PCP...
midrin
nighquil
A few things may have caused this. The first being prescription drugs used to treat ADD or ADHD like Adderall or ritalin. The second thing that may have cause a false positive could be any kind of OTC or prescription drug containing epinephrine or sudephederine. Theres a few other drugs that can cause false positives but I cant remember.
yes
dogs
Yes
Yes, there are some prescription drugs which can cause water retention. Some of those drugs are NSAIDS, steroids, and birth control pills which contain estrogen.
Sometimes the prescription drugs can cause just as much problems as the problem itself! You have to weigh it out!
Yes
If your DOCTOR is testing you for prescription drugs he could look for anything. He could look for penicillin if he wanted to.
aggrenox that's all i know though
Well this question is very broad, however there are so many different prescription drugs that the withdrawls could basically be anything.