Is there an antihistimine that is safe to take and will not give you a dirty urine test, a false positive that benadrl can sometimes do?

Urine drug test . Benadryl (diphenhydramine) may cause a false positive drug test to Methadone in screening urine drug test but there are no reports of Claritin / zyrtec / allergra being a problem. However, Claritin d, zyrtec d, allergra d may cause positive drug test to amphetamine since they contain pseudonephrine.