Can klonopen and seraquil mixed with otc cold meds cause u to fail a drug screen for meth?

No: Seroquel and Klonapen are drugs of the benzodiazepam family and are not related to Methamphetamine. Furthermore Confirmation of drug screens are determined by gas chromatography/ mass spectrometry which are.specific for each chemical structure. Vick nasal inhaler contains L-methamphetamine which may produce a false positive test if D/L isomers of Methamphetamine are not reported out.