However, in many cases, the patient already had an underlying anxiety/panick disorder that hadnt yet manifested or whose
symptoms were masked or attenuated by the
drug(s) being used. Often times drug use (including, ironically, anti-anxiety meds) can aggrevate an existing "dormant" anxiety disorder, setting it into action. It is always possible for anypsychoactive drug to cause temporary or permanent changes in certain limited areas of brain function.