The maximum total tissue concentration in epithelial lining fluid, alveolar macrophages, bronchial mucosa, tonsils and sinus tissue were 14.9±11.4 mg/ l, 318.1±231 mg/ l, 3.88±1.87 mg/ kg, 3.95±0.53 mg/ kg and 6.96±1.58 mg/ kg, respectively.