In a one-year study with dogs given oral doses of 0, 0.25, 0.5, or 1 mg/kg/day, there were no changes in tissue at any dose level. Some dogs at the 0.5 and 1mg/kg/day levels showed nervous system effects leading to a NOEL of 0.25mg/kg/day. Similar results were observed in a two year study in rats with a few individuals in the high (2mg/kg/day)
group exhibiting effects. When mice were fed 8mg/kg/day (highest dose tested), for 94 weeks, the males developed dermatitis and changes in blood formation in the spleen, while females exhibited tremors and weight loss.
In a one-year study with dogs given oral doses of 0, 0.25, 0.5, or 1 mg/kg/day, there were no changes in tissue at any dose level. Some dogs at the 0.5 and 1mg/kg/day levels showed nervous system effects leading to a NOEL of 0.25mg/kg/day. Similar results were observed in a two year study in rats with a few individuals in the high (2mg/kg/day)group exhibiting effects. When mice were fed 8mg/kg/day (highest dose tested), for 94 weeks, the males developed dermatitis and changes in blood formation in the spleen, while females exhibited tremors and weight loss.
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