Ph?i h?p trong ?i?u tr? nh?ng tr??ng h?p h? mi?n d?ch ho?t ??ng quá m?c: Patients with Renal Impairment Methylin has not been studied in in sufferers with renal impairment. Considering that renal clearance will not be a crucial route of methylphenidate clearance, renal impairment is predic