Administration and study drug dosage
During the treatment periods for both treatment sequences, the dosing of the study drug is as follows: patients aged ≥ 13 years or aged 4–12 years weighing ≥ 35 kg will take 4 g/day (2 g in the morning, 1 g in the afternoon, and 1 g in the evening). Patients aged 4–12 years weighing 25 to < 35 kg will take 3 g/day (1 g in the morning, 1 g in the afternoon, and 1 g in the evening). Patients aged 4–12 years weighing 15 to < 25 kg will take 2 g/day (1 g in the morning and 1 g in the evening). Medication should be taken at least 30 min before or at least 2 h after a meal. Compliance will be assessed upon a review of the inventory of IB1001 sachets returned by patients.