This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Heart Rate Prior to Arrhythmia ====== Several of these drugs will initially cause tachycardia (due to anticholinergic or adrenergic effects), with bradycardia only occurring in severe poisoning. * [[:wikitox:2.1.11.9.2.1_tricyclic_antidepressants|Tricyclic antidepressants]] * [[:wikitox:2.1.11.9.3_antipsychotics|Antipsychotic drugs]] (particularly chlorpromazine and thioridazine) * Antimalarial drugs ([[:wikitox:chloroquine|]], [[:wikitox:quinine|]]) * [[:wikitox:3.4.3.4_antiarrhythmics|Antiarrhythmic drugs]] * [[:wikitox:2.1.11.4.1_anticholinergics|Orphenadrine]] CKG Edit