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This medication has the potential to interact with several other substances, which could affect its effectiveness or increase the risk of side effects. Here are key points to consider:

• Drug Interactions: Be aware that this drug may interact with medications such as altretamine, cisplatin, certain anti-seizure medications like phenytoin, and levodopa. Additionally, interactions with other vitamin or nutritional supplements might occur.

• Laboratory Interference: This product can interfere with specific laboratory tests, including those for urobilinogen and intrinsic factor antibodies, possibly leading to inaccurate results. It is important to inform your laboratory personnel and all your healthcare providers about your use of this medication.

Always discuss any concerns or questions with your healthcare provider to ensure safe and effective use of this medication.

Common side effects:

• upset stomach
• flushing

Serious side effects:

• rash
• itching or swelling, particularly of the face, tongue, or throat
• severe dizziness
• difficulty breathing

Interactions with moderate risk that may require dose adjustment, closer monitoring, or timing changes:

• altretamine
• Cisplatin
• Phenytoin
• Levodopa

Interactions with low risk that usually do not require a change in therapy:

• other vitamin or nutritional supplements