Sometimes, depending upon how much I know about how the substances are obtained. I have one dealer that I never test, as I did a few dozen times or so and it was what it was supposed to be. The Flakka is usually aPvP or another similar drug, mixed with stacker 2 type things and/or glucose. The ratio of drug vs dilution is actually pretty high, around 50-50 most of the time. The stuff I have is a little more than that, but it's really better that way. With all the crazed stories of this substance, imagine the hysteria of pure aPvP on the street. As this is the only street drug I do besides special occasions (prescribed Xanax, Ambien, Suboxone and use Kratom, so I don't partake in the illegal stuff but about once a week or so) I'm not really sure. The red monkeys my friend gets are legit though, as I used these a ton in high school and they are the same thing in my opinion, but no I haven't tested them as at $40 a pop I have no use for them when a gram of flocks are 5-10 dollars