Analgesic and anti-inflammatory effects of the methanol stem bark extract of Prosopis africana

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Abstract

Prosopis africana (Guill. & Perr.) Taub. (Mimosoideae) is a shrub used for menstrual and general body pain in Nupe land in north central Nigeria. In this study, the methanol extract of the stem bark of Prosopis africana (at doses of 62.5, 125, and 250mg/kg) was evaluated for analgesic and anti-inflammatory activities using acetic acid-induced writhing assay and carrageenan-induced inflammation in rats. The extract significantly (P <0.05) attenuated the acetic acid-induced writhing with the highest activity observed at the highest dose, 250mg/kg (76.89%) comparable to that of piroxicam (83.16%) the standard agent used. In the carrageenan-induced inflammation assay, the extract showed significant anti-inflammatory activity (P <0.001) from the third hour. The preliminary phytochemical screening revealed the presence of flavonoids, saponins, carbohydrates, cardiac glycosides, tannins, and alkaloids. The oral median lethal dose was found to be 3807.9mg/kg in mice and > 5000mg/kg in rats. This study supports the folkloric claim of the use of Prosopis africana in the management of pain. © 2010 Informa UK Ltd.

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Ayanwuyi, L. O., Yaro, A. H., & Abodunde, O. M. (2010). Analgesic and anti-inflammatory effects of the methanol stem bark extract of Prosopis africana. Pharmaceutical Biology, 48(3), 296–299. https://doi.org/10.3109/13880200903121006

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