Drug Interactions
Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: drugs that may cause nerve damage (e.g., certain HIV drugs including didanosine/zalcitabine, certain cancer drugs including paclitaxel/cisplatin/vincristine, quinolone antibiotics such as ciprofloxacin). Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: alcohol, certain antihistamines (e.g., diphenhydramine), anti-seizure drugs (e.g., carbamazepine), medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., chlorpromazine, risperidone, amitriptyline, trazodone). Check the labels on all your medicines (e.g., cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely. It is very important for women to use 2 forms of effective birth control while taking this medication. Certain drugs can decrease the effectiveness of hormonal birth control (e.g., pill, patch, ring) by decreasing the amount of birth control hormones in your body. This can result in pregnancy. These drugs include: many antibiotics (e.g., cephalosporins, chloramphenicol, macrolides such as erythromycin, tetracyclines, penicillins, sulfas), aprepitant, bexarotene, bosentan, dapsone, felbamate, griseofulvin, HIV protease inhibitors (e.g., amprenavir, nelfinavir, ritonavir), modafinil, nevirapine, phenylbutazone, rifamycins (e.g., rifampin), many seizure medications (e.g., barbiturates, carbamazepine, phenytoin, lamotrigine, topiramate), St John's wort, troglitazone. Consult your doctor or pharmacist for details, and ask if you should use additional reliable birth control methods while using any of these drugs listed above and for 1 month after stopping them. This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.