Progesterone capsules

How Progesterone Capsule works

Estrogen makes the lining of the uterus grow. Progesterone switches that lining from growth mode to a stable, mature state, and stopping or cycling it allows the lining to shed. This counterbalance lowers the risk of endometrial hyperplasia and cancer that comes with estrogen alone. Some of progesterone's breakdown products also act on calming GABA receptors in the brain.

Who it’s for, and who it isn’t

What’s included

• Clinician review of your uterus status, bleeding history and other medicines
• Progesterone capsules included in the hormone therapy program
• Shipping from a licensed U.S. pharmacy
• Choice of continuous or cyclic schedule, set by your clinician
• Follow-up on bleeding patterns, sleep and side effects

Possible side effects

• Drowsiness or grogginess the next morning
• Dizziness, especially when standing up quickly
• Breast tenderness
• Headache, bloating or mood changes
• Spotting or withdrawal bleeding depending on the schedule
• Rare but serious: blood clots, stroke symptoms, allergic reactions

This isn’t a complete list. Your clinician reviews risks, interactions and warnings with you before prescribing. In an emergency, call 911.

What the evidence says

Oral micronized progesterone, in its FDA-approved form, is a well-established way to protect the endometrium during estrogen therapy and is recommended in Menopause Society guidance. Compounded capsules have not been tested in trials or reviewed by FDA. Whether progesterone itself improves sleep is supported mostly by smaller studies and clinical experience.

Why it is not optional with estrogen

Taking estrogen by itself when you still have a uterus raises the risk of endometrial hyperplasia, an overgrowth of the lining, and over time endometrial cancer. This risk is serious enough that FDA-approved estrogen-alone products keep a boxed warning about it, even after FDA removed other boxed warning statements from menopause hormone labels in 2026.

Adding a progestogen in an adequate dose and schedule lowers that risk substantially. Progesterone capsules are the most common choice because the oral micronized form has the strongest evidence for protecting the lining. If you have had a hysterectomy, you usually do not need it.

Progesterone versus progestins

Progesterone is the same hormone your ovaries make. Progestins are lab-made compounds that act on progesterone receptors but also have other effects. Both can protect the uterus. Some research suggests micronized progesterone may have a more favorable profile for breast and clot risk than certain progestins, but the evidence is not definitive, and the right choice depends on your situation.

Compounded and FDA-approved capsules

The capsules prescribed in your plan are compounded by a licensed U.S. pharmacy. Compounded medications are not FDA-approved, are not reviewed by FDA for safety, effectiveness or quality and are not interchangeable with the FDA-approved micronized progesterone capsule. Professional groups including ACOG recommend FDA-approved hormones when they meet your needs.

Because protecting the uterus is a safety function, your clinician pays close attention to the dose, the schedule and any unexpected bleeding. If there is any doubt about absorption or bleeding control, switching to the FDA-approved product is a reasonable option to discuss.

Taking it at night, and the sleep effect

Progesterone capsules are usually taken at bedtime because they can make you drowsy. Many women find this helpful, reporting easier sleep, while others feel groggy in the morning or notice vivid dreams. Do not drive or operate machinery until you know how it affects you, and stand up slowly at night if you feel lightheaded.

Your clinician will choose either a continuous schedule, where you take it every night and often stop having bleeds over time, or a cyclic schedule, where you take it for part of each month and usually have a planned withdrawal bleed.

Progesterone in perimenopause

Progesterone is often the first hormone to fall in the years before your final period, because ovulation becomes less regular. That can mean heavier or more frequent periods, shorter cycles and, for some women, worse sleep in the days before bleeding.

In perimenopause, a clinician may use progesterone as part of a broader plan, sometimes with estrogen for hot flashes, sometimes on its own while cycles are still coming. Heavy or irregular bleeding always deserves a proper look first, since fibroids, polyps, thyroid problems and, rarely, precancerous changes can cause the same pattern. Progesterone is also not a reliable contraceptive, so if pregnancy is still possible you will need a separate plan for that.

Allergies and ingredients

Some micronized progesterone capsules, including the FDA-approved brand, are made with peanut oil. Compounded formulations vary. Tell your clinician about any peanut or other food allergy so the pharmacy can confirm what your capsule contains.

What your clinician monitors

The most important signal is bleeding. Some irregular spotting in the first months is common, especially on a continuous schedule, but bleeding that is heavy, persistent, starts after a long bleed-free stretch or appears after menopause needs evaluation, which may include an ultrasound or biopsy.

Check-ins also cover sleep, mood, breast tenderness and how well your estrogen dose is working. Over time your clinician reviews blood pressure, screening and any new health conditions. Progesterone capsules are included in the hormone therapy plan, which is $349 the first month (including the evaluation and baseline labs) and then $99 a month, confirmed at the eligibility review.

• Report any bleeding after menopause
• Seek urgent care for chest pain, leg swelling, sudden shortness of breath or stroke signs
• Mention new low mood, which a small number of women notice on progesterone

Go deeper on Progesterone Capsule