dose prefilled pen that delivers tirzepatide, a medicine approved for chronic weight management and for improving obstructive sleep apnea in adults with obesity. Each pen provides four fixed weekly doses, after which it is discarded. Before every dose, KwikPen must be primed.

Some single-dose auto-injector pens are self-contained and do not require priming. However, the Zepbound KwikPen contains multiple doses and can accumulate air bubbles when unused. The manufacturer recommends that users prime the pen before each weekly injection. Skipping this step could lead to incomplete dosing or device malfunction.

This guide explains what priming is, why it matters, and how to do it.

Key Takeaways

  • Priming the Zepbound KwikPen is required before every dose to ensure you receive an accurate dose.
  • If no drop appears after priming, repeat the steps up to three times, or change the needle if needed. Call the manufacturer if it still fails.
  • After priming, dial your dose, inject, and hold the knob for five seconds to ensure full delivery.
  • Dispose of needles safely and never share your pen or reuse needles.
  • Store unused pens in the refrigerator and open pens at room temperature for up to 30 days. Discard after four doses or 30 days.

How the Zepbound KwikPen works

The Zepbound KwikPen is a multi-dose, single-patient-use pen that contains four weekly doses of tirzepatide. The pen is designed so you turn the dose knob until you reach your prescribed dose. After four injections, the pen prevents you from dialing another full dose and should be thrown away.

Each new injection requires a sterile pen needle (not included with the pen), and the needle must be removed and disposed of after each use to prevent contamination and leaking. It is important never to share your pen with others. Doing so can transmit infections.

Why priming matters

When a pen is primed, a small amount of medicine is expelled into the air. This seemingly simple step has important benefits:

    • Removes air bubbles: Priming pushes air out of the cartridge so that each injection delivers medicine rather than air. Leaving air bubbles inside can reduce the dose delivered and may cause under-treatment.
    • Verifies the needle and pen are working: Turning the dose knob and releasing a drop confirms that the needle is unclogged and that the pen mechanism can push liquid through. If no drop appears after priming, you know to change the needle or replace the pen before injecting yourself.
    • Improves dose accuracy: Multi-dose pens rely on mechanical stops to deliver precise amounts. By priming, you start each injection with the plunger in the correct position, which reduces the risk of under- or overdosing.

People sometimes skip priming because they worry about wasting medicine. However, the small amount you expel (usually just a drop) is much less than the potential loss if your entire dose isn’t delivered.

Skipping the priming step can lead to partial or no medication delivery and poor treatment outcomes.

Preparing for Zepbound KwikPen injection

  • Gather supplies: You will need your Zepbound KwikPen, a new sterile pen needle compatible with the pen, an alcohol swab, gauze or a cotton ball, and an FDA-cleared sharps container for disposal.
  • Wash your hands: Clean hands help prevent infection.
  • Inspect the pen: Pull the pen cap straight off and check the label. Make sure the medicine name and strength match your prescription, the pen is not expired or damaged, and the solution is clear to slightly yellow with no particles.
  • Clean the red inner seal: Wipe the red seal at the top of the pen with an alcohol swab.
  • Attach a new needle: Always use a new pen needle for each injection. Remove the paper tab from the outer needle shield and push the capped needle straight onto the pen; twist it until tight. Remove the outer needle shield and keep it for later, then remove and discard the inner shield.

Step-by-step guide to priming the Zepbound KwikPen

Once your pen is prepared and the needle is attached, follow these priming steps before dialing your dose:

Step 1 – Set the pen to the prime position

Hold the pen so you can see the dose window. Slowly turn the dose knob until you hear two clicks and an extended line ( — ) appears in the dose window. This is the prime position. If you go past it, turn the knob forward or backward until the extended line aligns with the dose indicator.

Step 2 – Point the pen upward and tap

Hold the pen with the needle pointing up. Gently tap the cartridge holder so that any air bubbles rise toward the top. This helps ensure that the expelled liquid will carry the bubbles out of the pen.

Step 3 – Expel a drop of medicine

Push the dose knob in until it stops and hold it in while you slowly count to five. Now, you should see a (0) icon in the dose window. Do not inject into your body. A small drop of medicine should appear at the needle tip. This drop confirms the pen is primed.

If no medicine appears:

  • Repeat the priming steps (turn to the prime position, tap, and push the knob) up to two more times.
  • If you still do not see a drop, change the pen needle and repeat the priming process once more.
  • If priming continues to fail, contact the manufacturer at 1-800-LillyRx or call your healthcare provider.

