Hi, I took the CNA class and the pharmacology class together during summer school. It was doable. I got a B for Pharmacology, but that's not too bad since half the class dropped :/. Anyway, the two classes were doable. As mentioned, the CNA class is pretty basic stuff. You don't really have to do a lot of studying time it's all about being in class/clinicals. So, all your studying should be dedicated to Pharmacology. I actually took Pharmacology online so that worked well as far as my schedule with CNA. It's not soo bad. Good luck.