Depending on your bodies metabolic rate, Methylphenidate will probably stay in your system 1-2 days as far as being detected by a urine analysis. For more info check http://health.rutgers.edu/drugs/DrugChart.htm.
Until you sweat it out or buy yourself a drug blocking kit from docter herman's or such.
Ritalin (methylphenidate) stays in your system for 4 hours, while Concerta (methylphenidate ER) stays in your system for 12 hours.
Methylphenidate
Acoording to: http://www.ipassedmydrugtest.com/drug_detection_times.asp Ritalin (Methylphenidate) is 1-2 days.
how long will it stay in my body
There are no substances that will increase the excretion of this from the body.
How long does oxalic acid stay in the body
how long does codeine stay in system
Not as long as it will stay in short fine hair, but it will stay for awhile.
1day
forever
72 hours
why
72 hours
Inositol, depending on the dosage, can stay in your body up to a month after you stop taking it. Symptoms can last that long also.