My wife has recently developed anaphylactic shock reaction. She has had four severe reactions in the past 3 month. She requires an epi pen injection and hospitalization with each attack. She has been tested for allergies with none evident. Doctors have done all of the tests which come back ok. The doctors are baffled. Her blood pressure and heart are only slightly elevated during the attacks but she drifts in and out of consciousness. She says that she can hear people talking to her during the time she is unconsciousness but has difficulty responding. She is now booked to see an internal specialist. What is idiopathic anaphlaxis? With thanks bob