The studies were published in the British Medical Journal last month and report that women taking birth control pills containing drospirenone have 2.5 to three times the risk of suffering a blood clot than women on the safest pills on the market.
Most birth control pills contain progestin and estrogen, but only a handful use the synthetic hormone drospirenone for the progestin, including Yasmin and its sister pill, Yaz, which are manufactured by German-based Bayer.
In an email to Marketplace, a Health Canada official said the department "is evaluating the recently published studies and is looking at available information to fully assess the risk of blood clots."
UPDATE (Sept. 26/11): The FDA says they are concerned about drospirenone but no conclusions made yet: http://www.fda.gov/Drugs/DrugSafety/ucm273021.htm
Read Erica Johnson's full article on CBC.ca/News
