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Research Article

A 4-week oral toxicity study of an antiviral drug combination consisting of arbidol and acetaminophen in rats

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Pages 244-253 | Received 15 Jun 2009, Accepted 31 Aug 2009, Published online: 30 Apr 2010
 

Abstract

The antiviral drug combination consisting of arbidol and acetaminophen was investigated for its 4-week repeated oral administration in Sprague-Dawley rats. Groups of rats (10/sex in low-dose group, 15/sex in other three groups) were given at doses of 0, 200, 400, and 800 mg/kg/day. Clinical signs, mortality, body weight, food consumption, hematology, clinical biochemistry, macroscopic findings, organ weights, and histopathology were examined. The administration resulted in increased incidence of piloerection in most of the high-dose females and in some of the high-dose males and mid-dose females. Histopathological examinations revealed minor treatment-related change in the stomach of the high-dose animals. A decrease in body-weight gains and an increase in liver weight were observed in the mid- and high-dose groups. These treatment-related effects were reversible at the 2-week recovery period. A number of other clinical and pathological findings were not considered to be treatment related, since these changes occurred only in one sex were among the normal historical ranges, which were not supported by histopathological findings. Under the conditions of the present study, the no-observed-adverse-effect-level for 4-week oral administration to rats was considered 200 mg/kg/day, based on clinical observations, pathological findings, body-weight losses, and liver-weight changes.

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