Not everyone in Salem supported the witch trials. Wealthy farmer John Proctor sternly denounced the proceedings and warned against listening to the young girls.
Amphetamines - Substances or Conditions which can cause false positives. Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine (Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc) Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil Over-the-counter diet aids with phenylpropanolamine (Dexatrim, Accutrim)
Â· just now. Report Abuse. Diphenhydramine can trigger a false positive for TCA's. Source(s): Sorisky A, Watson DC. Positive diphenhydramine interference in the EMIT-st assay for tricyclic antidepressants in serum [letter]. Clin Chem.