The following brief textbook presents a clear and accessible approach to the analysis of therapeutic agents at the cellular and molecular level through detailed diagrams, full-colour illustrations, and educational features. I use a lot of the illustrations and diagrams from this textbook throughout the lecture notes.
Neal MJ. Medical Pharmacology at a Glance. Wiley-Blackwell.
For more detail and explanation, the following is recommended:
Bryant B, Knights K. Pharmacology for Health Professionals. Mosby Elsevier.
This is a useful introductory text that summarises the key principles of pharmacology. It has an easy-to-use format with summary diagrams and explanatory notes.
You will also need regular access to your relevant clinical practice guidelines / protocols as follows:
Caffey, M. Paramedic and Emergency Pharmacology Guidelines. Pearson Australia