Drug Safety and Availability > FDA Drug Safety Communication: Safety review update on the possible increased risk of blood clots with birth control pills containing drospirenone

The U.S. Food and Drug Administration (FDA) is informing the public that it has not yet reached a conclusion, but remains concerned, about the potential increased risk of blood clots with the use of drospirenone-containing birth control pills. FDA has completed its review of the two 2011 studies that evaluated the risk of blood clots for women who use drospirenone-containing birth control pills, previously mentioned in FDA's Drug Safety Communication issued on May 31, 2011. FDA is continuing its review of a separate FDA-funded study that evaluated the risk of blood clots in users of several different hormonal birth control products (contraceptives). Preliminary results of the FDA-funded study suggest an approximately 1.5-fold increase in the risk of blood clots for women who use drospirenone-containing birth control pills compared to users of other hormonal contraceptives. 
Given the conflicting nature of the findings from six published studies evaluating this risk, as well as the preliminary data from the FDA-funded study, FDA has scheduled a joint meeting of the Reproductive Health Drugs Advisory Committee and the Drug Safety and Risk Management Advisory Committee on December 8, 2011 to discuss the risks and benefits and specifically the 
Patients should talk to their healthcare professional about their risk for blood clots before deciding which birth control pill to use. Known risk factors that increase the risk of a blood clot include smoking, being overweight (obesity), and family history of blood clots, in addition to other factors that contraindicate use of birth control pills. 
Women currently taking a drospirenone-containing birth control pill should be informed of the potential risk for blood clots. FDA previously communicated preliminary information about these concerns to the public on May 31, 2011.

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Drug Safety and Availability > FDA Drug Safety Communication: Safety review update on the possible increased risk of blood clots with birth control pills containing drospirenone