Microgestin vs. Mirena

See how Microgestin and Mirena compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Microgestin is a daily oral contraceptive pill, while Mirena is a hormonal IUD placed by a clinician and left in place for up to 8 years.

  • Mirena is the only hormonal IUD also FDA-approved to treat heavy menstrual bleeding, in addition to preventing pregnancy.

  • Microgestin carries estrogen-related clot and cardiovascular warnings that Mirena, a progestin-only device, does not share.

Microgestin vs. Mirena Drug Summary

Microgestin

Microgestin is a combination oral contraceptive containing norethindrone acetate and ethinyl estradiol, taken as a daily pill to prevent pregnancy. It comes in several dose strengths and in both 21-day and 28-day iron-supplement packs.

Mirena

Mirena is a levonorgestrel-releasing intrauterine device placed by a clinician to prevent pregnancy for up to 8 years. It is also FDA-approved to treat heavy menstrual bleeding for up to 5 years in women using it for contraception.

Microgestin vs. Mirena Side Effects

Microgestin

Most common
headache (up to 6.3%)
vaginal candidiasis (up to 6.1%)
nausea (up to 4.6%)
menstrual cramps (up to 4.4%)

Mirena

Most common
abdominal/pelvic pain (up to 22.6%)
amenorrhea (up to 18.4%)
headache/migraine (up to 16.3%)
genital discharge (up to 14.9%)

Microgestin vs. Mirena Dosage

Microgestin

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 1 mg/20 mcg once daily Days 1-21
Maximum dose 75 mg ferrous fumarate Days 22-28
Dose changes 2 increases Every 21 days

Mirena

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose ~21 mcg/day LNG release Day 24
Maximum dose ~7 mcg/day LNG release If needed
Dose changes 2 increases As tolerated

Microgestin vs. Mirena Indications

Microgestin

Microgestin is FDA-approved solely to prevent pregnancy in women who choose oral contraceptives. It does not protect against sexually transmitted infections, and its effectiveness depends on taking a pill at the same time every day.

  • Prevents pregnancy with daily use

  • Not effective against STIs, including HIV

  • Requires consistent daily dosing

  • Available in 21-day and 28-day (Fe) packs

Mirena

Mirena is FDA-approved to prevent pregnancy for up to 8 years and to treat heavy menstrual bleeding for up to 5 years. It does not protect against STIs and is not used for emergency contraception.

  • Prevents pregnancy for up to 8 years

  • Treats heavy menstrual bleeding up to 5 years

  • Placed and removed by a clinician

  • No daily action needed once inserted

Microgestin vs. Mirena Pros and Cons

Microgestin

Microgestin has decades of clinical use and a well-established safety profile, but it carries the class-wide risks of estrogen-containing pills and depends on the user taking it consistently. It is inexpensive and widely stocked at most pharmacies.

Pros

  • No procedure or clinician visit required to start

  • Can be stopped immediately just by not taking it

  • Lower monthly cost, roughly $20 to $50 without insurance

  • Decades of real-world use across many formulations

Cons

  • Requires daily adherence to stay effective

  • Contraindicated in smokers over 35

  • Carries estrogen-related clot and stroke risk

  • Must be taken at roughly the same time each day

Mirena

Mirena eliminates daily dosing and lasts for years once placed, but it requires an in-office insertion procedure and carries device-specific risks. Its higher upfront cost is offset by not needing ongoing purchases for years.

Pros

  • Lasts up to 8 years with a single placement

  • No daily pill to remember

  • Also treats heavy menstrual bleeding

  • Fertility typically returns quickly after removal

Cons

  • Requires a clinician visit for placement and removal

  • Higher upfront cost, roughly $900 to $1,725 per device

  • Risk of uterine perforation or expulsion at insertion

  • No generic version available

Common Symptoms and Related Diseases You Can Explore

Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.