1) Not everything exists as a vapor at normal atmospheric pressure. Some things burn at this pressure before they vaporize.
2) Many things which are 'smoked' are not vaporized or burnt, they are 'attached' or carried by other substances in the smoke that have vaporized and/or burnt then are carried into the lungs and absorbed. This is why a lot of the people around here don't realize that certain substances (like plain cocaine...) can be smoked, with effect, AS LONG A THERE IS A CARRIER (like the tobacco in a cigarette). The particles are ''dissolved'' in the CARRIER's smoke, and carried with it, despite the fact that it doesn't vaporize at that temperature. This is a HIGHLY INEFFECTIVE way of getting something into the system, because only a very slight amount of a substance can be dissolved in a vapor, and the vapor has the tendency to 'drop' some of it as it moves. HOWEVER, it does work.
3) From personal experience, I am VERY confident in the belief that Lorazepam ('Ativan') can be smoked, with effects different from oral or sub-lingual... having done so, as the only means of administration, on numerous occasions, and then having experienced episodes of talking long naps and not remembering many hours upon waking up. If you have a bunch, why not just try. Whats it gonna do... kill you on the first toke?
Well... I guess it COULD, but such are the risks we take.