Birth control pills prevent menstruation

The US Food and Drug Administration has approved the release of a birth control pill that can eliminate women's monthly periods. The drug is called Lybrel, produced by Wyeth pharmaceutical company.

It contains two hormones which are widely used on oral contraceptives, levonorgestrel and ethinyl estradiol.

Traditional contraceptives are usually taken continuously for 21 days, then 7 days by placebo or no medication, to create time for menstruation to occur. For many years, some women who took regular, regular contraceptives also had a period of menstrual cessation. However, Lybrel was the first drug to be approved for this purpose.

It takes a while for the menstrual cycle to be inhibited, so most women will see continuous or low blood flow during the first year of use, the FDA said. This phenomenon will gradually decrease. "The advantage of not having a menstrual cycle will win the inconvenience of unforeseen bleeding , " FDA said.

Wyeth has studied more than 2,400 women aged 18 to 49. 50% of those who took Lybrel within 1 year did not bleed during the last month.

This drug has the potential to cause side effects such as blood clots, and stroke, like traditional birth control pills. Some experts doubt that this natural reverse idea can bring troubles.

Medication will be available at stores in July.

T. An