Does efexor test positive as same as a benzinpine sp?

Possibly, yes!: False + urine drug tests for phencyclidine (PCP) or amphetamine are reported if you take Effexor (venlafaxine). It's due to lack of specificity in the test. It can persist several days after last dose. Confirmation via special tests can be done. Take your Rx w/ you! See: http://www.fda.gov/Safety/MedWatch/SafetyInformation/ucm201064.htm