Just a few signs of a meth overdose are profuse sweating, dilated pupils, extemely high heartrate and fever. The more severe the signs, the more severe intoxication has progressed.
Signs of overdosing on meth, would be foaming at the mouth, a rapid heartrate, sweating uncontrollably, vomiting, and going in and out of consciousness. Any of these signs are dangerous.
Signs vary from person to person but some of the more common ones are these. Dilated pupils, convulsions, elevated heart rate and blood pressure, shock & coma.