Truly, I would worry that a lot more than ADHD is going on. Smelling gasoline, for instance, can be autistic spectrum disorder. Talk of killing oneself can be early onset bipolar. The worse part is that stimulants can make a wrongly diagnosed kid even worse. I highly recommend taking him for a complete evaluation at a NeuroPsychs. They are psycologists too, but have extra training in the brain and they will test him on every level. My son had twelve hours of testing, in two hour increments, and we received outstanding results and it was the beginning of understanding and helping my son the right way. Personally, from what I've learned, I wouldn't medicate my son AT ALL until he had a neuropsychologist exam plus a second opinion, since the wrong medications are worse than no medications. Welcome to the board!