Don't worry about it; there are more sensitive tests that can positively distinguish between meth and prescription medication, so if you're taking something that happens to give a false positive just let them know and get retested with the more accurate test.
Us telling you what you could CLAIM to be taking ... sorry, not going to happen.
There is one prescription medication that can. Topical cocaine-hydrochloride. It is an anesthetic used mainly in eye surgery.
If you test positive fro a drug that you require on the recommendation of a doctor then that would explain why you are using as oposed to abusing a particular drug. You tell whomever it is that is ordering your drug test (not the lab) that you are taking prescription medication that will cause a positive result on your drug screen (assuming that the medication that you are on is actually one of the drugs tested for), and give him/her a copy of your prescription. Your doctor doesn't need to explain anything-that's what the prescription is for.
midrin
No.
nighquil
Yes, Atripla can cause a false positive for a high reading of cannibinoids.
PCP...
aderol poor mans coke
Prescription medication can only be obtained by visiting a doctor and getting a prescription. Just about all prescriptions have side effects of some sort.
Yes the doctor can do this if he/she feels the medication is no longer needed, or that it may cause a patient harm.
Probably any Opiate, Benzo medications, you get the idea.
It doesn't matter whether you receive samples or pay for the medication, if it is prescription medication, and if the cause of your needing medication is work related, then it is likely recordable. The devil is in the details, so always consult a expert in these matters.