Drug Interaction Report

Using bisacodyl together with sodium bicarbonate may alter the effects of bisacodyl. Bisacodyl and sodium bicarbonate should be separated by at least one hour. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. 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.

Using polyethylene glycol 3350 together with bisacodyl may increase the risk of gastrointestinal side effects such as ulcerations in the colon and ischemic colitis (an inflammatory condition caused by reduced blood flow to the colon due to narrowed or blocked blood vessels). Although these side effects are relatively rare, they may be potentially serous and life-threatening, particularly ischemic colitis. Nonetheless, certain bowel cleansing regimens given prior to a colonoscopy may require the concurrent use of a stimulant laxative such as bisacodyl in order to be fully effective. You should avoid using these medications together unless specifically recommended or prescribed by your doctor. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. 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.

Guar gum may interact with other medications if given at the same time. This can cause your other medications to become less effective. In general, all oral medications should be administered at least 2 hours before or 2 hours after dosing of guar gum. Take guar gum with a full glass (at least 8 ounces) of cool water or another liquid. Taking guar gum without enough liquid may cause it to swell in the throat and cause choking.