What is the dose of Prometrium (progesterone) to treat heavy menstrual bleeding?

Prometrium (Progesterone) Dosage for Heavy Menstrual Bleeding

Oral micronized progesterone (Prometrium) should be administered at a dose of 100-200 mg daily for 12-14 days per menstrual cycle to effectively treat heavy menstrual bleeding. 1

Mechanism and Effectiveness

• Progesterone therapy works by stabilizing the endometrial lining and reducing excessive bleeding during menstruation 1
• Cyclic oral progesterone treatment has been shown to reduce menstrual bleeding by up to 87% in women with heavy menstrual bleeding 1
• Progesterone therapy generally results in more regular bleeding patterns and often reduces menses to only light bleeding 1

Dosing Protocol

• Standard dosage: 100-200 mg of oral micronized progesterone (Prometrium) daily for 12-14 days of each 28-day menstrual cycle 1
• Timing: Typically administered during the luteal phase (days 15-26) of the menstrual cycle 1, 2
• Duration: Treatment should be continued for at least 3-6 months to evaluate effectiveness, with periodic reassessment 1

Comparative Effectiveness

• While progesterone therapy is effective, levonorgestrel-releasing intrauterine devices (LNG-IUS) have demonstrated superior effectiveness in reducing menstrual blood loss (71-95% reduction) compared to oral progesterone therapy 1, 3, 4
• Tranexamic acid is also more effective than oral progesterone for reducing heavy menstrual bleeding 2
• However, oral progesterone remains an important treatment option, particularly when other treatments are contraindicated or not preferred by the patient 1

Side Effects and Monitoring

• Common side effects include irregular bleeding and spotting, especially during the first few months of treatment 1
• Other potential side effects include breast tenderness, mood changes, and fluid retention 1
• Regular follow-up is recommended to assess treatment effectiveness and manage any side effects 1

Special Considerations

• For women with hemodynamic instability or severe bleeding that saturates a large pad or tampon hourly for at least 4 hours, higher doses of oral progesterone may be considered for short-term management 1
• Natural micronized progesterone (Prometrium) is preferred over synthetic progestins due to its more physiological and safer profile 1
• In women with cardiovascular risk factors, transdermal progesterone may be preferred over oral administration to minimize systemic effects 1

Alternative Treatment Options

• For women who do not respond adequately to oral progesterone:
  • Levonorgestrel-releasing intrauterine system (LNG-IUS) is highly effective (71-95% reduction in blood loss) 1, 4
  • Tranexamic acid reduces menstrual blood loss by 26-60% 5
  • Endometrial ablation techniques may be considered for women who have completed childbearing 1, 4

Pitfalls and Caveats

• Oral progesterone therapy may be less effective than other treatments such as LNG-IUS or endometrial ablation 3, 4
• Treatment adherence may be challenging due to the cyclical nature of the regimen 2
• Prometrium should not be used in women with a history of hormone-sensitive cancers, active thromboembolic disease, or severe liver dysfunction 1
• Regular monitoring is essential to ensure adequate response and adjust dosing if necessary 1