Table 1.

Causes of asterixis [1]

Bilateral asterixis	Unilateral asterixis
Metabolic: liver failure, azotemia, respiratory failure	Focal brain lesions at:
Drugs:	Thalamus
Sedatives: benzodiazepines, barbiturates	Corona radiata
Anticonvulsants: phenytoin (phenytoin flap), carbamazepine, valproic acid, gabapentin	Anterior cerebral artery territory
Antipsychotics: lithium	Primary motor cortex
Antibiotics: ceftazidime	Parietal lobe
Others: metoclopramide	Cerebellum
Dyselectrolytemia: hypomagnesemia, hypokalemia	Midbrain
Bilateral structural brain lesions	Pons