Common sodium channel blockers which cause QRS widening.



Anticonvulsants: 

 - Carbamazepine 

Antidysrhythmics:  

 - Group IA and IC 

 - Group II (Propranolol) 

 - Group IV (Diltiazem and Verapamil) 

Antihistamines: 

 - Diphenhydramine 

Antimalarial drugs: 

 - Chloroquine 

 - Hydroxychloroquine 

 - Quinine 

Antipsychotics: 

 - Phenothiazines 

Drugs of abuse: 

 - Cocaine 

Opioids: 

 - Propoxyphene 

Other antidepressants 

 - Bupropion 

 - Mirtazapine 

 - Venlafaxine 

Tricyclic Antidepressants 

 - Amitriptyline 

 - Desipramine 

 - Doxepin 

 - Imipramine 

 - Maprotiline 

 - Nortriptyline 

Antiviral: 

 - Amantadine 

Beta Blockers: 

 - Propranolol 

Chemotherapy drugs 

 - Adriamycin 



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