How long does 36mg of Concerta er stay in an adults system?

Concerta (methylphenidate) has a half-life of approximately 3.5 hours to 4 hours in adults. This means that it takes about this time for the body to eliminate half of the dose. Generally, it can take about 24 hours for the drug to be mostly cleared from the system, although traces may remain longer. Individual factors like metabolism, age, and overall health can influence this duration.