Before I give you my answer I'll say that every school handles each class differently so I can only give you my answer for my school. There are a lot of classes to be potentially terrified of in vet school, and pharm could be one of them, but it ended up being my favorite set of classes and is obviously extremely important to clinical practice. Don't let preconceived notions trip you up.
At AVC, they kind of did away with the biochem part of pharm and just focused on the practicalities: classes of drugs and their uses, essentially. We talk about mode of action and volume of distribution and all that jazz, but none of this Michaelis-Menton kinetics stuff. It had essentially nothing to do with my biochem class from undergrad.