Pharmacology is an essential course that contributes basic theory, elementary knowledge and scientific principals to diseases prevention and rational use of drug. It is also a double bridge that links medicine and pharmacy, basic medicine and clinical medicine. The scope of pharmacology involves function sciences (physiology, pathology, biochemistry and molecular biology), morphology (human anatomy, embryology, parasitology) and clinic (internal medicine, surgery, gynecology, pediatrics) and many other disciplines. Pharmacology is characterized by wide range of contents and profound theories, making it an indispensable course for medical and pharmaceutical research as well as clinical and production practice. The goal of pharmacology includes: 1) to clarify the action of drug and underlying mechanism, support rational use of drug, maximization of drug effect and avoidance from adverse effect; 2) to develop new drug and novel purpose of existing drug; 3) to provide supports and methods for other life science researches.