A member asked:

I've noticed that concerta starts working only 2-4 hours after i take it, yet most people say that it takes around 45 min for them. is this unusual?

A doctor has provided 1 answer

Depends: Absorption of Concerta varies depending on a person's metabolism, presence of other medications and whether taken on an empty stomach or after a meal. You are in the normal range for Concerta to be absorbed into your system (bloodstream) so you feel it's working. Be sure to discuss any concerns with your prescribing doctor.

Answered 5/1/2016

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Is it advisable to take 8-hour concerta twice a day?

5 doctors weighed in across 2 answers