Lidocaine

Definition

Lidocaine is a local anesthetic and antiarrhythmic drug used to treat ventricular dysrhythmias. It works by blocking sodium channels, thereby stabilizing the cardiac cell membrane.

5 Must Know Facts For Your Next Test

1. Lidocaine is classified as a Class IB antiarrhythmic drug.
2. It is primarily used in emergency settings for ventricular arrhythmias such as ventricular tachycardia and ventricular fibrillation.
3. Lidocaine has a rapid onset of action but its effects are short-lived, typically lasting about 10-20 minutes.
4. The drug can cause central nervous system side effects such as dizziness, confusion, and seizures at higher doses.
5. Lidocaine is often administered intravenously in emergency situations due to its rapid absorption and effectiveness.

Review Questions

• What class of antiarrhythmic drugs does Lidocaine belong to?
• Why is Lidocaine commonly used in emergency settings for cardiac patients?
• What are some potential central nervous system side effects of Lidocaine at higher doses?

Related terms

Sodium Channel Blockers:

A group of medications that inhibit the influx of sodium ions through cell membranes.

Ventricular Tachycardia:

A type of fast heart rate that originates from the ventricles.

Cardiac Emergency Drugs: Medications administered in acute situations to manage life-threatening cardiac conditions.