• C01BA Antiarrhythmics, class ia 4 drugs
• C01BB Antiarrhythmics, class ib 1 drugs
• C01BC Antiarrhythmics, class ic 14 drugs
• C01BD Antiarrhythmics, class iii 13 drugs
• C01BG Other antiarrhythmics, class i and iii 1 drugs