Does anyone know if I can get an updated Drug listing off the net without purchase?

Here are some of the ones I use:

http://www.rxlist.com/

http://health.yahoo.com/health/pdr_drugs/r.html

http://www.cvs.com/CVSApp/cvs/gateway/rxhome

Also, I have an oncologist who is using new drugs as soon as they come out, and I go to the FDA site for those:

http://www.fda.gov/cder/approval/

It would be helpful also to have a drug book. The 2 I hear about most are Quick Look and Saunders. I like both. Saunders has some drugs that Quick Look doesn't, but Quick Look has an Indication/Therapeutic Category Index which comes in handy if you know what a drug is for but you can't quite hear it enough to figure it out by itself.