How should I evaluate and manage a 34-year-old woman presenting with heavy menstrual bleeding accompanied by dizziness and nausea?

Immediate Evaluation and Management of Heavy Menstrual Bleeding with Dizziness and Nausea

This 34-year-old woman requires immediate assessment for hemodynamic instability and severe anemia, followed by acute bleeding control with high-dose hormonal therapy or tranexamic acid, and evaluation for underlying bleeding disorders.

Initial Assessment

Hemodynamic Evaluation

Check orthostatic vital signs (blood pressure and pulse both lying and standing) immediately 1. Dizziness with heavy menses strongly suggests significant blood loss and potential hemodynamic compromise.

Laboratory Workup

• Complete blood count to assess hemoglobin and hematocrit - severe anemia (hemoglobin <7 g/dL) may require transfusion 2
• Serum ferritin - essential marker of iron stores, often depleted before anemia develops 1, 3
• Pregnancy test (beta-hCG) - must be ruled out before any intervention 4
• Thyroid-stimulating hormone and prolactin - screen for endocrine causes of ovulatory dysfunction 5
• Coagulation screening if history suggests bleeding disorder: PT/PTT, von Willebrand panel, platelet function studies 1, 6

Bleeding Disorder Assessment

Up to 20% of women with heavy menstrual bleeding have an underlying inherited bleeding disorder 7. Red flags include:

• Clots ≥1 inch diameter
• "Flooding" (changing pad/tampon more than hourly)
• Personal or family history of bleeding symptoms
• Prolonged bleeding (>7 days) 6

If suspected, coordinate with hematology for comprehensive evaluation 1.

Acute Management

For Hemodynamically Stable Patients

First-line medical options 8:

1. High-dose combined oral contraceptives: Monophasic pills containing 30-35 mcg ethinyl estradiol, given 3 times daily for 7 days, then taper to twice daily for 7 days, then once daily 8

2. Tranexamic acid: 1300 mg orally three times daily during menses (or 10 mg/kg IV if unable to take oral) - this is a non-hormonal option that reduces menstrual blood loss by 40-50% 1, 8

3. High-dose progestin: Medroxyprogesterone acetate 20 mg three times daily for 7 days, then taper 8

4. NSAIDs: Ibuprofen 600-800 mg three times daily reduces bleeding by 20-50% and can be combined with hormonal therapy 4, 8

For Hemodynamically Unstable or Severely Anemic Patients

• Intravenous conjugated estrogen: 25 mg every 4-6 hours for up to 24 hours (bleeding typically stops within 8 hours) 8
• Red blood cell transfusion: 10 mL/kg if hemoglobin <7 g/dL or symptomatic 9
• Intravenous tranexamic acid: If oral therapy not feasible 1

Bridging and Stabilization Phase

After acute bleeding control (typically 24-72 hours), transition to a bridging regimen to prevent recurrence while allowing hematologic recovery 10:

• Continuous combined hormonal contraceptives (skip placebo pills) for 1-3 months
• Depot medroxyprogesterone acetate (DMPA) 150 mg IM - provides 3 months of amenorrhea in most patients 4
• Oral progestins (norethindrone 5-10 mg daily) continuously
• Continue tranexamic acid during any breakthrough bleeding episodes 10

Iron Repletion

Critical component often overlooked 3:

• Oral iron: Ferrous sulfate 325 mg (65 mg elemental iron) 2-3 times daily on empty stomach
• Intravenous iron: Consider if hemoglobin <10 g/dL, oral iron not tolerated, or need rapid repletion before surgery 3
• Recheck hemoglobin and ferritin in 4-6 weeks

Long-Term Maintenance

Once stabilized and anemia corrected, transition to definitive therapy 10:

1. Levonorgestrel-releasing IUD (52 mg): Most effective long-term option, reduces bleeding by 90%, but should NOT be inserted during acute bleeding - wait until controlled 8, 10

2. Combined hormonal contraceptives: Continuous or cyclic regimens 8

3. Oral progestins: Norethindrone 5 mg daily continuously 8

4. Tranexamic acid: 1300 mg three times daily during menses only (non-hormonal option) 8

Evaluation for Structural Causes

Transvaginal ultrasound should be performed once acute bleeding controlled to assess for 11:

• Fibroids (leiomyomas)
• Polyps
• Adenomyosis
• Endometrial thickness

If ultrasound inadequate or concerning findings, MRI with diffusion-weighted imaging provides superior tissue characterization 11.

Endometrial biopsy indicated if 5:

• Age >45 years
• Risk factors for endometrial cancer (obesity, diabetes, PCOS, unopposed estrogen)
• Failed medical management
• Persistent irregular bleeding

Critical Pitfalls to Avoid

1. Don't delay hemoglobin assessment - dizziness with heavy menses is anemia until proven otherwise
2. Don't miss bleeding disorders - 20% prevalence in HMB, often undiagnosed for years causing significant morbidity 7, 12
3. Don't insert IUD during acute bleeding - this is a maintenance therapy, not acute management 10
4. Don't forget iron replacement - treating bleeding without repleting iron stores leads to persistent symptoms 3
5. Don't assume hormonal contraception is contraindicated - even in women with prior VTE, progestin-only methods may be appropriate with hematology consultation 2

When to Refer

• Hematology: If bleeding disorder suspected or confirmed, or if on anticoagulation 2, 1
• Gynecology: If hemodynamically unstable despite medical therapy, structural abnormalities requiring intervention, or failed medical management 2
• Emergency department: If orthostatic hypotension, hemoglobin <7 g/dL, or ongoing heavy bleeding despite initial therapy 1