Analgesic, anthelmintic and toxicity studies of Solanum violaceum Linn. Leaves

[摘要] The methanolic extract of Solanum violaceum L. (Solanaceae), commonly known as Indian Nightshade, has been subjected to analgesic, anthelmintic and acute toxicity studies. Acute toxicity was examined for a period of seven days at doses of 2.0 g/kg (i.p.) and 5.0 g/kg (p.o.) in mice. Analgesic activity (250 and 500 mg/kg, p.o.) was assessed following acetic acid- and hot plate-induced pain on mice model. Live parasites Paramphistomum cervi Z. (Paramphistomatidae) and Haemonchus contortus R. (Trichostrongylidae) were used to evaluate anthelmintic activity at concentrations of 25, 50, 100 and 200 mg/mL. The extract showed no toxicity sign at both of the doses. In analgesic tests, extract inhibited 26 % and 58 % abdominal constriction at doses of 250 and 500 mg/kg, respectively, and significantly (P < 0.01) raised pain threshold at both doses. Fastest paralysis occurred in both species of helminths at higher concentrations (100 and 200 mg/mL). The relative index values for paralysis in H. contortus were 1.69, 1.04, 0.57 and 0.31 at the used concentrations mention above. The relative index of death in H. contortus suggested that S. violaceum is parasiticidal at high concentration. Likewise, relative indexes for paralysis and death in P. cervi proposed that S. violaceum is strong parasiticidal agent and comparable with albendazole. These results corroborate the traditional uses of S. violaceum in analgesia and helminthiasis and explain it on scientific grounds.

[学科分类] 药学

[关键词] Solanum violaceum