If you use birth control medications, including NuvaRing, you are strongly advised not to smoke.Do not use a diaphragm as a back-up form of birth control with NuvaRing, because it interferes with the correct placement and position of the diaphragm.Go for an annual check-up while on NuvaRing so your doctor can evaluate how you are doing, especially if you have high blood pressure or high cholestero