Erizol is the trade name and the generic name is Roxastat Capsules, which is clinically used for the treatment of renal anemia, and the dosage needs to be adjusted according to the change of hemoglobin, as follows. Choose the starting dose according to body weight: 100 mg per oral dose for patients weighing 45-60 kg, 120 mg per dose if the weight exceeds 60 kg. Hemoglobin needs to be monitored once every 4 weeks, and the dosage of roxarestat is adjusted according to the level of hemoglobin, which is maintained between 100 and 120 g/l. If it exceeds 130 g/l, the drug needs to be suspended, hemoglobin is monitored, and dosing is resumed if it is less than 120 g/l. Adjustment of the drug Roxarestat is complicated, do not change the dosage of the drug yourself, go to the hospital and adjust the dosage according to the level of hemoglobin under the supervision of a doctor. The use of the drug may cause such adverse reactions as bloating, dyspepsia, it is contraindicated in pregnant and breastfeeding women, in persons with a known allergy to the active components of the product or any excipients.