7 days ?
Acoording to: http://www.ipassedmydrugtest.com/drug_detection_times.asp Ritalin (Methylphenidate) is 1-2 days.
how long is a prescription for blood work good in New York State
There are dates on the prescription paper and on the prescription container that will tell a person how long their prescription can be used. This varies from weeks to a year.
One year
Ritalin can be detected for 1-5 days in urine, but it is not part of the SAMHSA/ NIDA-5 standard drug test. Also Ritalin can cause false positives for methamphetamine/ amphetamines. If you have a prescription for it, notify them before the test. Or if test came up positive and you did not use meth, you should insist on additional GC/MS testing.
2 months
A Maryland drivers license is good for 5 years
As long as you take the prescription to your Probation officer then no they cannot lock you up for it. But if you do not tell them or take it to them and you test dirty they will arrest you until they can figure out why you tested dirty.
90 days
Ritalin will typically stay in your urine for a month. Urine tests are sensitive enough to detect urine long after the last consumption.
1-2days
I don't think ritalin affects urine. I take ritalin for ADHD aand i'm pretty sure it has to relationship with pee.