Brain... Tooth? That sounds less like a serious side effect of a drug and more like an SCP.
Besides, at least in America, they have to relay every single possible side effect ever encountered, even if the evidence linking it to the drug in question is sketchy. If some dumbass in Bolivia takes 20 of the thing and downs it all with a keg of vodka, then does cocaine to top it all off, and he gets a tooth in his brain, that's a side effect for all those things. If cocaine was legally sold, it would have to list: WARNING, DOING COCAINE MAY CAUSE YOUR LEFT FRONT CANINE TO LODGE ITSELF INTO YOUR CRANIUM. ALSO CAUSES RAMPANT STUPIDITY AND TWITCHYNESS. DO NOT USE IF YOU ARE ADD, ADHD, OR ADHDHADHDHADDDHADHDHADHDD.
I doubt it's going to do anything, to the point where the chance is so small it's probably safe to say that the drug in question is 100% safe, as long as we aren't doing rocket science. Unfortunately Legal science has to be even more precise than the Large Hadron Collider.
Does it say something about having a queasy stomach? You'll probably get that before anything really bad; the body is fairly good at going "wait, this is hurting me".
http://rayfish.com/
Grow your own pair of shoes, genetically!
This is... whut.
They're genetically engineering stingrays for shoes now? The 1950's scifi community would be pleased.