What is Estrostep 21?

Estrostep 21 is no longer available in the United States.

Estrostep 21 is a prescription birth control pill that is taken for 21 days each month, followed by seven “reminder” pills with no medication to complete the month. It is also used to treat acne in women over 15 years old.

Containing the drugs ethinyl estradiol and norethindrone, this drug works by acting like a combination of the hormones estrogen and progestin to stop a woman from producing eggs. This combination may also work by changing the chemistry in a woman’s cervix or the lining of her uterus in a way that keeps sperm from getting in or keeps fertilized eggs from sticking.

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