| Kaolin has adsorbent properties and will reduce the intestinal absorption of a number of drugs. These include digoxin and lincomycin.Antacids may reduce the absorption of a number of drugs including: diflunisal, phenytoin, cimetidine, isoniazid, allopurinol, iron preparations, tetracyclines, phenothiazines, penicillamine, pivampicillin, atenolol, indomethacin, ketoprofen, metronidazole, ketoconazole, itraconazole, prednisolone, ciprofloxacin, ofloxacin, norfloxacin, rifampicin, azithromycin, fosinopril, dipyridamole, hydroxychloroquine, chloroquine, bisphosphonates.The excretion of quinidine is reduced in alkaline urine and may occasionally increase plasma levels. The excretion of aspirin is increased in alkaline urine. Antacids should be avoided with dipyridamole. | |