Prometrium vs. Bijuva

See how Prometrium and Bijuva compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Prometrium is a standalone progesterone capsule used to protect the uterus during estrogen therapy, while Bijuva combines estradiol and progesterone in one pill for hot flashes.

  • Both use bioidentical hormones, but Prometrium is paired with a separate estrogen prescription while Bijuva delivers fixed-dose estrogen and progesterone together in a single capsule.

  • Prometrium carries a peanut oil warning and several off-label uses, whereas Bijuva is FDA-approved only for moderate to severe menopausal hot flashes.

Prometrium vs. Bijuva Drug Summary

Prometrium

Prometrium is an oral micronized progesterone capsule, chemically identical to the body's own hormone, taken at bedtime. It's FDA-approved to protect the uterine lining in postmenopausal women using estrogen therapy and to treat secondary amenorrhea, with several off-label uses in fertility and pregnancy care.

Bijuva

Bijuva is a combination oral capsule containing bioidentical estradiol and progesterone in a single dose, taken daily with food. It's FDA-approved specifically to treat moderate to severe hot flashes caused by menopause in women who still have a uterus.

Prometrium vs. Bijuva Side Effects

Prometrium

Most common
Dizziness (up to 16%)
Breast pain (up to 11%)
Headache (up to 10%)
Abdominal pain (up to 10%)

Bijuva

Most common
Breast tenderness (up to 10.4%)
Headache (up to 4%)
Nausea (up to 3.5%)
Vaginal bleeding (up to 3.4%)

Prometrium vs. Bijuva Dosage

Prometrium

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 200 mg once daily At the start
Maximum dose 400 mg once daily If needed
Dose changes 1 increase As tolerated

Bijuva

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 0.5 mg/100 mg once daily At the start
Maximum dose 1 mg/100 mg once daily If needed
Dose changes 1 increase As tolerated

Prometrium vs. Bijuva Indications

Prometrium

Prometrium is approved to prevent endometrial hyperplasia in postmenopausal women taking estrogen and to treat secondary amenorrhea. Doctors also prescribe it off-label for fertility treatment, pregnancy support, and broader hormone replacement regimens.

  • Prevents endometrial hyperplasia with estrogen therapy

  • Treats secondary amenorrhea

  • Off-label: luteal phase support in IVF

  • Off-label: preterm birth prevention

Bijuva

Bijuva is approved only to treat moderate to severe hot flashes related to menopause in women who have a uterus. It is not indicated for endometrial protection alone, prevention of heart disease, or use after hysterectomy.

  • Treats moderate to severe menopausal hot flashes

  • Requires an intact uterus

  • Not approved for endometrial protection alone

  • Not approved for use without a uterus

Prometrium vs. Bijuva Pros and Cons

Prometrium

Prometrium has decades of use as a standalone progesterone and can be paired with any estrogen product, offering flexible dosing. It carries boxed warnings for cardiovascular and dementia risk when combined with estrogen, and its peanut oil base rules it out for people with peanut allergies.

Pros

  • Long track record since its 1998 approval

  • Can be paired with any estrogen product

  • Off-label uses in fertility and pregnancy care

Cons

  • Contains peanut oil; unsafe for peanut allergy

  • Requires a separate estrogen prescription

  • Boxed warning for cardiovascular and dementia risk

  • Typically costs more than Bijuva out of pocket ($497 to $936 vs $257 to $351 per month)

Bijuva

Bijuva combines bioidentical estrogen and progesterone in one capsule, simplifying dosing for hot flash relief. It has a narrower approved use than Prometrium and no generic option, though its cash price tends to run lower each month.

Pros

  • Single capsule combines estrogen and progesterone

  • Lower monthly cash price than Prometrium ($257 to $351 vs $497 to $936)

  • Only FDA-approved bioidentical combo pill available

Cons

  • Approved only for hot flashes, not other uses

  • Not approved for women without a uterus

  • No generic version currently available

  • Absorption depends on taking it with a fatty meal

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