Categories of medications included antihistamines ... and a nonprescription nasal inhaler. False-positive results for amphetamine and methamphetamine were the most commonly reported.

The search strategy was developed by a medical librarian combining the terms false positive results, urine, and substance abuse testing and the generic names of 116 medications. When possible ...

"Amphetamines ... and induce false feelings of power, strength, self-assertion and enhanced motivation. Trade names for amphetamines are Benzedrine, Dexedrene and Methedrine; these drugs have ...