Because it is stronger than caffeine but not as strong as amphetamines, methylphenidate can be abused by those who take it recreationally (usually by snorting it or injecting it into a vein). Students have been known to use methylphenidate to stay up late to study for exams. It is a practice that can lead to addiction, a problem which often requires treatment at a drug rehabilitation center.
Excretion of Methylphenidate
The length of time that methylphenidate is detectable in the body is dependent on several variables, including which type of drug test is being used and which formulation of the drug is being taken. There are both immediate-release and extended-release forms of methylphenidate on the market, the latter of which remains in the body longer. Both are excreted primarily in urine. Methylphenidate has a relatively short half-life (1 to 4 hours) and doesn’t have the tendency to accumulate in cells the way that some other drugs do. However, elimination is highly variable, with some people excreting 97% of the drug over 1 to 2 days while others excrete as little as 78% over the same time frame. The causes of these variations may include a person’s metabolism, age, health status, and kidney function. As such, it is nearly impossible to determine the exact time by which methylphenidate will no longer register a negative result on a drug screen.
Other Reasons for Drug Testing
Blood-based screens are not commonly used in cases for recreational drug use because of the speed by which methylphenidate is excreted from the body. If abuse is suspected, a urine or saliva test can confirm current use (as well as estimate drug levels in the body) while a hair follicle sample can offer evidence of recent use.
Blood-based screen: not commonly used for drug screeningHair-based analysis: detectable in follicles for up to 90 daysSaliva-based screen: one to three daysUrine-based screen: one to three days
Blood-based tests are mainly used to determine if a person taking the drug for medical reasons is being prescribed the proper dosage. 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. Based on the findings, a doctor can decide if the dosage needs adjusting to achieve the desired therapeutic effect.
