Is there a check by which a combatant can force-feed an unwilling target a potion?
The question stems from several magic items, including the Potion of Diminution and Potion of Poison. I am seeking to develop an expanded list of potions for the Unearthed Arcana Artificer class and the ability to affect an enemy with potions such as these would be grounds for a much higher spell slot to Infuse than if it was restricted to willing targets (or misled, in the case of Poison).
This question is specifically in reference to conscious opponents, enemies who can resist the attempt.
Best Answer
The only thing stopping you is the DM.
You might need to force it's mouth open, Strength vs Strength, or torture (oooooh evil acts!) to make it scream, or maybe even beat a Constitution check (gag reflex throwing the potion up) in order to make it drink.
But really your job is simple: describe what you want to do, roll against whatever the DM wants. If your DM is floundering, make your case as to why you're doing it, and what would make sense logically to you.
If you are the DM, go with whatever makes sense. There's no hard and fast rule on this, so it's going to be an improvised situation.
Oh, incidentally, there's no crafting table either. Which means when you craft your potions, consider the 3 methods of attack; Ingested, Contact and Inhaled.
Who's to say you can't turn that poison potion into a contact (attack roll to administer) or inhaled (Con save) version?