How clinical to apply drugs reasonably, reduces the side effect as far as possible, maximum limit displays the medicine the clinical curative effect, guaranteed that patient's medication is safe and is reasonable. Now has received more and more takes seriously, clinical pharmacy's importance also more and more appears. This article through goes to the armor eternal mildew element reasonable medication situation, clinician to the hydrochloric acid to go to the armor eternal mildew element related knowledge understanding to the hydrochloric acid the investigation, after and the pharmacist and clinician communicates and the instruction situation analysis effectively, explained that the development clinical pharmacy the importance, the promotion will do the clinical pharmacy work gradually from now on.