Is Compounded Progesterone Safe and Legal?
Compounded progesterone is legal when prescribed by a licensed provider. It is the bioidentical form of progesterone used in most modern HRT protocols.
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Progesterone is the primary progestin produced by the ovaries during the luteal phase. FDA-approved bioidentical progesterone (Prometrium, micronized progesterone capsules) is widely available, but compounding pharmacies prepare progesterone in custom strengths and delivery forms — topical creams, vaginal suppositories, troches, and combination products with estradiol — that are not available commercially. Compounded progesterone is legal under Section 503A when a licensed prescriber determines a commercial product is not suitable.
Who Is Eligible for Compounded Progesterone?
- Requires a valid prescription from a licensed U.S. healthcare provider.
- Commonly prescribed for perimenopausal symptoms, endometrial protection in women on estrogen therapy, luteal-phase support, and sleep and mood symptoms.
- Women with an intact uterus who take estrogen typically need progesterone to protect the endometrium.
- Compounded strengths are often chosen for micro-dosing, combination products, or peanut-oil-free alternatives for women with peanut allergies (branded Prometrium contains peanut oil).
Safety Considerations
- Oral progesterone has a sedating effect — typically taken at bedtime.
- Topical progesterone creams have limited systemic absorption; they may not reliably protect the endometrium in women on systemic estrogen without provider oversight.
- Vaginal progesterone provides strong endometrial effect with lower systemic exposure, useful in women with migraine or mood sensitivity to oral progesterone.
Red Flags: What to Avoid
- Over-the-counter "progesterone creams" marketed without prescription — these are typically low-potency wild yam extracts and are not the same as compounded bioidentical progesterone.
- Pharmacies that will not specify the strength or base of the cream.
- Providers recommending topical progesterone as the sole endometrial protection for women on systemic estradiol — evidence is weak.
Frequently Asked Questions
What is the difference between compounded progesterone and Prometrium?
Prometrium is the FDA-approved bioidentical progesterone capsule — it contains micronized progesterone in peanut oil. Compounded progesterone contains the same bioidentical molecule but can be prepared in different strengths, bases (for patients with peanut allergy), and delivery forms (vaginal suppositories, creams, troches, combination products). The active ingredient is the same.
Is progesterone cream enough to protect my uterus if I'm on estrogen?
Evidence suggests topical progesterone creams do not reliably achieve the systemic progesterone levels needed to protect the endometrium in women on systemic estrogen. Oral micronized progesterone or vaginal progesterone is generally preferred for endometrial protection. Discuss with your prescriber.
Is compounded progesterone legal?
Yes. Compounded progesterone is legal under Section 503A when prepared by a licensed compounding pharmacy under a valid prescription, provided there is a clinical reason the FDA-approved product is not appropriate — such as allergy to peanut oil in Prometrium, a need for a non-commercial strength, or a specific delivery form.
Keep Reading
Deep dive: Full article on Progesterone from our blog →
Pharmacy basics: 503A vs 503B pharmacies — what's the difference? →
Vetting pharmacies: How to find a reputable compounding pharmacy →
Overview: Compounded Progesterone — overview & pricing →
Compare prices: Compare Progesterone pricing from licensed pharmacies →
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