Information on acute overdosage with Cilostazol in humans is limited. The signs and symptoms of an acute overdose can be anticipated to be those excessive pharmacologic effect: severe headache, diarrhea, hypotension, tachycardia, and possibly cardiac arrhythmias. The patient should be carefully observed and given supportive treatment. Since cilostazol is highly protein-bound, it is unlikely that it can be efficiently removed by hemodialysis or peritoneal dialysis. The oral LD50 of cilostazol is greater than 5 g per kg in mice and rats and greater than 2 g per kg in dogs.