Best instrument to swot up brand signature drugs and their generic equivilants?

I'm looking for a Wev site, or book even, that lists commonly sold drugs contained by retail pharmacies along withtheir generic equivilants, active ingredients, uses, and side effects. I own checked common sites, such as WebMD, but can't find exactly what I'm looking for.

Any facilitate would be apprechiated!
Thanks!

Answer:
www.drugs.com

I use it as a reference adjectives the time.