Students have been known to use methylphenidate to stay up late to study for exams.

To this end, blood will be drawn 1 to 2 hours after a dose is taken.

This allows time for the blood concentration levels to peak.

urine drug test and pill bottle in background

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U.S. National Library of Medicine.

Revised July 15, 2019.

Huang Y, Tsai M.Long-Term Outcomes with Medications for Attention-Deficit Hyperactivity Disorder.CNS Drugs.

2012;36(7):538-539. doi:10.1093/jat/bks056