i Register
In some senses, epispastic is marked as archaic, dated. Watch for register when choosing this word.
adj
Causing blisters; vesicant.
Old Postle says this: "Cantharides when used internally are diuretic and stimulant; when applied externally they are epispastic and rubefacient." Now what the devil can he mean, eh?
noun
A vesicant agent; that which causes blisters.
A blister.