Abstract: Objective To explore the Methods and significance of providing pharmaceutical care for patients with severe pulmonary infection by clinical pharmacist. Methods By participating in drug therapy for a case of severe pulmonary infection, clinical pharmacist provided pharmaceutical care such as selection of antimicrobial agents, optimization of individualizing dosage regimens, prevention of adverse drug reaction for patients. Results The clinical symptoms were relieved and disappeared gradually after anti-infection treatment. The body temperature returned to normal. Routine blood test showed normal white blood cell count and ratio of neutrophile granulocyte. Conclusion Clinical pharmacist can help the physicians to make effective and reasonable dosage regime as well as providing pharmaceutical service for patients with severe pulmonary infection with his professional knowledge.

Key words: clinical pharmacist, severe pulmonary infection, pharmaceutical care, rational drug use, adverse drug reaction