The principles governing the use of pharmaceuticals are these: provided that the drug regimen is reducing symptoms, drugs should be administered in the lowest doses and in the fewest varieties possible, and should be reasonably effective in treating the condition. (That is, their side effects should not be such that they reduce the patient's quality of life.)
而用藥原則是：在有效減緩症狀的前提下，越輕的劑量越好，越單純的藥物越好，以及選擇對症狀有合理療效的藥物（即不能讓患者因為藥物的副作用而降低生活品質，例如整日昏昏沈沈、遲鈍呆滯、完全失去胃口，或是引發肝、腎毒性問題等。）