Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include: cisapride, dofetilide, iron products (such as ferrous sulfate, ferrous gluconate), lithium.
Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine) within 2 weeks before and during treatment with this medication. In some cases a serious (possibly fatal) drug interaction may occur.
Tell your doctor or pharmacist if you are taking other products that cause drowsiness including alcohol, antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine).
Check the labels on all your medicines (such as allergy or cough-and-cold products, diet aids, or NSAIDs such as ibuprofen, naproxen) because they may contain ingredients that cause drowsiness or increase your blood pressure. Ask your pharmacist for more details.
This medication may interfere with certain laboratory tests (including parathyroid test, protein-bound iodide test, urine catecholamine test), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.