Get emergency professional medical enable When you have indications of an allergic reaction to methylphenidate: hives; problem respiratory; swelling of the face, lips, tongue, or throat.Li?u dùng có th? s? thay ??i tùy theo m?c ?? ti?n tri?n c?a b?nh, và th? tr?ng c?a ng??i b?nh.C?n ph?i th?t th?n tr?ng khi mu?n s? d?ng cho ng??i b?nh tr? em d?