Tell your doctor about all other medicines you use, especially:
arsenic trioxide (Trisenox);
chloroquine (Arelan) or halofantrine (Halfan);
cyclosporine (Gengraf, Neoral, Sandimmune);
droperidol (Inapsine);
narcotic medication such as levomethadyl (Orlaam) or methadone (Dolophine, Methadose);
pentamidine (NebuPent, Pentam);
vinblastine (Velban);
antibiotics such as azithromycin (Zithromax), clarithromycin (Biaxin), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin, Pediazole), pentamidine (NebuPent, Pentam), or telithromycin (Ketek);
medicines to treat psychiatric disorders, such as chlorpromazine (Thorazine), haloperidol (Haldol), mesoridazine (Serentil) pimozide (Orap), or thioridazine (Mellaril); or
heart rhythm medicine such as amiodarone (Cordarone, Pacerone), dofetilide (Tikosyn), disopyramide (Norpace), procainamide (Procan, Pronestyl), quinidine (Quin-G), or sotalol (Betapace).
This list is not complete and there are many other drugs that can interact with tolterodine. Tell your doctor about all medications you use. This includes prescription, over the counter, vitamin, and herbal products. Do not start a new medication without telling your doctor. Keep a list of all your medicines and show it to any healthcare provider who treats you.
 Tolterodine drug interactions (more detail)
