Drug Interaction Report

Using methenamine together with sulfadoxine is not recommended. Combining these medications may cause crystals to form in the urine. 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.

Oral medications may not be properly absorbed when they are taken within one hour before starting sodium biphosphate for bowel cleansing. Talk to your doctor or pharmacist to see if you should adjust the dosing schedule of your other medications before you begin bowel cleansing treatment. 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.

Ask your doctor before using hyoscyamine together with ethanol (alcohol). Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking hyoscyamine. You should be warned not to exceed recommended dosages and to avoid activities requiring mental alertness. If your doctor prescribes these medications together, you may need a dose adjustment to safely take this combination. 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.