Mushroom poisoning from the genus Amanita is a medical emergency, with Aman
ita phalloides being the most common species. The typical symptoms of nause
a, vomiting, abdominal pain, and diarrhea are nonspecific and can be mistak
en for gastroenteritis. If not adequately treated, hepatic and renal failur
e may ensue within several days of ingestion. In this case series, patients
poisoned with Amanita virosa are described with a spectrum of clinical pre
sentations and outcomes ranging from complete recovery to fulminant. hepati
c failure. Although there are no controlled clinical trials, a few anecdota
l studies provide the basis for regimens recommended to treat Amanita poiso
ning. Use of i.v. penicillin G is supported by most reports. Silibinin, alt
hough preferred over penicillin, is not easily available in the United Stat
es. In those with acute liver failure, liver transplantation can be life sa
ving. (C) 2001 by Am. Coll. of Gastroenterology.