NCLEX RN Practice Question # 729

NCLEX Examination.

Practice Question # 729.

 

NCLEX Examination

 

 

Class IB antiarrhythmics

Class IB antiarrhythmics include mexiletine and lidocaine; the latter is used to treat acute ventricular arrhythmias.

Lidocaine is distributed widely throughout the body, including the brain. Lidocaine and mexiletine are moderately bound to plasma proteins. (Remember, only the portion of a drug that’s unbound can produce a response.) Class IB antiarrhythmics are metabolized in the liver and excreted in the urine. Mexiletine also is excreted in breast milk.

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