Evaluation of Analgesic Activity of Some Polyherbal Extracts against Acetic Acid Induced Writhing in Experimental Animals

Abstract

Aloe vera contains salicylic acid which is an aspirin like compound with anti-inflammatory, analgesic and anti bacterial properties. Cannabis sativa is an annual herbaceous plant in the cannabaceae family. The aim of present study was to evaluate analgesic activity of that combination extract against acetic acid induced writhing in mice. All animals were divided into four groups of six mice each. Group I was treated as toxicant control to observe writhing and group II was pretreated with diclofenac sodium (100 mg/kg, i.p.) Group III and IV were pretreated with polyherbal leaves extract of Aloe vera and Cannabis sativa at two doses 100mg/kg and 200mg/kg p.o. respectively. Polyherbal extract  and Diclofenac sodium were given before 60 minute of acetic acid administration. The results showed that polyherbal extract significantly reduced number of writhing when compared with group I (Toxicant control) mice and the results were dose dependent. The toxicity study also revealed its safeness, thus the combination of plant extract can be hypothesized it is nontoxic. It is concluded that polyherbal extract can offer protection against acetic acid induced writhing in mice.