Jo and Leigh,
Your best bet for learning about various medications, their benefits, indications, side effects, and contraindications is to do a search for that drug on any of the good pharmaceutical websites. You can find a list of them at diagKNOWsis.org in the Resource Library.
I'll add them here, although sometimes websites get edited out -- so if the following websites get removed, just check out the list at diagKNOWsis.org:
drugtalk.com is a "relative" of this website, healthboards.com
The National Institutes of Health has good information at: http://www.nlm.nih.gov/medlineplus/druginformation.html
or try rxlist.com
Good luck to you.