On this page
Overview
Product & regulatory status
FDA-approved prescription products have defined indications. A compounded progesterone cream is not equivalent by default.
Endometrial effect
Progesterone opposes estrogen-driven endometrial proliferation in the appropriate treatment setting. [1]
What the evidence shows
Endometrial-protection trial
The oral-capsule label describes a randomized study of 358 postmenopausal women with a uterus. Over three years, hyperplasia occurred in about 6% receiving progesterone plus conjugated estrogen versus 64% with estrogen alone. This supports the studied combination and formulation. [1]
Menopausal-symptom research
A study in 133 healthy early postmenopausal women found oral micronized progesterone improved vasomotor symptoms. Its selected population and limited duration do not establish treatment for every sleep complaint or guarantee the same result during perimenopause. [2]
What remains unknown
The effectiveness of a particular compounded cream for protecting the endometrium cannot be inferred from oral-capsule trials. Long-term symptom benefits require their own evidence.
Safety
Sedation and dizziness
Oral progesterone can cause substantial dizziness or drowsiness. These effects matter when judging tolerability and activities requiring alertness. [1]
Check inactive ingredients
Some progesterone capsules contain peanut oil. The actual dispensed product’s ingredient list is important for allergy assessment. [1]
Keep trial results attached to the product
The cited protection trial used oral micronized capsules with a specific estrogen regimen. It was not a trial of a skin cream. [1]
Understanding product quality
Compounded drugs are not FDA-approved finished products. Poor preparation can cause contamination or incorrect strength. A catalog entry or a research paper is not a quality assessment of your product. [3]
When to seek urgent help
Severe allergic symptoms such as trouble breathing, throat or tongue swelling, or fainting need immediate help. Call 911 or your local emergency number. This is general emergency information, not a complete list of risks for this compound. [4]
A starting point for discussion
This is not a complete list of adverse effects or interactions. Your health history, other medicines, and the exact formulation matter. Missing safety data is not evidence of safety.
Common questions
Is progesterone the same as every progestin?
No. Different molecules and formulations should be identified explicitly when interpreting a study or risk estimate.
Does a cream prove my uterus is protected?
The presence of progesterone on a label does not establish the exposure or protection demonstrated with a studied oral product.
Questions for your clinician
Does the evidence match my condition and this exact product? What risks or interactions matter for me? How would we assess whether it is helping?
Sources
- Progesterone-capsule prescribing informationUS oral micronized progesterone label; three-year endometrial study, dizziness/drowsiness and product ingredients.
- Progesterone and severe vasomotor symptomsMenopause International, 2012; analysis of a randomized controlled study in 133 healthy early postmenopausal women.
- Compounding and the FDA: Questions and AnswersFDA · product quality and regulation
- AnaphylaxisMedlinePlus · recognizing an emergency
Educational information, not a recommendation to use a compound. Kairo does not give dosing advice. Review decisions with a licensed healthcare professional.