While taking Concerta, which is a methylphenidate, do your eye pupils restrict, or dilate?

While taking Concerta, which from what I understand is a methylphenidate, do your eye pupils restrict, or dilate? Does Concerta deed on the sympathetic, or para-sympathetic nervous system, and what spontaneous effect should be expected?


Answers:    CONCERTA(R) is a central easily upset system (CNS) stimulant. I have no impression about the sympathetic or para-sympathetic element.

I believe my son's eyes did dilate while he took this. He doesn't anymore, didn't like how it give him horrible headaches.

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