Final answer:
Certain medications and legal substances can cause false positives in urine drug-screen amphetamine immunoassays, including bupropion, pseudoephedrine, and some antidepressants.
Step-by-step explanation:
Other drugs that can cause false positives in commercial urine drug-screen amphetamine immunoassays include certain prescription medications, over-the-counter drugs, and even some legal substances. For example, bupropion, pseudoephedrine, and certain types of antidepressants (like tricyclic antidepressants) have been known to cause false positives for amphetamines. Additionally, substances such as labetalol, an anti-hypertensive, and the decongestant phenylephrine can also result in a false positive test result. It is crucial for individuals undergoing drug screening to inform the testing facility of any medications or supplements they are taking to help interpret the results accurately.