 Terfenadine (used for allergy)  Astemizole (used for allergy)  Cisapride (used for stomach problems)  Pimozide (used for treating mental illness)  Quinidine (used for irregular heart beat)  Rifampicin (used for treating tuberculosis)  Carbamazepine (used to treat seizures)  Phenobarbital (used for severe insomnia and seizures)