Drug Interactions between bismuth subsalicylate and dihydrocodeine / guaifenesin

Using bismuth subsalicylate together with dihydrocodeine can increase the blood levels or add to the side effects of either medication. Talk with your doctor before using these medications together. Call the doctor if you have side effects such as extreme drowsiness, dizziness, weak pulse, slow heart rate, sweating, urinating less than usual, severe stomach cramps or bloating, and vomiting. You should avoid activities requiring mental alertness until you know how these medications affect you. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.