Hi
Here is a nice site for princeples of drug action:
http://www.elmhurst.edu/~chm/vchembook/650drugs.htmlI found another resorce for as a PPT presentation:
clinicalcenter.nih.gov/researchers/ training/principles/ppt/takimoto_slides_2002-2003.ppt
I guess you should contact the person to ask his permission to use it.
Hope I helped you
Guy