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| ICD9 = |
}}Vomiting (also called throwing up or emesis) is the forceful expulsion
of the contents of one's stomach through the mouth and sometimes the nose.
Vomiting may result from many causes, ranging from gastritis or poisoning
to brain tumors, or elevated intracranial pressure (ICP). The feeling that
one is about to vomit is called nausea. It usually precedes, but does not
always lead to vomiting. Antiemetics are sometimes necessary to suppress
nausea and vomiting, and, in severe cases where dehydration develops,
intravenous fluid may need to be administered to replace fluid volume.]]The
medical branch investigating vomiting, emetics and antiemetics is called
emetology.
Mechanism
Vomiting center
Vomiting is coordinated in the vomiting center in the lateral medullary
reticular formation in the pons. Receptors on the floor of the fourth
ventric
