Birth Control Pill Yaz Dangerous?

Government considers new warnings for the popular brand of contraceptive.
2:47 | 12/07/11

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Transcript for Birth Control Pill Yaz Dangerous?
In healthy living tonight the government is considering whether to require new warnings on one of the country's most popular birth control pills. It's called yeah -- has been marketed as something of a magic pill to treat common ailments while prevents pregnancy. US sales totaled nearly 800 million dollars in 2009. But new research suggests that -- -- endangering some women. Here's one actually anchor Chris Cuomo. The film born and turn. Yeah has pitched as a dream come true for women. A birth control pill but also affected at easing severe PMS. Even clearing up your skin that's the only animal sounds like American -- 24 year old nurse chorus -- -- says this ad got her to switch to gas. -- One night after a few months on the drug her legs started to -- soon she was gasping for rare. Then her heart stopped. Four minutes and no heartbeat. Also known as debt. Texas -- -- massive blood clots traveled from choruses legs to her -- she slipped into a coma and when she woke up. Right now. Can you see me now. Can you see anything. All birth control pills come with some risk two to four women for 101000 will suffer blood clots but with jazz which is made by bear several new independent studies have put that risk two to three times higher. The two -- sponsored studies found no difference in risk -- -- for independent study that increased risks. Doctor -- -- authored an independent study involving a million women. She says she sent her findings to bear but was surprised they didn't respond. This studies at a -- increased risks and not in the best interest of the company. And this week the FDA will hold hearings to determine if -- as packaging should have stronger warnings about blood clots. The FDA has already warned yes was not shown to be effective for common PMS and force Bayer to pull those PMS acts. But by then millions of women had already switched including -- You don't have the future you thought you're going to happen. Can you believe. It all happen. And started with a pill called yes yes. Baer denies wrongdoing and says yes has it quote favorable benefit risk profile when used as directed from recess and other alleged victims are so it. Saying yes has higher risks -- other birth control pills and George this is the important point they say. They can show that bear was aware of the risks and concealed. The evidence that makes that -- some very very important -- could be explosive OK Chris Cuomo thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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