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Progesterone Side Effects and How to Manage Them
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Women's Health
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Breast Tenderness and Mood Changes
Breast tenderness or pain is one of the most frequently reported side effects (1,2). Mood changes, irritability, tiredness, and stomach upset or bloating are also listed (2).
These effects often overlap with menopause symptoms themselves, which makes them hard to tell apart. A simple note of when symptoms start, relative to your dose, gives your provider much more to work with.
Doses Are Set by the Reason You Take It
The label describes different doses for its two approved uses, and these are reported findings rather than the dose anyone should expect (1).
Approved use | Dose described in the label | How it is taken |
|---|---|---|
Protecting the uterine lining during estrogen therapy | 200 mg | At bedtime for 12 days in each 28-day cycle (1) |
Restarting periods that have stopped | 400 mg | At bedtime for 10 days (1) |
Your provider may prescribe a different schedule based on your history and the estrogen you use. The overview of estradiol and progesterone care covers the estrogen side of a combined plan.
The Boxed Warning Covers Estrogen Plus Progestin Therapy
The progesterone label carries a boxed warning about estrogen plus progestin therapy (1). It states that this combination should not be used to prevent heart disease or dementia (1).
The warning describes results from the Women's Health Initiative, in which estrogen plus progestin was linked to higher rates of heart attack, stroke, invasive breast cancer, and blood clots in the lungs and legs in postmenopausal women aged 50 to 79 over about 5.6 years (1). It also reports a higher rate of probable dementia among women aged 65 and older in a related study (1).
Your provider weighs these findings against your symptoms, age, and health history before prescribing, which is why the screening questions are worth answering carefully. If you want that review, check your eligibility for menopause care.
Some People Should Not Take Progesterone
The label lists several conditions in which progesterone capsules should not be used (1). This is not a complete list. Review the label and talk to your provider.
Peanut allergy: the capsules contain peanut oil, so anyone allergic to peanuts should never take them (1).
Unexplained vaginal bleeding: bleeding without a diagnosis needs to be investigated before hormone therapy (1).
Breast cancer: a known, suspected, or past breast cancer is a contraindication (1).
Blood clots: an active or past deep vein thrombosis, pulmonary embolism, stroke, or heart attack is a contraindication (1).
Liver disease: known liver dysfunction or liver disease is a contraindication (1).
Certain Symptoms Need Same-Day Care
A few symptoms can signal a serious problem, such as a blood clot or stroke. Seek emergency care for chest pain, sudden shortness of breath, pain or swelling in one leg, sudden vision changes, a severe headache, or trouble speaking (1,4).
Contact your prescriber the same day about any of these, or about unexpected vaginal bleeding (1,4), and ask them whether to continue the medication. The guide to signs perimenopause is ending covers which changes are expected during the transition.
Steps to Take If Side Effects Bother You
These steps help you and your provider decide what to change, if anything.
Take your capsule at bedtime, as the label directs, if you are not already doing so.
Write down which symptoms you notice and how soon after a dose they start.
Note whether symptoms follow your dosing schedule, such as the days you take progesterone.
Message your provider before making any change to how you take it.
Seek urgent care for chest pain, leg swelling, sudden breathlessness, or vision changes.
If you are curious whether hormone therapy is a fit, check your eligibility for menopause care through Mochi Health.
The Bottom Line
Progesterone commonly causes drowsiness, dizziness, breast tenderness, and headache, and the label directs bedtime dosing because of the dizziness and drowsiness. The more serious warnings concern estrogen plus progestin therapy as a combination, and your provider reviews them with your history. Explore progesterone through Mochi Health or Mochi menopause care, then check your eligibility to speak with a provider.
FAQs
Is 200 mg Progesterone a High Dose?
Whether 200 mg progesterone is a high dose depends on the reason you take it. The label describes 200 mg at bedtime for 12 days in each 28-day cycle to protect the uterine lining, and 400 mg for restarting periods (1).
Why Do You Take Progesterone at Night?
You take progesterone at night because the label directs a single bedtime dose, and progesterone can cause dizziness and drowsiness (1). A bedtime dose may reduce the impact of those effects (1).
Can Progesterone Cause Breast Tenderness?
Progesterone can cause breast tenderness, which is one of its most commonly reported side effects (1,2). Tell your provider if it is severe or new, or if you notice a lump.
Who Should Not Take Progesterone?
People who should not take progesterone include anyone with a peanut allergy, unexplained vaginal bleeding, breast cancer, a history of blood clots, stroke, or heart attack, or liver disease, according to the label (1).
References
Progesterone capsules (PROMETRIUM) prescribing information, including boxed warning. U.S. Food and Drug Administration, 2024. Progesterone prescribing information
MedlinePlus. Progesterone: drug information. National Library of Medicine. Accessed October 2026. MedlinePlus progesterone
The 2022 Hormone Therapy Position Statement of The North American Menopause Society Advisory Panel. The 2022 hormone therapy position statement of The North American Menopause Society. Menopause, 2022. pubmed.ncbi.nlm.nih.gov/35797481/
National Library of Medicine. PROMETRIUM (progesterone) capsule label. DailyMed, accessed October 2026. dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=1cf237ff-c4f8-4faa-a7aa-77599c856889
This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication or treatment plan. Progesterone requires a written prescription from a licensed provider. Speak with a provider to determine if progesterone is appropriate for you. Progesterone capsules are FDA approved to prevent thickening of the uterine lining in postmenopausal women with a uterus who are receiving conjugated estrogens, and to treat secondary amenorrhea. Individual results are not guaranteed and may vary from person to person. All professional medical services are provided by licensed physicians and clinicians affiliated with independently owned and operated professional practices. Mochi Health Corp. provides administrative and technology services to affiliated medical practices it supports, and does not provide any professional medical services itself.
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