My PCs will find in a body of a half-orc an unmarked bottle with a potion of healing. What if they think that this is a poison which drows often use in my campaign? They would pour the bottle on their swords.
Does a potion of healing have a different effect if applied on an open wound, such as when the PCs slice enemies with it?
The potion of healing's description states:
You regain hit points when you drink this potion.
I assume that using it differently it has no effect, but maybe there is some information about it deeper. If not, I can always improvise, but maybe it's better to let it be with no effect.
RAW, the effects only apply when it is consumed "per os". (Emphasis mine).