By Alexandra Sifferlin
May 28, 2015

It’s been known for quite some time that the Pill may increase a woman’s risk for blood clots, but the risk is thought to be low. As TIME reported on Tuesday, the study showed that women on the Pill had around a three times higher risk of blood clots compared to women who weren’t using the oral contraceptives. The risk appeared to be greater for women taking newer versions of the hormone progestogen, including drospirenone, desogestrel, gestodene and cyproterone. Older versions of the hormone, including levonorgestrel and norethisterone, had better results. You can read more here about why these versions may have a higher risk.

So, how do you know if your birth control pills contain ingredients that might be more harmful than not? Drospirenone and desogestrel are both approved for use in the U.S., and can be used in combination with other ingredients. We broke down which birth control brands contain them, according to approval data from the U.S. Food and Drug Administration (FDA). Gestodene and cyproterone are currently not approved for use in contraceptives in the states. There may also be other brands of the contraceptives that contain these ingredients available in other countries.

Drospirenone
Angeliq
Beyaz
Loryna
Nikki
Safyral
Syeda
Yaela
Yasmin
Yaz

Desogestrel
Cyclessa
Desogen
Emoquette
Enskyce
Kariva
Kimidess
Mircette
Ortho-Cept
Pimtrea
Velivet
Viorele

Read next: Why the Best Form of Birth Control Is the One No One Uses

Contact us at editors@time.com.

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