Lo Loestrin Fe vs. Mirena
See how Lo Loestrin Fe and Mirena compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Lo Loestrin Fe is a daily pill with the lowest estrogen dose of any FDA-approved oral contraceptive, while Mirena is a hormonal IUD placed once for years of protection.
Lo Loestrin Fe requires daily adherence and carries cardiovascular warnings for smokers over 35, whereas Mirena needs a clinical procedure for insertion and removal.
Mirena is also FDA-approved to treat heavy menstrual bleeding for up to 5 years, a use Lo Loestrin Fe does not have.
Lo Loestrin Fe vs. Mirena Drug Summary
Lo Loestrin Fe
Lo Loestrin Fe is a combination oral contraceptive containing the lowest estrogen dose of any FDA-approved birth control pill, paired with a progestin and iron supplement. It's taken once daily in a 28-day cycle to prevent pregnancy.
Mirena
Mirena is a hormonal intrauterine device that releases levonorgestrel directly into the uterus. It's placed by a clinician and can prevent pregnancy for up to 8 years, or treat heavy menstrual bleeding for up to 5 years.
Lo Loestrin Fe vs. Mirena Side Effects
Lo Loestrin Fe
Mirena
Lo Loestrin Fe vs. Mirena Dosage
Lo Loestrin Fe
Mirena
| STAGE | DOSE | WHEN |
| Starting dose | 1 mg/10 mcg once daily | Days 1-24 |
| Maximum dose | 75mg ferrous fumarate | Days 27-28 |
| Dose changes | 2 increases | As tolerated |
| 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 |
Lo Loestrin Fe
| STAGE | DOSE | WHEN |
| Starting dose | 1 mg/10 mcg once daily | Days 1-24 |
| Maximum dose | 75mg ferrous fumarate | Days 27-28 |
| Dose changes | 2 increases | As tolerated |
Mirena
| 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 |
Lo Loestrin Fe vs. Mirena Indications
Lo Loestrin Fe
Lo Loestrin Fe is FDA-approved to prevent pregnancy in women who choose oral contraceptives. Some clinicians also prescribe it off-label to help manage acne or other hormone-related symptoms. It does not protect against HIV or other sexually transmitted infections.
Prevents pregnancy with a once-daily pill
Off-label use for acne or hormonal symptom control
Does not protect against HIV or other STIs
Reversible; fertility returns quickly after stopping
Mirena
Mirena is FDA-approved to prevent pregnancy for up to 8 years and to treat heavy menstrual bleeding for up to 5 years in women who also want intrauterine contraception. It is not approved for use as emergency contraception after unprotected sex.
Prevents pregnancy for up to 8 years per device
FDA-approved to treat heavy menstrual bleeding
Not approved for emergency contraception
Long-acting; no daily action required
Lo Loestrin Fe vs. Mirena Pros and Cons
Lo Loestrin Fe
Lo Loestrin Fe is a low-dose combination pill taken daily, offering a familiar routine with quick reversibility. It carries FDA warnings around cardiovascular risk, particularly for smokers over 35, and requires consistent daily use for full effectiveness.
Pros
Taken orally with no insertion procedure needed
Lowest estrogen dose (10 mcg) of any approved oral contraceptive
Can be stopped immediately if side effects occur or pregnancy is desired
Also used off-label to help manage acne and hormonal symptoms
Cons
Requires daily adherence; missed pills reduce effectiveness
Boxed warning for increased cardiovascular risk in smokers over 35
Contraindicated with uncontrolled hypertension or vascular disease
Requires ongoing pharmacy refills and prescription renewal
Mirena
Mirena is a long-acting hormonal IUD placed once and left in for years, ideal for those who want a set-and-forget option. It requires a clinical procedure for placement and removal, and irregular bleeding is common in the early months after insertion.
Pros
Placed once and lasts up to 8 years without daily action
Also FDA-approved to treat heavy menstrual bleeding, not just prevent pregnancy
Hormone stays mostly local to the uterus, limiting systemic estrogen exposure
No daily pill schedule to remember
Cons
Requires an in-office procedure for insertion and removal
Irregular bleeding is common, especially in the first few months
Risk of uterine perforation or device expulsion
No generic version currently available
Common Symptoms and Related Diseases You Can Explore
Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.