The present investigation was designed to evaluate the anti-asthmatic activity of ethanolic extract of Murraya Koenigii Leaves in experimental animals. Murraya Koenigii Leaves was evaluated for anti-histaminic activity using isolated Guinea pig tracheal chain preparation, histamine induced Bronchoconstriction in Guinea pig and milk induced leucocytosis in mice. Ethanolic extract of Murraya Koenigii Leaves oral dose 400mg/kg body weight significantly inhibited dose dependent contraction of
Guinea pig tracheal chain produced by histamine and also showed significant protection by prolonging PreConvulsion Dyspnoea time (PCT) in guinea pigs.
Murraya Koenigii Leaves was evaluated by milk induced leucocytosis in mice showed significant decreased of total leukocyte count. Thus, Murraya Koenigii Leaves showed anti-allergic activity against histamine hence possesses potential role in the treatment of asthma.
Keywords: Anti-asthmatic, Murraya Koenigii, Histamine aerosol, Chlorphenaramine Maleate.