This book, in the context of the five Biological Laws, has been written with the intent to carry out a greater understanding on the origin and the meaning, from the biologic point of view, of the anxiety and the panic attack.The German New Medicine discovered by the Dr. Ryke Geerd Hamer and systematized in the five Biological Laws, it represents a change in the understanding of what is commonly called "Illness".Through his studies, Dr. R. G. Hamer, has reached the ascertainment that the pathological courses are not "errors of the nature" but, on the contrary, Sensible Biological Programs of the Nature consequent on sudden and dramatic events.