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The peak levels and half life of Ritalin depend on the formulation. But with the immediate release version of Ritalin, methylphenidate reaches peak levels in the blood in about 2 hours. And methylphenidate from Ritalin tablets is eliminated from plasma with an average half-life of about 3.5 hours. As a comparison, in children the average half-life of methylphenidate is about 2.5 hours, with a range of about 1.5 â 5.0 hours.
Responses (2) Hello Jillynnie. I can answer that for you. A half life is how long a drug, when taken, it takes your body to break down that drug, retain in in your body, and then leave your body. Some medications can stay in your blood system, often say a week. Another from the time thats its taken, might leave your body within the same day you took it.