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Do not breastfeed while using NuvaRing®. Some of the medicine may pass through the milk to the baby and could cause yellowing of the skin (jaundice) and breast enlargement in your baby. NuvaRing® could also decrease the amount and quality of your breast milk.
The hormones in NuvaRing® can interact with many other medicines and herbal supplements. Tell your health care provider about any medicines you are taking, including prescription medicines, over-the-counter medicines, herbal remedies, and vitamins.
The blood levels of the hormones released by NuvaRing® were increased when women used a vaginal medication (miconazole nitrate) for a yeast infection while NuvaRing® was in place. The pregnancy protection of NuvaRing® is not likely to be changed by use of these products. The blood levels of these hormones were not changed when women used vaginal, water-based spermicides (nonoxynol or N-9 products) along with NuvaRing®.
Certain drugs and herbal supplements may interact with combined hormonal contraceptives to make them less effective in preventing pregnancy or cause an increase in breakthrough bleeding. Such drugs include rifampin, drugs used for epilepsy such as barbiturates (for example, phenobarbital), carbamazepine, and phenytoin, primidone, topiramate, phenylbutazone, modafinil, and some drugs used for HIV such as ritonavir. Pregnancies and breakthrough bleeding have been reported by users of combined hormonal contraceptives who also used the herbal supplement St. John’s Wort. You may need to use a nonhormonal method of contraception during any cycle in which you take drugs that can make oral contraceptives less effective. Be sure to tell your health care provider if you are taking or start taking any other medications, including nonprescription products or herbal products, while using NuvaRing®.
While using NuvaRing®, you should not rely upon a diaphragm when you need a backup method of birth control because NuvaRing® may interfere with the correct placement and position of a diaphragm. If you are scheduled for any laboratory tests, tell your doctor or health care provider you are using NuvaRing®. Contraceptive hormones may change certain blood tests results.
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