WARNING: CIGARETTE SMOKING AND SERIOUS CARDIOVASCULAR EVENTS See full prescribing information for complete boxed warning. Females over 35 years old who smoke should not use NEXTSTELLIS, Cigarette smoking increases the risk of serious cardiovascular events from combination oral contraceptive (COC) use. Before you start taking Nextstellis, tell your doctor:, About all the medications you take, including prescription, nonprescription, vitamins, and herbal supplements, About your allergies, About your health conditions, If you are pregnant, think you may be pregnant, or have plans to become pregnant, If you are breastfeeding or have plans to breastfeed, Nextstellis can increase your risk for blood clots, a heart attack, or a stroke. Cardiovascular risk factors should be considered before starting Nextstellis., Nextstellis can cause high potassium levels in your blood. Your potassium levels should be checked regularly. Call your doctor right away if you develop muscle fatigue, weakness, irregular heart rhythms, nausea, or paralysis., Nextstellis can cause high blood pressure. You should periodically check your blood pressure., Nexstellis can cause migraines that may become severe or won't go away., Nexstellis can cause liver problems., Nextstellis can increase your risk for hormonally-sensitive cancers such as breast cancer., Nexstellis can decrease glucose intolerance in women who have prediabetes or diabetes., Nexstellis can increase triglyceride levels in women who have elevated triglyceride levels or have a family history of elevated triglyceride levels. This can lead to pancreatitis., Nextstellis can cause gallbladder problems and cholestasis., Nextstellis can cause irregular vaginal bleeding or no menstruation. About all the medications you take, including prescription, nonprescription, vitamins, and herbal supplements, About your allergies, About your health conditions, If you are pregnant, think you may be pregnant, or have plans to become pregnant, If you are breastfeeding or have plans to breastfeed