ABSTRACT Respiratory system is essential for every living being. In physiology respiratory systems defined as the process of taking oxygen from the external environment to the cells within and transporting carbon dioxide in the opposite direction. The regulation of blood cell composition whichiscompatibletomaintaincellularhomoeostasisistheconcernofrespiratory homoeostasis. Lung diseases are most common medical conditions in the world. Disease such as Asthma, chronic obstructive pulmonary disease, chronic bronchitis, etc. are some chronic disease which evolved from respiratory conditions. In order to treat COPD precisely, health care professionalsprescribeddrugssuchasalbuterol,levalbuterolandipratropium. Pharmacodynamics refers to the study of affect of drugs on organism. Levalbuterol is used to preventandtreatwheezingandshortnessofbreathcausedbybreathingproblems. Pharmacokinetics refers to the study of affect of organism on drugs. Levalbuterol works in the airways by opening breathing passages and relaxing muscles. It belongs to bronchodilators class of drugs. It is used effectively in order to reduce the impact of COPD. The drug is not suitable for children under 4 years as it has side effects such as unusual fast breathing, and worsening asthma. Respiratory systems is essential for human body as without it no living being can survive. There are several types of diseases which are associated with respiratory conditions and numeroustypesoftreatmentsanddrugshavebeendevelopedinordertocurethem appropriately.Besidethesedrugs,ventilationtherapiesgivesthemeanofrestoringgas composition artificially. An individual suffers from chronic respiratory conditions required immediate attention. It can evolves numerous other conditions which can affects the health of individual. Nurses and health care professionals needs to ensure that effective care and treatment has been provided to the individual. 1
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