As with any medicine, use of Microgynon 30 may cause side effects in some users. Do not be alarmed when reading the list of side effects. You may not suffer from any of them. If you have one or more of the side effects, especially if it is severe or prolonged, or if there is a change in your health that you think can be related to Microgynon 30, inform your doctor. An increased risk of blood clots in the veins (venous thromboembolism [VTE]) or blood clots in the arteries (arterial thromboembolism [ATE]) exists in all women taking combined hormonal contraceptives.
Serious side effects: harmful blood clots in a vein or artery, allergic reaction, breast or cervical cancer
Common side effects(box): headache, nausea, abdominal pain, vomiting, tender breasts
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