Medroxyprogesterone Tablets: Uses, Dosage, Side Effects Guide
Comprehensive guide to medroxyprogesterone tablets for irregular periods, endometriosis, and cancer treatment.
| Type of medicine | A progestogen (female hormone) |
|---|---|
| Used for | Irregular or missed periods, endometriosis, and some cancers |
| Also called | Provera® |
| Available as | Tablets |
About medroxyprogesterone
Medroxyprogesterone belongs to a group of medicines called progestogens, which are synthetic versions of the female hormone progesterone. Progestogens are prescribed for several reasons, primarily to regulate menstrual cycles or treat conditions influenced by hormonal imbalances. This medication mimics the natural progesterone produced by the body during the second half of the menstrual cycle, helping to stabilize the uterine lining and prevent abnormal growths.
It is commonly used to address irregular or missed periods (amenorrhea), heavy or abnormal uterine bleeding, and endometriosis, where tissue similar to the womb lining grows outside the uterus, causing pain and infertility. Additionally, medroxyprogesterone is employed in treating certain cancers, such as breast or endometrial cancer, particularly in postmenopausal women, by suppressing hormone-sensitive tumor growth.
The tablets are taken orally and come in various strengths, such as 2.5mg, 5mg, and 10mg, allowing for tailored dosing based on the condition being treated. Unlike contraceptive injections of medroxyprogesterone, these tablets are short-term therapies and do not provide reliable birth control.
Before taking medroxyprogesterone tablets
Who might be prescribed medroxyprogesterone tablets?
Medroxyprogesterone is suitable for women experiencing secondary amenorrhea (missed periods not due to pregnancy), dysfunctional uterine bleeding, or mild to moderate endometriosis. It may also be prescribed for hormone replacement therapy (HRT) alongside estrogen to prevent endometrial hyperplasia, or for palliative treatment of advanced endometrial or renal cell carcinoma.
Who should not take medroxyprogesterone tablets?
Certain individuals must avoid this medication due to serious health risks. Do not take medroxyprogesterone if you are allergic to medroxyprogesterone acetate or any ingredients in the tablets, pregnant, or suspect pregnancy. It is contraindicated in those with current or past breast cancer, blood clots in veins (venous thrombosis) or arteries (arterial thrombosis), liver disease, or porphyria.
- History of severe circulatory disorders.
- Undiagnosed vaginal bleeding.
- Known or suspected pregnancy, as it may harm the fetus.
- Active or recent arterial disease, such as stroke or heart attack.
Can you take medroxyprogesterone tablets if you are pregnant or breastfeeding?
Medroxyprogesterone is not recommended during pregnancy due to potential risks to the developing baby, including birth defects. A pregnancy test may be required before starting treatment. If pregnancy occurs while taking it, discontinue immediately and consult a doctor. Small amounts pass into breast milk, so discuss risks with your healthcare provider if breastfeeding; it may affect milk production.
Important considerations
Inform your doctor if you have or have had blood clots, heart disease, migraines, asthma, epilepsy, diabetes, high blood pressure, or any vaginal bleeding other than normal periods. Caution is advised in patients with kidney disease, depression, or a history of liver problems. Regular monitoring, including blood pressure checks and breast exams, is essential.
These tablets do not protect against sexually transmitted infections or provide contraception. Use additional birth control methods if needed, and avoid becoming pregnant during treatment.
How and when to take medroxyprogesterone tablets
Your dose depends on the condition treated. Always follow your doctor’s instructions and the label. Doses vary: for absent periods, 2.5-10mg daily for 5-10 days starting on a specific cycle day; for irregular bleeding, similar regimens; for endometriosis, 10mg three times daily for 90 days.
| Condition | Typical Dosage | Duration |
|---|---|---|
| Secondary amenorrhoea | 2.5-10mg once daily | 5-10 days, starting day 16-21 of cycle |
| Irregular periods | 2.5-10mg once daily | 5-10 days, days 16-21, for 2-3 cycles |
| Endometriosis | 10mg three times daily | 90 days from day 1 of period |
| Cancer (e.g., breast/endometrial) | 200-600mg daily (higher doses) | As directed, often palliative |
Swallow tablets whole with water, with or without food. If you miss a dose, take it as soon as remembered unless near the next dose. For overdoses, seek immediate medical help. Expect withdrawal bleeding a few days after stopping, mimicking a period.
