A 42-year-old woman comes to the clinic with 3 months of fatigue and shortness of breath on climbing stairs. She has had 8-day menstrual periods with clots for the past year, and ultrasound previously showed a fibroid uterus. She has no abdominal pain, change in bowel habits, melena, or weight loss, takes no medications, is not pregnant, and eats a mixed diet. Examination shows conjunctival pallor and a normal abdominal examination. Laboratory results: hemoglobin 101 g/L (115-155), MCV 74 fL (80-100), ferritin 8 microg/L (15-200), total iron-binding capacity 85 micromol/L (45-80), transferrin saturation 0.10 (0.20-0.50).
| Heart rate | 88/min |
| Respiratory rate | 16/min |
| Temperature | 36.8 °C |
| O2 saturation | 99%, room air |
| Blood pressure | 118/72 mm Hg |
Question 1 of 12
Which one of the following is the most appropriate first-line therapy for her anemia?
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