Legal over-the-counter medications that can cause you to fail drug test?

People don't realize there are a lot of things that can give a false positive on a drug test. ibuprofen can give a false positive for cannabis.Cold remedys can give a false positive for amphetamines,and decongestants ,like pertussive can give a false positive for opiates .Some of the newer antibiotics can give a false positive for cocaine! Valium can give a false positive for PCP. There are foods you eat which too can give false positives on drug tests. The most common one being poppy seeds which can give a false positive for opiates.