yes
no, but it will cause a positive result for opiates (heroin).
Hepatitis C infection does not directly cause a positive result for cocaine in a hair strand test. However, it's possible for someone with hepatitis C to also use cocaine, which could lead to a positive result. Each substance is detected separately in hair tests.
There is one prescription medication that can. Topical cocaine-hydrochloride. It is an anesthetic used mainly in eye surgery.
No.
No.
No.
no.
No it should not.
There is pretty much nothing that would cause a false positive for cocaine. Good luck.
yes
There are few things that can cause a positive cocaine test the most common is quinine so if you are partial to a gin and tonic this could cause a positive test.
No.