ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It works by making the uterus unfriendly to sperm.
What it's used for
- Preventing pregnancy
- Emergency contraception (within 5 days)
How to take it
- Placed by a clinician in an office visit.
- Check the strings as directed.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Heavier or more painful periods (often first months)
- Cramping
- Spotting
Call 911Severe belly pain or a positive pregnancy test
Call your provider todayFever, pelvic pain, or unusual discharge
Call your provider todayCan't feel the strings
Warnings
- It doesn't protect against STIs.
Other medicines, foods, and alcohol
- None.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Remove if pregnant; see your provider right away.
Missed doses, overdose, and storage
If you miss a dose
Not applicable: it works continuously. Mark the replacement date.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Copper IUD (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.