It should not cause a false positive on a drug test.
I'm not sure about phenylephrine, but if it does, their tests are poor. However, desoxyephedrine is methamphetamine, so of course it would make you test positive.
Yes. Codine is an ingredient in both phenylephrine and oxycodone. Oxycodone is an opiate.
you will test dirty for barbitutes.
Yes
No, antibiotics will not show or masck for benzoes.no interfearence.
Phenylephrine is a vasoconstricting agent.
YES! Search "phenylephrine and false positives"....you will get many websites listing many over the counter medications that can cause a positive drug screen. Phenylephrine, Dextromethorphan, & Guaifenesin...active ingredients in many cold remedies...will show positive for amphetamines
As little as 25 milliliters of marijuana can cause a dirty test.
can ampitriptyline give you a dirty urine
any cold pill that contains pseudophedrine hydrochloride
no i do not think so because in can make some cereberal effects .