Can a lycanthrope really manage to drink a potion in werewhatever form? Wouldn't it be extremely difficult for their massive claws to delicately handle a potion? Where would they store them in battle?

It's hard to say exactly how strong a potion bottle is, really. You can hit a man in the head with a beer bottle and it won't break. And while the idea of a slavering were-wolf sipping delicately from a potion bottle, little finger extended, is amusing to me, it could just as easily bite the thing in two.