The active substance is desogestrel, ethinyl estradiol.
This drug should be used with caution with other drugs, since the interaction can lead to bleeding outside the cycle, reducing the effectiveness of contraception. Various side effects may occur - thrombosis, increased blood pressure, chloasma, allergic reactions, spotting.
The method of application of the drug, the dose is determined by the gynecologist, taking into account the task to be achieved - emergency contraception or birth control. "Mersilon" is forbidden to use in case of a history of such diseases - thrombosis, diabetes mellitus, pancreatitis, liver tumors, pregnancy, feeding, lactose intolerance, and lactase deficiency.