Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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What is the primary action of norpace (disopyramide phosphate)?

Anti-hypertensive
Anti-arrythmatic
Antibiotic
Anti-inflammatory

The correct answer is: Anti-arrythmatic

Norpace, or disopyramide phosphate, is primarily classified as an anti-arrhythmic medication. It is used in the treatment of various types of ventricular and supraventricular arrhythmias, helping to restore normal heart rhythm and improve cardiac function. Disopyramide works by blocking sodium channels in the cardiac tissue, which stabilizes the cardiac membrane and reduces the ectopic pacemaker activity that can lead to irregular heartbeats. This action makes it particularly valuable in managing conditions where abnormal heart rhythms are present, allowing for better cardiovascular stability and reducing the risk of associated complications such as stroke or heart failure. Unlike the other options provided, disopyramide does not have effects related to hypertension management, bacterial infection treatment, or inflammatory responses, which are characteristic of the other categories mentioned.