Increased risk of heart problems w/ antiarrhythmic drugs (eg, amiodarone, dofetilide, disopyramide, dronedarone, ibutilide, quinidine and sotalol); antidepressants (eg, citalopram, escitalopram, duloxetine, fluoxetine, fluvoxamine, nefazodone, paroxetine, sertraline, St John's Wort (
Hypericum perforatum) or venlafaxine); antipsychotics (eg, fluphenazine, levomepromazine, perphenazine, pimozide, prochlorperazine, promazine, sertindole, thiorizadine, trifluoperazine, triflupromazine, ziprasidone); antibacterials (eg, azithromycin, clarithromycin, erythromycin, levofloxacin, moxifloxacin, telithromycin); antifungals (eg, pentamidine, itraconazole, posaconazole, voriconazole); antimalarials (eg, halofantrine); anti-emetics (eg, dolasetron, chlorpromazine, promethazine); antineoplastics (eg, toremifene, vandetanib); bepridil; methadone; anxiolytics (eg, alprazolam or buspirone); bupropion; antiepileptics (eg, carbamazepine, phenobarb, phenytoin); rifampicin; ketoconazole tab; indinavir, ritonavir or saquinavir; verapamil; diuretics. Co-administration w/ lithium; tranquilisers; strong pain killers; TCAs; drugs that lower BP (eg, guanethidine, methyldopa); adrenaline; stimulants; levodopa; blood thinners (eg, phenindione); alcohol.