Excretion Just after oral dosing of radiolabeled methylphenidate in human beings, about 90% on the radioactivity was recovered in urine. The main urinary metabolite was ritalinic acid, accounting for approximately 80% from the dose.Thymomodulin? là m?t d?ng h?n h?p nhi?u peptit và chi?t xu?t t? tuy?n ?c con Bê. Thu?c s? có tác d?ng ?i?u bi?n m