A 20-year-old woman is being treated for anemia (hemoglobin-72 g/L). A year and a half ago, she had an involuntary miscarriage with a significant blood loss at 16 weeks of pregnancy, after which the woman developed memory deterioration, fatigability, of appetite, dry skin, brittle nails, and irregular menstrual cycles. Objectively, the following is observed: blood pressure 80/55 mm Hg, pulse - 54/min., height - 168 cm, weight-48 kg, genital hypoplasia. What medicine would be the optimal choice for this patient?