B?nh nhân ung th? thì nên dùng thu?c tr??c nh?ng ??t hóa tr? ho?c x? tr? kho?ng 7 ??n 10 ngày ?? có th? h?n ch? ?nh h??ng suy gi?m ch?c n?ng c?a t?y x??ng, và ph?c h?i s? l??ng b?ch c?u.Methylphenidate did not result in any rise in tumors inside of a life time carcinogenicity research carried out in F344 rats; the highest dose utilised was