Important notes to remember about priming:

  • Always prime before every weekly injection.
  • The dose knob should not be turned past the prime position more than needed. If you accidentally dial a dose while priming, dial backward to align the extended line again.
  • Never inject the small amount of medication expelled during the priming step into your body or into anything else. It should be released into the air or onto a tissue.

Selecting and administering your dose after priming

Once your pen is primed, you’re ready to dial your weekly dose and inject:

1. Dial the prescribed dose: Turn the dose knob all the way until it stops, and the (1) icon appears in the window. Do not count clicks, simply turn until it stops.

2. Choose an injection site: You can inject into the thigh or stomach at least two inches away from the belly button. A caregiver can inject into the back of your upper arm. Rotate injection sites each week to reduce skin irritation.

3. Inject the dose: Insert the needle under your skin at the selected site and push the dose knob in until it stops. Hold the knob in and count slowly to five to ensure the full dose is delivered. Make sure the dose window shows the (0) icon before removing the needle.

4. Remove the needle and dispose safely: Pull the needle out of your skin. Replace the outer needle shield, unscrew the needle, and put it in a sharps container. Do not store the pen with a needle attached, as this can introduce air and leakage.

5. Recap and store the pen: Replace the pen cap and store according to the manufacturer’s instructions. Unused pens should be refrigerated at 36 °F to 46 °F; opened pens may be kept at room temperature (up to 86 °F) for 30 days. Discard the pen after four doses or 30 days, even if some medicine remains.

Troubleshooting the Zepbound KwikPen and tips

    • If the dose knob sticks or doesn’t turn: Ensure the needle is attached correctly and that you are not at the end of the pen’s four-dose life. If the pen is empty, you will not be able to dial a full dose.
    • If you see bubbles after priming: Small bubbles in the cartridge after priming are usually harmless and will not affect your dose. However, large bubbles may form when the pen is shaken or exposed to temperature changes. Priming helps remove them.
    • Never share your pen: Sharing pens can spread infections; even changing the needle does not make it safe.
    • Remember your schedule: Set a reminder on your phone or calendar to take your weekly dose on the same day each week. If you miss a dose, follow your healthcare provider’s instructions for what to do next.
    • Discuss side effects: Common side effects include nausea, diarrhea, and stomach upset. If you experience severe or persistent symptoms, contact your provider. The prescribing information warns about possible risks such as pancreatitis, gallbladder disease, or thyroid tumors. Report any unusual symptoms promptly.

Bottom line

Priming your Zepbound KwikPen before each weekly dose takes only a few moments but is essential for safe and effective treatment. By expelling a drop of medicine before injecting, you remove air bubbles, confirm the needle and pen are functioning, and set yourself up for accurate dosing.

If you ever have questions or trouble with your pen, reach out to your healthcare provider or call Lilly’s support line. Making priming part of your weekly routine is a small step that supports your journey toward better health.

Frequently Asked Questions

Yes. Lilly’s Instructions for Use say to prime the Zepbound KwikPen before each weekly injection because priming removes air from the cartridge and checks that the pen works correctly.

The regular Zepbound single-dose pen is used once and then discarded. The Zepbound KwikPen is a multi-dose, single-patient-use pen that contains 4 fixed weekly doses and requires a new compatible pen needle for each injection.

You can use one Zepbound KwikPen for 4 weekly doses. After the fourth dose, throw it away, even if medicine is still visible inside.

The KwikPen may feel more convenient because it is prefilled and does not require drawing medicine into a syringe, but it still needs separate pen needles and priming. Vials require a syringe and needle, so the better option depends on your comfort level, cost, supply access, and your healthcare provider’s guidance.

Yes, you need to buy separate KwikPen-compatible pen needles. They are not included with the Zepbound KwikPen package because Eli Lilly does not manufacture pen needles. One popular option is the BD Nano Pen Needle, priced at $4.99 for a 5-pack. It has a 32G gauge and 4 mm length, which is the needle size most commonly recommended for Zepbound KwikPen users.

Unused Zepbound KwikPens should stay refrigerated at 36°F to 46°F. After first use, the pen may be stored at room temperature up to 86°F, but it must be discarded 30 days after first use or after 4 weekly doses, whichever comes first.

After you have taken 4 weekly doses, the KwikPen should be considered finished. The pen is designed to prevent you from dialing another full dose after the fourth dose, and any leftover medicine should not be injected.

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Sources

INSTRUCTIONS FOR USE OF ZEPBOUND KWIKPEN. https://pi.lilly.com/us/zepbound-kwikpen-us-ifu.pdf