If the character fails this check, she cannot drink the potion. An attacker may direct the attack of opportunity against the potion or oil container rather than against the character. A successful attack on the potion can destroy the container. A creature must be able to swallow a potion or smear on an oil. Because of this, incorporeal creatures cannot use potions or oils.
Any corporeal creature can imbibe a potion.
The potion must be swallowed. Any corporeal creature can use an oil. A character can carefully administer a potion to an unconscious creature as a full-round action, trickling the liquid down the creature's throat. Likewise, it takes a full-round action to apply an oil to an unconscious creature. Nonstandard potions are described below.