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Medication guide

Levonorgestrel IUS

Provides contraception; some products also treat heavy menstrual bleeding.

Check the name, strength and form on your own prescription or package.

Brand
Mirena
Guidance checked
2026-09-08

About this medication

Provides contraception; some products also treat heavy menstrual bleeding.

How to use it

Insertion and removal require a trained professional. Duration depends on the device and indication.

Pregnancy and breastfeeding

Postpartum and breastfeeding timing affects perforation risk and needs assessment.

Before you use it

Pregnancy, pelvic infection, unexplained bleeding, certain cancers or uterine distortion can preclude use.

Possible side effects

Spotting, cramps and eventually lighter or absent periods.

When to get help

Seek care for fever, severe pelvic pain, suspected pregnancy or possible expulsion.

Other medicines and products

Review all medicines; local hormone delivery differs from oral contraceptives.

Missed doses, storage and accidental exposure

Follow your own product’s missed-dose instructions. If you are unsure, ask the Care365 clinical team before taking an extra dose. Contraceptives, injections and modified-release medicines may need a specific plan.

Keep the original packaging and follow its storage, expiry and disposal instructions. Keep medicines away from children and pets. Ask about refrigeration, after-opening limits and safe sharps disposal when relevant.

For suspected overdose or accidental swallowing, contact poison control or urgent medical care promptly. Call emergency services for breathing difficulty, collapse or a seizure.

References and product information

Sources checked .

Sources checked 2026-09-08. Safety sections are highlights; consult the full product information for complete warnings and instructions.

Check the Canadian Drug Product Database by product name or DIN for current product information.

These practical points come from the Pharmasist patient handout for the same product monograph cited by this guide.

This is a plain-language guide, not the complete monograph. Match the name, strength and form on your package before using product-specific directions.

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