Ritalin (methylphenidate) stays in your system for 4 hours, while Concerta (methylphenidate ER) stays in your system for 12 hours.
Acoording to: http://www.ipassedmydrugtest.com/drug_detection_times.asp Ritalin (Methylphenidate) is 1-2 days.
There are no substances that will increase the excretion of this from the body.
Methadate, or methylphenidate, typically stays in your system for 1-2 days. However, this can vary depending on factors such as metabolism, dosage, and frequency of use.
how long does codeine stay in system
Not as long as it will stay in short fine hair, but it will stay for awhile.
forever
72 hours
why
72 hours
1day
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.
As soon as your body has absorbs it which is not long