Lo Loestrin Fe vs. Microgestin

See how Lo Loestrin Fe and Microgestin compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Both are combination oral contraceptives that prevent pregnancy, but Lo Loestrin Fe has the lowest estrogen dose of any FDA-approved pill while Microgestin offers higher-dose strengths.

  • Lo Loestrin Fe uses a 24-day active, 2-day low-dose, 2-day iron schedule, while Microgestin follows a traditional 21-day active plus 7-day iron or placebo schedule.

  • Microgestin has been available since 1968 and costs far less than Lo Loestrin Fe, which was approved more recently, in 2010.

Lo Loestrin Fe vs. Microgestin Drug Summary

Lo Loestrin Fe

Lo Loestrin Fe is a combination oral contraceptive containing norethindrone acetate, ethinyl estradiol, and iron, approved in 2010. It has the lowest estrogen dose, 10 mcg, of any FDA-approved birth control pill. It is taken once daily in a 28-day pack with 24 active days, 2 lower-dose estrogen days, and 2 iron tablets.

Microgestin

Microgestin is a combination oral contraceptive containing norethindrone acetate and ethinyl estradiol, first approved in 1968. It comes in multiple strengths, 1/20 and 1.5/30 mcg, and pack lengths, taken once daily with 21 active days followed by placebo or iron tablets.

Lo Loestrin Fe vs. Microgestin Side Effects

Lo Loestrin Fe

Most common
Headache (up to 7%)
Breast tenderness (up to 4%)
Nausea/vomiting (up to 7%)
Bleeding irregularities (up to 5%)

Microgestin

Most common
Headache (up to 6.3%)
Breast tenderness (up to 3.4%)
Vaginal candidiasis (up to 6.1%)
Nausea (up to 4.6%)

Lo Loestrin Fe vs. Microgestin Dosage

Lo Loestrin Fe

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 1 mg/10 mcg once daily Days 1-24
Maximum dose Ferrous fumarate 75 mg/day Days 27-28
Dose changes 2 increases As tolerated

Microgestin

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

Lo Loestrin Fe vs. Microgestin Indications

Lo Loestrin Fe

Lo Loestrin Fe is FDA-approved to prevent pregnancy in women who choose oral contraceptives. Its ultra-low estrogen dose may make it a preferred option for women sensitive to higher estrogen levels or seeking to minimize estrogen-related side effects. Some prescribers also use it off-label to help manage acne or other hormonal symptoms.

  • Prevention of pregnancy

  • Off-label: acne or hormonal symptom management

  • Lowest estrogen dose among FDA-approved pills

  • Not indicated for STI protection

Microgestin

Microgestin is FDA-approved to prevent pregnancy in women who elect to use oral contraceptives. Its long track record and multiple dosing strengths make it a common choice for straightforward, cost-effective contraception. It is not intended to protect against sexually transmitted infections.

  • Prevention of pregnancy

  • Multiple dose strengths for flexibility

  • Long-established treatment history since 1968

  • Not indicated for STI protection

Lo Loestrin Fe vs. Microgestin Pros and Cons

Lo Loestrin Fe

Lo Loestrin Fe offers the lowest estrogen dose available in an FDA-approved pill, which may appeal to women who want to minimize estrogen exposure. As a newer, brand-name product, it tends to carry a higher price tag and less consistent insurance coverage than older generics. Its dosing schedule also requires more precision because the hormone doses are so low.

Pros

  • Contains the lowest estrogen dose of any FDA-approved birth control pill

  • Shorter hormone-free interval may reduce breakthrough symptoms

  • May be a good fit for women sensitive to higher estrogen doses

Cons

  • Roughly $171 to $1,017 per month without insurance, before savings programs

  • Newer formulation with less generic availability

  • Requires strict daily timing given its very low hormone dose

Microgestin

Microgestin has been prescribed for decades and is well understood by both patients and clinicians, with straightforward dosing and broad generic availability. Its higher estrogen dose compared with Lo Loestrin Fe may cause more estrogen-related side effects in sensitive individuals. Because it is an older generic, it is typically far less expensive and more consistently covered by insurance.

Pros

  • Decades of clinical use and well-established safety data since 1968

  • Available in multiple dose strengths to fit different needs

  • Roughly $20 to $50 per month without insurance, well below many newer brands

Cons

  • Higher estrogen dose than Lo Loestrin Fe, which may increase side effects for some

  • Traditional 21/7 or 24/4 schedule offers less flexibility than newer regimens

  • Not available in an ultra-low-estrogen formulation

Common Symptoms and Related Diseases You Can Explore

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