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How long does it take for Concerta 18mg to kick in?

Medically reviewed by Last updated on Oct 24, 2022.

Official answer


The effects of Concerta should be felt within an hour, and maximum effects anywhere from 6 to 10 hours later.

Concerta tablets are an extended release formulation that only needs to be taken once a day. They are designed to release a small amount of the medicine immediately, as the outer layer of the tablet dissolves. The rest of the medicine is then released gradually from a special membrane inside the tablet over the rest of the day, giving effects that last for up to 12 hours.

Concerta tablets contain the active ingredient methylphenidate, a stimulant medicine, used to treat attention deficit hyperactivity disorder (ADHD) in children.

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