“…AHPs are typically recognized by acute neurovisceral attacks ( Figure 2) with systemic and neuropsychiatric signs and symptoms (Table 1), including: (i) autonomic disturbances (i.e. gastrointestinal dysmotility, acute abdominal pain, fever, sweating disorders, tachycardia, cardiac arrhythmia, postural hypotension, or arterial hypertension); (ii) acute neuropathic involvement (i.e., acute motor axonal neuropathy; cranial neuropathy with involvement mainly of the third, sixth, ninth, and tenth cranial nerves; neuropathic pain and acute respiratory failure with diaphragmatic paresis); (iii) metabolic disturbances (i.e., mildly abnormal liver tests and hyponatremia due to syndrome of inappropriate antidiuretic hormone secretion); and (iv) acute neuropsychiatric disturbances or other central nervous system (CNS) involvement (i.e., acute encephalopathy, posterior reversible encephalopathy syndrome, seizures, status epilepticus, cerebral vasospasm and vasoconstriction, acute psychosis, and abnormal circadian rhythm with insomnia) 1,2,3,4,9,13,14,15,19,20,21 .…”