Progesterone Capsule

 If you have a uterus, progesterone is an essential companion to estrogen therapy; it's not an optional add-on. Estrogen stimulates the uterine lining (endometrium), which is a normal effect of the hormone. Without progesterone to balance it, that stimulation can cause the lining to thicken over time in a way that raises the risk of endometrial cancer. Progesterone regulates this process, keeping it healthy and stable. Women who have had a hysterectomy generally do not need progesterone, since there is no uterine lining to protect. Speak with your clinician about your particular medical history and preferences.

 Yes. The micronized progesterone in your capsule is bioidentical, meaning its molecular structure is identical to the progesterone your body naturally produced before menopause. This is an important distinction from synthetic progestins — compounds like medroxyprogesterone acetate (MPA, sold as Provera) that are designed to mimic progesterone but have a different molecular structure and behave differently in the body. Bioidentical progesterone is derived from plant sources, typically wild yam or soy.

No. One of the advantages of the compounded micronized progesterone we prescribe at Inflexxion Health is that it is formulated without common allergens — no peanut oil, no soy-derived ingredients, and no artificial food dyes. This matters because Prometrium, the brand-name FDA-approved progesterone capsule that many practices prescribe, contains peanut oil as an inactive ingredient and peanut allergy is listed as a contraindication on its label. Prometrium also contains soy-derived lecithin and yellow and red food dyes that vary by capsule strength, which can be a concern for women with sensitivities to these ingredients. By working with a compounding pharmacy, we are able to formulate micronized progesterone in a clean base that delivers the same bioidentical progesterone without the allergen or additive burden. For women who have been told they cannot take Prometrium due to a peanut or soy allergy, or who simply prefer a cleaner formulation, this is a clinical advantage. As always, please share your full allergy history with your clinician so your prescription can be tailored appropriately. 

Yes, for some women, progesterone is a very effective sleep aide. When oral micronized progesterone is metabolized, it produces a byproduct called allopregnanolone, which has a calming, sedative effect on the brain. It acts on some of the same receptors as anti-anxiety medications. For many women, this translates to meaningfully improved sleep quality, which is why the capsule is typically prescribed to be taken at bedtime rather than in the morning. Sleep disruption is one of the most common and debilitating symptoms of perimenopause and menopause, so for women dealing with both hormonal imbalance and poor sleep, progesterone can serve a dual purpose — protecting the uterine lining while also supporting more restful nights. If you find the sedating effect stronger than expected or notice any daytime grogginess, let your clinician know, as timing or dose adjustments may help.