It is possible to test for the presence of ketamine metabolites in urine, blood, & hair, but it is an uncommon test to do. In the last couple years ketamine has become more widely known in the popular media and some testing companies have added it to their "Club Drug" testing battery. Unless there is a particular reason to be looking for it, as in the case of an autopsy, specific ketamine tests are not normally conducted. It is not one of the NIDA-5 standardly tested for in the basic drug test, nor is it included in the extended drug tests.
If testing for ketamine is specifically requested, according to
Ketamine: Dreams and Realities, norketamine, the breakdown product of ketamine, is detectable in both blood and urine for 7-14 days and possibly longer in heavy users.
Ketamine may cause false positives for PCP on some drug screens (
1), but is clearly differentiable using follow-up confirming tests such as GC/MS. This is of less interest now that Ketamine itself is also illegal.
