Pharmacology - What is the hardest part to get a grasp on before starting?

[MizMaverick]

I am starting pharm this Fall, and I was wondering if any of you had any troubles on a particular subject....or is there any thing that I should really go over before the class starts that was maybe tough to comprehend? ( FYI I have already seen the forum with the pharm flash cards) thanks!

[CNASuzy]

Read, read, and reread!!! Memorize, memorize, memorize!!!!