comparision of the efficacy of nebulized l-epinephrine, salbutamoland normal saline in acute bronchiolitis: a randomized clinical trial

abstract background: acute bronchiolitis is the most common form of lower respiratory tract infection in infancy. there are numerous contradictory reports regarding the efficacy of nebulized bronchodilators in the management of infants with acute bronchiolitis. this study was designed to compare the efficacy of nebulized epinephrine with salbutamol for treatment of the disease. methods: in a randomized clinical trial, 72 infants with moderately severe bronchiolitis were enrolled in three equal groups. three doses of epinephrine, salbutamol, and normal saline as a placebo nebulized with oxygen were given at 20 minute intervals. oxygen saturation, respiratory rate and distress were recorded before intervention and i0 minutes after each dose of the drugs. results: at the end of the study, pre- and post-treatment mean oxygen saturation values, clinical scores and respiratory rates showed significant differences between the epinephrine and salbutamol groups in comparison with the placebo group. the results were more significant in the epinephrine group than other groups. after the treatment course 66%, 50%, and 25% of patients in epinephrine, salbutamol, and placebo groups respectively showed significant improvement at a degree that they could be sent home. no serious side effects were observed. conclusion: both nebulized epinephrine and salbutamol improved oxygenation and decreased respiratory distress better than normal saline. l-epinephrim was more effective in relieving respiratory distress and improving oxygen saturation as well as the need for hospitalization than nebulized salbutamol.