biotics such as Biaxin and erythromycin Certain antidepressant drugs, including Elavil, Norpramin, and Tofranil Cimetidine (Tagamet) Cyclosporine (Neoral, Sandimmune) Digoxin (Lanoxin) Diltiazem (Cardizem) Disulfiram (Antabuse) Ergotamine Fluoxetine (Prozac) Fluvoxamine Grapefruit juice Isoniaz