Getting the most from your treatment
Attend all doctor appointments for progress checks, including breast screening and cervical smears. These tablets are not contraceptives; use barrier methods or discuss options. Maintain a healthy lifestyle, report any unusual symptoms promptly, and do not stop abruptly without advice.
- Keep routine health checks.
- Avoid pregnancy during treatment.
- Monitor for side effects.
Side effects of medroxyprogesterone tablets
Common side effects include breakthrough bleeding, breast tenderness, headaches, nausea, mood changes, weight fluctuations, dizziness, fatigue, sleep issues, libido changes, skin rashes, acne, hair growth alterations, and fluid retention. Most are mild and resolve post-treatment.
| Side Effect | What to Do |
|---|---|
| Headache | Ask pharmacist for painkiller; see doctor if severe |
| Nausea | Eat simple meals, avoid spicy food |
| Irregular periods, breast tenderness, weight changes, dizziness, tiredness, sleep issues, mood/libido changes, rash, acne, hair/skin changes, swelling | Speak to doctor if troublesome |
Serious effects (rare): blood clots (leg pain/swelling, chest pain, breathlessness), allergic reactions (rash, swelling, breathing difficulty), severe headaches, vision changes, jaundice, depression. Seek urgent care for these. Long-term use may increase breast cancer risk or affect bone density.
Monitor for thrombophlebitis, high blood sugar, liver issues, or cervical abnormalities. Report all side effects to your doctor or via official reporting systems.
Frequently Asked Questions (FAQs)
Q: How long does it take for medroxyprogesterone to work?
Withdrawal bleeding typically occurs 3-7 days after stopping a course for menstrual issues. For endometriosis or cancer, symptom relief varies.
Q: Does medroxyprogesterone cause weight gain?
Weight changes due to fluid retention are possible; maintain diet and exercise. Consult your doctor if persistent.
Q: Can medroxyprogesterone be used for contraception?
No, tablets do not reliably prevent pregnancy; use additional methods.
Q: What if I experience bleeding while taking it?
Spotting is common; report heavy or prolonged bleeding.
Q: Is medroxyprogesterone safe for long-term use?
Short courses preferred; long-term requires monitoring for risks like clots or cancer.
When to seek medical advice
Contact your doctor for severe headaches, chest pain, leg swelling, vision/speech changes, unusual bleeding, jaundice, or allergic signs. Regular check-ups are vital.
References
- Medroxyprogesterone tablets – Patient.info — Patient.info. 2023. https://patient.info/medicine/medroxyprogesterone-tablets-provera
- Provera® 2.5mg, 5mg and 10mg Tablets Patient Information Leaflet — Medicines.org.uk (Pfizer). 2023-05-15. https://www.medicines.org.uk/emc/files/pil.3547.pdf
- PROVERA® (medroxyprogesterone acetate) Tablets Labeling — Pfizer/FDA. 2024. https://labeling.pfizer.com/showlabeling.aspx?id=606
- Medroxyprogesterone (oral route) Description — Mayo Clinic. 2024. https://www.mayoclinic.org/drugs-supplements/medroxyprogesterone-oral-route/description/drg-20146771
- Medroxyprogesterone acetate (Provera®) — Macmillan Cancer Support. 2023. https://www.macmillan.org.uk/cancer-information-and-support/treatments-and-drugs/medroxyprosterone-acetate
- How and when to take medroxyprogesterone tablets — NHS. 2024. https://www.nhs.uk/medicines/medroxyprogesterone-tablets/how-and-when-to-take-medroxyprogesterone-tablets/
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