List of QT prolonging drugs

Antiarrhythmics	Class 1: dihydroquinidine, disopyramide, encainide, flecainide, mexiletine, procainamide, propafenone and quinidine
	Class 3: amiodarone, azimilide, bretylium, dofetilide, dronedarone, d-sotalol, ersentilide, ibutilide, nifekalant, sematilide and sotalol
Anti-anginals/vasodilators	Bepridil, lidoflazine, prenylamine, ranolazine, terodiline and vardenafil
Anti-hypertensives	Indapamide, isradipine, moexipril/hydrochlorthiazide and nicardipine
Antihistamines	Astemizole, azelastine, diphenhydramine, ebastine, hydroxyzine and terfenadine
Serotonin agonists and antagonists	Cisapride, dolasetron, granisetron, ketanserin and ondansetron
Antimicrobials	Macrolide antibiotics: azithromycin, clarithromycin, erythromycin, roxithromycin, spiramycin and telithromycin
	Quinolone antibiotics: ciprofloxacin, gatifloxacin, gemifloxacin, grepafloxacin, levofloxacin, moxifloxacin, ofloxacin and sparfloxacin
	Antifungals: cotrimoxazole, fluconazole (caution with itraconazole), ketoconazole and voriconazole
	Others: pentamidine and trimethoprim sulfa (bactrim)
	Antiviral: foscarnet (HIV)
Antimalarials	amantidine, chloroquine, halofantrine and quinine.
Psychiatric drugs	Tricyclic antidepressants: amitriptyline, amoxapine, clomipramine, desipramine, doxepin, imipramine, nortriptyline, protriptyline and trimipramine.
	Phenothiazines: chlorpromazine, fluphenazine, prochlorperazine, thioridazine and trifluoperazine.
	Others: atomoxetine, citalopram and clozapine, droperidol, fluoxetine, haloperidol, levomethadyl, lithium, maprotiline, mesoridazine, methadone, paroxetine, pericycline, pimozide, quetiapine, risperidone, sertindole, sertraline, trazodone, venlafaxine, zimeldine and ziprasidone.
Anticonvulsant	Felbamate and fosphenytoin (prodrug of phenytoin).
Anti-migraine	Naratriptan, sumatriptan and zolmitriptan
Anti-cancer	Arsenic trioxide, geldanamycin, sunitib, tacrolimus and tamoxifen
Stimulant drugs	Some cold remedies contain these drugs, so it is important always to check the label. Adrenaline (epinephrine), amphetamine, cocaine, dexmethylphenidate, dobutamine, dopamine, ephedrine, fenfluramine, isoprenaline (isoproterenol), levalbuterol, metaproterenol, methylphenidate, midodrine and norepinephrine (noradrenaline), phentermine, phenylephrine, phenylpropanolamine, pseudoephidrine, ritodrine, salbutamol (albuterol), salmeterol, sibutramine and terbutaline.
Others	Alfuzosin, chloral hydrate, clobutinol, domperidone, galantamine, octreotide, organophosphates, perflutren lipid microspheres, probucol, solifenacin, tizanidine, tolterodine and vasopressin.