quinidine

quin·i·dine   (kwĭn'ĭ-dēn')    n.  A colorless crystalline alkaloid, C20H24N2O2, resembling quinine and used in treating malaria and certain heart disorders.

Main Entry: quin·i·dine
Pronunciation: 'kwin-&-"dEn, -d&n
Function: noun
: a crystalline dextrorotatory stereoisomer of quinine foundin some species of cinchona and used sometimes in place of quinine but chiefly in the form of its sulfate in the treatment of cardiac rhythm irregularities

quinidine quin·i·dine (kwĭn'ĭ-dēn')
n.
A colorless crystalline alkaloid that is a stereoisomer of quinine and is used as a treatment for malaria and cardiac arrhythmias.

quinidine

drug used in the treatment of abnormal heart rhythms (arrhythmia) and malaria. Obtained from the bark of the Cinchona tree, quinidine shares many of the pharmacological actions of quinine; i.e., both have antimalarial and fever-reducing activity. The main use of quinidine, however, involves its activity as a myocardial depressant-that is, it depresses the excitability and conduction velocity of nerve impulses and the contractility of the heart muscle. The drug also tends to lower blood pressure. Nausea, vomiting, diarrhea, and skin rash are common reactions to the use of quinidine.

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