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Prochlorperazine
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Prochlorperazine : ウィキペディア英語版
Prochlorperazine

Prochlorperazine (Compazine, Stemzine, Buccastem, Stemetil, Phenotil) is a dopamine (D2) receptor antagonist that belongs to the phenothiazine class of antipsychotic agents that are used for the antiemetic treatment of nausea and vertigo. It is also a highly potent typical antipsychotic, 10–20× more potent than chlorpromazine. It is also used to treat migraine headaches. Intravenous administration can be used to treat status migrainosus.
== Indications ==

Prochlorperazine is a phenothiazine drug. Most drugs in this category are used as anti-psychotics (neuroleptics). Neuroleptic means "nerve seizing", and describes the semi-paralyzing effect these drugs have on the brain and nervous system. Stemetil is no longer being manufactured for sale in Canada as an anti-psychotic, but it is still available for treatment of nausea.
It is now relatively seldom used for the treatment of psychosis and the manic phase of bipolar disorder. It has a prominent antiemetic/antivertiginoic activity and is most often used for the (short-time) treatment of nausea and vomiting and vertigo as follows:
# To alleviate the symptoms of vertigo
# As an antiemetic, particularly for nausea and vomiting caused by chemotherapy, radiation therapy and in the pre- and postoperative setting
# In the UK, prochlorperazine maleate is available as Buccastem M in buccal form as an over-the-counter treatment for migraine. In this indication it blocks the chemoreceptor trigger zone (CTZ) in the brain, which is responsible for causing severe nausea and vomiting. Its over the counter (OTC) use is strictly restricted to a maximum of 2 days, because of the potentially severe side effects of prochlorperazine, which mandate supervision by a health care provider.
# In the UK prochlorperazine maleate has been prescribed to alleviate the symptoms of labyrinthitis, which include not only nausea and vertigo, but spatial and temporal 'jerking' and distortion

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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