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Common Brand Name(s): Prometrium
This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
Progesterone is sometimes used with another medication (a type of estrogen) as combination hormone replacement therapy (HRT) in women after menopause. Combination HRT can rarely cause very serious side effects such as heart disease (such as heart attacks), stroke, serious blood clots (such as in the lungs and legs), dementia, and breast cancer. Some of these risks appear to depend on the length of treatment and other factors. Combination HRT should be used for the shortest possible length of time at the lowest effective dose so you can obtain the benefits and minimize the chance of serious side effects from long-term treatment. Combination HRT should not be used to prevent heart disease or dementia. Discuss the risks and benefits of treatment and your personal health history with your doctor. If you take combination HRT, check with your doctor regularly (such as every 3-6 months) to see if you still need to take it.
If you use this medication for an extended period, you should have a complete physical exam at regular intervals (such as once a year) or as directed by your doctor. See Notes section.
Progesterone is a type of female hormone (progestin). This medication is similar to the progesterone that your body naturally makes and is given to replace the hormone when your body is not making enough of it. In women who are not pregnant and not going through menopause, this medication is used to restore normal menstrual periods that have stopped for several months (amenorrhea).
Progesterone is also used as part of combination hormone replacement therapy with estrogens to reduce menopause symptoms (such as hot flashes). Progesterone is added to estrogen replacement therapy to reduce the risk of cancer of the uterus.
This medication is not for use in children.
Progesterone must not be used to test for pregnancy.
This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
This drug may also be used to maintain pregnancy.
Read the Patient Information Leaflet provided by your pharmacist before you start using this drug and each time you get a refill. If you have any questions, consult your doctor or pharmacist.
Take this medication by mouth as directed by your doctor, usually once a day at bedtime. If you have trouble swallowing the pills, take with a full glass of water while standing up. Follow the dosing schedule carefully. Ask your doctor if you have any questions. The dosage is based on your medical condition and response to therapy.
Inform your doctor if your condition does not improve or if it worsens.
Nausea, bloating, breast tenderness, headache, change in vaginal discharge, mood swings, blurred vision, dizziness, or drowsiness may occur. If any of these effects last or get worse, notify your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including:
This medication may rarely cause very serious (possibly fatal) problems from blood clots (such as heart attack, stroke, blood clots in the lungs or legs, blindness). Get medical help right away if any of these very serious side effects occur:
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking progesterone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as peanut oil), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of:
This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).
Notify your doctor beforehand if you will be having surgery or will be confined to a chair/bed for a long time (such as on a long plane flight). You may need to stop the medication for a time or take special precautions because of the increased risk for blood clots. Ask your doctor for more details.
Do not smoke. Smoking combined with this medication further increases your risk for strokes, blood clots, high blood pressure, and heart attacks.
This medication may cause blotchy, dark areas on your face and skin (melasma). Sunlight may worsen this effect. Limit your time in the sun. Avoid tanning booths and sunlamps. Use sunscreen and wear protective clothing when outdoors.
This medication may be used during pregnancy only as directed by your doctor. Discuss the risks and benefits with your doctor.
This drug passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
This medication can affect the results of certain lab tests. Make sure laboratory personnel and all your doctors know you use this medication.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Alberta residents can call PADIS (Poison and Drug Information Service) 24 hours a day at 1-800-332-1414. Canada residents can call a provincial poison control center. Symptoms of overdose may include severe nausea and vomiting.
Do not share this medication with others.
Regular complete physical exams which include lab and/or medical tests (such as blood pressure, breast exam/mammogram, pelvic exam, Pap smear) should be done while you are taking this medication. Follow your doctor's instructions for examining your breasts, and report any lumps right away. Keep all medical and lab appointments. Consult your doctor for more details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
If you have questions about missing a dose or you don't have more medication, contact your healthcare provider or pharmacist.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised January 2023.
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