It should be considered an emergency if a patient develops acute onset anisocoria.

The early, acute onset took five minutes, and the effect could last for 120 minutes or longer.

However, acute onset of the condition has also been reported as well as episodic aphasia.

With acute onset, some individuals remember the exact time and place of their first experience of depersonalization.

It must always be considered in those with acute onset of shortness of breath owing to its high risk of mortality.