Abstract
The effect of environmental temperature on the toxicity of cyclizine, trimethobenzamide, and Aspirin were studied in mice. LD50s were compared at 30 degrees C (warm), 22 degrees C (normal), and 15 degrees C (cool). At 30 degrees C the toxicity of all three drugs increased, with that to aspirin being affected most. Cooling decreased the toxicity of cyclizine and had no significant effect on that of trimethobenzamide or Aspirin. These findings indicate that alterations in environmental temperature markedly affect drug toxicity. They emphasize that such alterations, and particularly increases in temperature, do not have to be particularly drastic, but that "mild' variations in the environment are effective in altering an animal's sensitivity to a drug.
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