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etonogestrel/ethinyl estradiol ring - vaginal, Nuvaring (cont.)

DRUG INTERACTIONS: Your healthcare professionals (e.g., 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 them first.This drug should not be used with the following medications because very serious interactions may occur: aromatase inhibitors (e.g., anastrozole, exemestane), sodium tetradecyl sulfate, troleandomycin.If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting this medication.Before using this medication, tell your doctor of all prescription and nonprescription medications you may use, especially of: raloxifene, tamoxifen, medication for underactive thyroid (hypothyroidism), drugs that may increase blood levels of this drug such as acetaminophen, ascorbic acid (vitamin C), atorvastatin, azole antifungals such as itraconazole/ketoconazole/vaginal miconazole.Certain drugs can decrease the effectiveness of combination-type birth control by decreasing the amount of birth control hormones in your system. This can result in pregnancy. These drugs include: many antibiotics (e.g., cephalosporins, chloramphenicol, macrolides such as erythromycin, penicillins, sulfas), aprepitant, bexarotene, bosentan, dapsone, felbamate, griseofulvin, certain HIV protease inhibitors (e.g., amprenavir, nelfinavir, ritonavir), modafinil, nevirapine, phenylbutazone, rifamycins (e.g., rifampin), many seizure medications (e.g., barbiturates, carbamazepine, oxcarbazepine, phenytoin, lamotrigine, topiramate), St. John's wort. Consult your doctor or pharmacist for details, and ask them if you should use additional reliable birth control methods while taking any of the drugs mentioned above.This drug can speed up or slow down the removal of other drugs from your body by affecting certain liver enzymes. These affected drugs include acetaminophen, aspirin, clofibrate, cyclosporine, morphine, corticosteroids such as prednisolone, certain benzodiazepines such as lorazepam/temazepam, and theophylline, among others. If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting this medication.This medication can affect the results of certain lab tests (e.g., blood tests for clotting factors, thyroid). Make sure laboratory personnel and all your doctors know you use this medication.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.



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