A good medicine cures patients, and a bad one doesn't, or even brings unfavorable by-effect. Of course, the effect of medicines depends on the applied dose. It depends, however, on the patients genetic properties, too. So we need the "tailor-made" drug treatment. In this lecture, the good and evil in drugs is considered from this viewpoint. Also the problems of medication errors are discussed, and some solutions are proposed.

NOTE:
- This lecture was conducted only in Japanese.