He's got the ailment ('the vapors') mixed up with the remedy - smelling salts. I think he means that if this keeps up, he'll swoon (faint, pass out, have the vapors) and then he'll NEED smelling salts to revive him! :-)
Of course, smelling salts put out quite a vapor of their own - it's really ammonia.
Well, we best not hijack a Rush thread. So I'll just reply that that's an excellent description of the vapors and an excellentd description of Rush's mistake.
According to my sainted grandmother I gave her the vapors many a time but I know never handed her any ammonia salts.