Warnings are a mix of Precautions. Contraindications and interactions and serious harmful effects associated with the medicine intake. A diabetic or Hypertensive patient need to be warned about few drug interactions. A known hypersensitivity patient needs to be careful about the reactions or anaphylactic shock. A pregnant woman or a breastfeeding woman should be warned of certain medications. A Hepatitis [liver disease] patient or a cardiac patient should avoid few drugs.
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May increase risk of arterial and venous thrombotic and thromboembolic diseases e.g. MI, stroke, deep venous thrombosis and pulmonary embolism. Caution when used in patients who are obese (BMI >30 kg/m2, have hypertension or dyslipoproteinaemia, vavular heart disease or atrial fibrillation. Heavy smokers >35 yr of age. Recommended to discontinue use at least 6 wk before and for 2 wk after elective surgery that may involve prolonged immobilisation. May increase severity and frequency of migraines. May increase risk of cervical carcinoma. May affect glucose tolerance. Efficacy of oral contraceptive may be reduced in the event of severe diarrhoea or vomiting. Lactation.
References
DailyMed. "ETHINYL ESTRADIOL; NORETHINDRONE ACETATE: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).