Swallowing something does not mean it’s a ‘consumable’. You can swallow tissues too. The purpose of swallowing unflavored tablets or capsules is to get it inside your stomach, without providing any enjoyment or benefit to your mouth or throat. That is why we don’t make a brocha on medicine. If oral medication has flavor and sweetener, it might indeed need a brocha (and a hechsher too.)
Salt is not eaten by itself, and if eaten by itself for health reasons (?) will indeed need a brocha – unless it is harmful. in which case it is not ‘supposed to be consumed.’
In any case, my point was just that the OP was so vague, that I failed to understand what he meant. I proposed a few possibilities.