<p>The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions&nbsp;are possible, but do not always occur. Your doctor or&nbsp;pharmacist&nbsp;can often prevent or manage interactions by changing how you use your medications or by close monitoring.<br />
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To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including&nbsp;prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor&#39;s approval.<br />
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Some products that may interact with this vitamin include:&nbsp;altretamine,&nbsp;cisplatin, phenytoin.<br />
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This vitamin may interfere with certain laboratory tests (including&nbsp;urine test&nbsp;for urobilinogen), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this vitamin.</p>