Yes, I would highly recommend taking current "higher" level chemistry and biology courses. My chemistry was a decade old and I had to get permission to take Organic Chemistry from the local university. For all of you with old chemistry and A & P courses, there was a piece of advice given to me by one program director: "Make sure you ace all current science courses prior to admission to a CRNA program.....these courses are looked upon as the most important coursework" He, also, recommended that if you feel uncomfortable with taking these science courses, find a community college that offers these. This will help you ace the courses! Mind you, this is not because chemistry and biology courses are easier in community colleges, it is the fact that the instructors are more accessible for tutoring and questions. It is important that if you do not like chemistry or biochemistry, you must reconsider your path of studies...or find a way to enjoy it!
In the CRNA program, it is known that, not only do you learn pharmacology...you learn it down to the cellular level.
p.s. Doug, you are doing the smart thing, indeed! I wish I fit in more, prior to my admission process!