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Year : 2016  |  Volume : 37  |  Issue : 3  |  Page : 256-263

Evaluation of antitussive and anti-asthmatic activity of Tabernaemontana divaricata(L.) R. Br. Ex Roem. and Schult

1 Department of Pharmacology, Truba Institute of Pharmacy, Bhopal, Madhya Pradesh, India
2 Department of Pharmacology, Moradabad Educational Trust Group of Institutions, Faculty of Pharmacy, Moradabad, Uttar Pradesh, India

Correspondence Address:
Dr. Amit Kumar Srivastava
Department of Pharmacology, Truba Institute of Pharmacy, Karond Gandhi Nagar, Bhopal - 462 038, Madhya Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ayu.AYU_35_16

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Background: The study was aimed to investigate the antitussive and anti-asthmatic activities of ethanolic extract of Tabernaemontana divaricata (TDEE) leaves byin vivo andin vitro models. Recently, indole alkaloids (monoterpenoid indole alkaloids) have been approved as investigational new drug for clinical trial in respiratory diseases, and T. divaricata has already proven its potential for the presence of indole alkaloids. Materials and Methods: Acute toxicity studies of TDEE were performed in accordance with the Organization for Economic Cooperation and Development guidelines no. 425. The sensitized guinea pigs were screened out and divided into control, standard, and TDEE-treated groups. Anti-asthmatic activity of TDEE was assessed byin vitro guinea pig tracheal chain method andin vivo bronchoprotective test method using aminophylline as a standard drug. Taken codeine as standard, antitussive activity was evaluated by in vivo citric acid-induced tussive response. Results: TDEE was found to be safe up to 2000 mg/kg, body weight. TDEE exhibits maximum bronchi relaxation of 91.66% and 92.83% against acetylcholine and histamine-induced contraction, respectively. TDEE exhibited maximum and significant (P < 0.001) bronchoprotection of 42.28% at the dose level of 200 mg/kg, body weight. TDEE at aerosolic dose of 6% (w/v) exhibited decreased average cough frequency (4.83 ± 0.30) which is quite significant (P < 0.001) and effective as compared to standard drug codeine. Based on the histopathological evidences, TDEE-treated groups showed reduced inflammatory cell infiltration and had restored epithelial damage. Conclusion: The results of the study revealed the potent antitussive and anti-asthmatic activities of T. divaricata, which support its further implication for the treatment of cough-associated complications such as cough variant asthma.

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