I see two perspectives on this. You're gonna learn this in pharmacy school anyway, so technically if they don't require it, you really shouldn't have to worry about it. One main thing to look at is the money. If it's costing you extra money to take the class, then I don't know. Some schools have a flat rate per semester, regardless of the number of credits.
However, physiology is so vital. I've heard people call much of the pharmacy field "applied physiology." And in order to understand physiology, you need to understand anatomy. I'm taking physiology right now and I love it. I hope that this helps me next year in pharm school. If you're able to take it, you should definitely take both. Make sure you take anatomy before physiology though. It'll definitely help you out in pharmacy school.