Molecules 2010, 15(4), 2925-2934; doi:10.3390/molecules15042925
Article

Evaluation of the Antinociceptive Activity and Acute Oral Toxicity of Standardized Ethanolic Extract of the Rhizome of Curcuma xanthorrhiza Roxb

1 Centre for Drug Research, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia 2 School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800, Pulau Pinang, Malaysia
* Author to whom correspondence should be addressed.
Received: 16 January 2010; in revised form: 25 February 2010 / Accepted: 22 March 2010 / Published: 22 April 2010
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Abstract: Ethanolic extract of Curcuma xanthorrhiza was used to evaluate the analgesic and toxicity effects in vivo. The extract was standardized using GC-MS, which showed that 1 mg of Curcuma xanthorrhiza ethanolic extract contains 0.1238 mg of xanthorrhizol. The analgesic activity was studied in rats using three different models, namely the hot plate test, tail flick test and formalin-induced pain test. The acute oral toxicity was examined by the oral administration of standardized Curcuma xanthorrhiza ethanolic extract in mice at doses ranging from 300–5,000 mg/kg and observation for 14 days. Standardized Curcuma xanthorrhiza ethanolic extract did not show significant analgesic effect in the hot plate and tail flick tests. However, in the formalin-induced pain test, Curcuma xanthorrhiza ethanolic extract significantly (P < 0.05) suppressed the paw licking time of rats in both early and late phases at doses 200 and 400 mg/kg of the extract, respectively. In the acute oral toxicity study, Curcuma xanthorrhiza ethanolic extract did not show any toxic effects in mice at 5 g/kg. These experimental results suggest that the standardized Curcuma xanthorrhiza ethanolic extract showed peripheral and central antinociceptive activity associated with neurogenic pain as well as a relative absence of toxic effects which could compromise the medicinal use of this plant in folk medicine.
Keywords: analgesic; acute oral toxicity; Curcuma xanthorrhiza;peripheral; standardized

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MDPI and ACS Style

Devaraj, S.; Esfahani, A.S.; Ismail, S.; Ramanathan, S.; Yam, M.F. Evaluation of the Antinociceptive Activity and Acute Oral Toxicity of Standardized Ethanolic Extract of the Rhizome of Curcuma xanthorrhiza Roxb. Molecules 2010, 15, 2925-2934.

AMA Style

Devaraj S, Esfahani AS, Ismail S, Ramanathan S, Yam MF. Evaluation of the Antinociceptive Activity and Acute Oral Toxicity of Standardized Ethanolic Extract of the Rhizome of Curcuma xanthorrhiza Roxb. Molecules. 2010; 15(4):2925-2934.

Chicago/Turabian Style

Devaraj, Sutha; Esfahani, Azadeh Sabetghadam; Ismail, Sabariah; Ramanathan, Surash; Yam, Mun Fei. 2010. "Evaluation of the Antinociceptive Activity and Acute Oral Toxicity of Standardized Ethanolic Extract of the Rhizome of Curcuma xanthorrhiza Roxb." Molecules 15, no. 4: 2925-2934.

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