What percripion will make you test positive for meth?

Uh, having methamphetamine in your system!

But other sources say the following can also cause false positive results:

Desoxyephedrine, Desoxyn, Methedrine, Vicks Inhaler

(non-prescription drug), Selegiline, Benzphetamine

and Famprofazon, Dexedrine, Benzedrine, Adderal.