A Ritalin overdose could be extremely dangerous and
in many instances, could be life-threatening. The symptoms of a
Ritalin overdose may include but may not be limited to: abdominal cramps, aggressiveness, confusion, depression, diarrhea, fatigue, hallucinations, high fever, hallucinations, high or low blood pressure, irregular heartbeat, nausea, panic, rapid breathing, restlessness, vomiting, tremor, convulsions or coma.