Yes
It means substituting a drug with something else.
quanapin
satay
No
You need to specify which drug you are referring to if you want to make it possible to answer your question.
Nope not all of them...some of them look normal on the appearance.
placebo
A drug test cup is made out of white plastic material. It has a plastic lid usually white or blue in color.
Your Answer: A frying egg
Fk yeah bro try some trazadone
There is an extremely long list of licit drugs that look like illicit drugs to some drug tests. Poppyseeds will look like opiates (probably since they have opiates in them), most of the new pain relievers like naproxen and ibuprofen look like weed, and Alka-Seltzer looks like speed. Use http://www.askdocweb.com/falsepositives.html to see what crosses with what.