Methylphenidate (Ritalin) can show false positives for amphetamine or methamphetamine (5 panel test) but Detection time in urine its 3-5 days
3 days
yes
Methylphenidate can be detected in urine for 2-4 days, but it is not tested for nor does it cause a positive result on a drug screen. It will not cause a false positive for any other drug. Methylphenidate CAN be tested for, but it requires a special test which is looking only for use of methylphenidate.
Drinking coca tea could lead to a false-positive result for cocaine
you shouldnt have to use a friends urine
no. while methylphenidate is a dopamine reuptake inhibitor like meth, it is not an amphetamine so it won't show up as anything.
urine test
Concerta is a form of ritallin better known as methylphenidate. A standard drug test usually tests for amphetamine (speed) and methylphenidate allows for a false positive to be read.
For employment screening they use a urine test.
Acoording to: http://www.ipassedmydrugtest.com/drug_detection_times.asp Ritalin (Methylphenidate) is 1-2 days.
Not legally.
Urine sample test.