Micronized Progesterone for Prolonged Bleeding
Dosing Regimens
- Micronized progesterone should be prescribed at a dose of 200 mg daily for 12-14 days per month in a sequential regimen, or 100 mg daily for 25 days per month in a continuous regimen to effectively control bleeding and provide endometrial protection 1, 2, 3
- Micronized progesterone 200 mg daily for 12-14 days every 28 days can be used in a sequential regimen 2, 3
Clinical Considerations
- Micronized progesterone is preferred over synthetic progestins due to its lower risk of cardiovascular disease and venous thromboembolism 4
- Micronized progesterone has a neutral effect on blood pressure 5
- Micronized progesterone has a better safety profile in terms of thrombotic risk 5
- Micronized progesterone has no negative effects on lipid metabolism 1
- For patients with prolonged bleeding, evaluate endometrial thickness by ultrasound before initiating therapy 6, 4
- Treatment effectiveness should be evaluated after 3-6 months 1
- If bleeding persists despite treatment with micronized progesterone, consider adding low-dose estrogen if medically eligible 7
- If bleeding persists despite treatment with micronized progesterone, consider using NSAIDs for short-term treatment (5-7 days) during days of bleeding 7
Monitoring
- Assess bleeding pattern after 3 months of therapy 1
- Monitor endometrial thickness with ultrasound if clinically indicated 6
Common Pitfalls to Avoid
- Inadequate duration of treatment (less than 12 days per month) may not provide sufficient endometrial protection 1, 2
- Not considering the patient's preference regarding withdrawal bleeding when selecting between sequential and continuous regimens 4
- Stopping treatment prematurely before the full therapeutic effect is achieved (minimum 3 months) 1