Antiarrhythmic drugs are used to control heart rhythm, rate, and prevent the recurrence of arrhythmias. They are classified into classes I-IV based on Vaughan-Williams classification: Na+ channel blockers, beta-blockers, K+ channel blockers, and Ca2+ channel blockers. Treatment choice assesses the type of arrhythmia, causes, cardiac condition, drug interactions, and proarrhythmic risks. Adjusting dosage, ECG, electrolytes, and pharmacokinetic monitoring are needed. Acute and chronic strategies are differentiated