Benzodiazepines, beta blockers (such as propranolol), carmustine, disulfiram, isoniazid, lidocaine, metronidazole, oral contraceptives, phenytoin, procainamide,
quinidine, triamterene, tricyclic antidepressants, warfarin, xanthines: Cimetidine decreases metabolism of these drugs, thus increasing potential toxicity. Dosage reduc-tion may be needed.
Digoxin: Serum levels may be reduced. Monitor serum digoxin.
Ferrous salts, indomethacin, ketoconazole, tetra-cyclines: Concomitant use may affect absorption of these drugs by altering gastric pH. Use to-gether cautiously. |