North American Journal of Medical Sciences

ORIGINAL ARTICLE
Year
: 2011  |  Volume : 3  |  Issue : 1  |  Page : 48--54

Comparative effects of Rauwolfia vomitoria and chlorpromazine on social behaviour and pain


Sunday Bisong1, Richard Brown2, Eme Osim1 
1 Department of Physiology, University of Calabar, Calabar, Nigeria
2 Department of Psychology and Neuroscience, Dalhousie University, Halifax NS, Canada

Correspondence Address:
Sunday Bisong
Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar P.M.B. 1115
Nigeria

Background : Rauwolfia vomitoria has been used in Nigeria to manage psychiatric disorders despite orthodox medicine. Aims : This research was therefore aimed at comparing the effects of R. vomitoria, chlorpromazine and reserpine on social behaviour and pain in mice. Materials and Methods : Ninety male CD-1 mice (32 - 38g body weight) were grouped into 3 with 5 subgroups (n=6) each. Mice were given chlorpromazine (0.0, 0.25, 1.0, 2.0, 4.0 mg/kg i.p.), 30 minutes before testing and R. vomitoria (0.0, 0.25, 1.0, 2.0, 4.0 mg/kg, i.p.) and reserpine (0.0, 0.1, 0.4, 0.8, 1.6 mg/kg, i.p) 24 hours before testing. Nesting score assessed social behaviour while the tail flick and hot plate analgesiometers assessed pain. Results : Chlorpromazine dose-dependently decreased nesting score (F 4,25 = 5.5660; p< 0.01), indicating decreased social behaviour (social loss) in the mice. Although R. vomitoria did not affect nesting score, reserpine decreased the nesting score (social loss). In the pain test, chlorpromazine did not alter tail flick latency but decreased hind paw lick latency in the hot plate at 2.0 and 4.0 mg/kg (p< 0.01), indicating increased pain sensitivity at these doses which may indirectly increase social withdrawal and thus aggravating depression. R. vomitoria however, increased tail flick and hind paw lick latencies in the hot plate test (p< 0.05) indicating decreased pain sensitivity. Reserpine, like R. vomitoria, increased latency of hind paw lick in the hot plate. Conclusion : R. vomitoria has a high potential as an antipsychotic and may have advantage over chlorpromazine; it is not necessary to isolate active components from this herb.


How to cite this article:
Bisong S, Brown R, Osim E. Comparative effects of Rauwolfia vomitoria and chlorpromazine on social behaviour and pain.North Am J Med Sci 2011;3:48-54


How to cite this URL:
Bisong S, Brown R, Osim E. Comparative effects of Rauwolfia vomitoria and chlorpromazine on social behaviour and pain. North Am J Med Sci [serial online] 2011 [cited 2022 Jun 25 ];3:48-54
Available from: https://www.najms.org/article.asp?issn=1947-2714;year=2011;volume=3;issue=1;spage=48;epage=54;aulast=Bisong;type=0