All of these are possible during a cocaine overdose:
Arrhythmias (irregular heart rhythm).
Severe tachycardia (elevated heart rate).
Very high blood pressure.
Dangerously high body temperature.
Sweating.
Nausea.
Confusion.
Severe anxiety or agitation.
Psychosis.
Tremors.
Seizures.
Stroke.
The answer would be: Seizures or Cardiac dysrhythmia
( I would go with Cardiac dysrhythmia)