Discontinue immediately at 1st sign of migraine headache or more frequent occurrence of unusually severe headaches; sudden vision or hearing disturbances; thrombophlebitis or thromboembolic symptoms; feeling of chest pain & tightness; scheduled surgery (6 wk beforehand); immobilization; onset of jaundice, hepatitis, itching of whole body, increased epileptic seizures, significant increase in BP; pregnancy; unusual upper abdominal complaints not disappearing spontaneously w/in a short period. Not to be used in patients w/ thromboembolic disease; women w/ history of vasculitis, obesity, diabetes or HTN); known or suspected cervical or breast cancer; men. Diabetes, high BP, varicose veins, otosclerosis, multiple sclerosis, epilepsy, porphyria, tetany, chorea minor. History of phlebtis or tendency to diabetes. Smoking especially women >35 yr. Concomitant use w/ barbiturates, phenylbutazone, hydantoins, rifampicin, ampicillin. Insulin & antidiabetic requirements may change. Increased risk of thrombosis; venous & arterial thromboembolic diseases. Not to be used in patients w/ hepatic disease; known or history of liver tumours.