The aim of the current study was to investigate the protective effect of naringin on bleomycin-induced pulmonary fibrosis in rats.\nTwenty-fourWistar rats randomly divided into four groups (control, bleomycin alone, bleomycin + naringin 40, and bleomycin +\nnaringin 80) were used. Rats were administered a single dose of bleomycin (5mg/kg; via the tracheal cannula) alone or followed\nby either naringin 40mg/kg (orally) or naringin 80mg/kg (orally) or water (1 mL, orally) for 14 days. Rats and lung tissue were\nweighed to determine the lung index. TNF-
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