How to store Mounjaro

Single-dose pen and single-dose vial

The part of the monograph for health professionals words the limit as up to 21 days unrefrigerated, at temperatures not to exceed 30°C.

The instructions for the single-dose pen say that it is not necessary to warm the pen to room temperature.

The patient information gives these rules for the single-dose prefilled pen and the single-dose vial:

• Store Mounjaro in a refrigerator at 2°C to 8°C, up to the expiration date.
• Do not use Mounjaro beyond the expiration date.
• If needed, each single-dose prefilled pen or single-dose vial can be stored at room temperature below 30°C for up to a total of 21 days.
• Store Mounjaro in the original carton to protect it from light.
• Keep Mounjaro out of reach and sight of children.

Mounjaro KwikPen (multi-dose pen)

The storage section of the monograph says to store Mounjaro KwikPen in a refrigerator at 2°C to 8°C up to the expiration date. If needed, each KwikPen can be stored unrefrigerated at temperatures not to exceed 30°C for up to 30 days. It also says to protect Mounjaro KwikPen from light.

The instructions for use of Mounjaro KwikPen give separate rules for unused and used pens:

• Unused KwikPens: store them in the refrigerator at 2°C to 8°C.
• A KwikPen may be used until the expiration date printed on the label if the unused KwikPen has been stored in the refrigerator.
• Used KwikPens: you may store your used KwikPen at room temperature up to 30°C for up to 30 days.
• Keep a used KwikPen away from heat and light.
• Throw away the KwikPen 30 days after first use, even if the KwikPen has medication left in it.
• Throw away the KwikPen after the 4 weekly doses that the pen contains.
• Do not store the KwikPen with the needle attached.
• Do not store the KwikPen without the pen cap attached.

If it froze, was dropped or looks wrong

The monograph says: do not freeze Mounjaro, and do not use Mounjaro if frozen.

It gives these rules:

• If a single-dose pen or a vial has been frozen, throw it away and use a new pen or vial.
• Throw away a KwikPen in a sharps disposal container if it has been frozen.
• The pen, KwikPen and vial have glass parts. If you drop one on a hard surface, do not use it.
• Mounjaro should not be used if the pen, KwikPen or vial is damaged.
• Mounjaro should not be used if it does not appear clear, free of particles, and colourless to slightly yellow.

Disposal

The monograph gives these disposal rules:

• Put a used single-dose pen in a sharps disposal container right away after use. Do not throw pens away in your household trash.
• Throw away all opened vials after use, even if there is medicine left in the vial.
• Put a used needle and syringe in a sharps disposal container right away after use.
• Discard the KwikPen after four weekly doses, in a puncture-resistant container or in accordance with local requirements.
• If you do not have a sharps disposal container, you may use a household container of heavy-duty plastic with a tight-fitting, puncture-resistant lid.
• The household container must also be upright and stable during use, leak-resistant, and labelled to warn of hazardous waste inside.
• When the sharps disposal container is almost full, follow your community guidelines for the right way to dispose of it.
• Do not recycle a used sharps disposal container.
• Keep the disposal container out of the sight and reach of children.

Ask a health professional

This page repeats what the Canadian product monograph says. It is not medical advice. Ask your pharmacist or your prescriber what applies to you.