Two WA mothers who developed life-threatening blood clots in their lungs while taking a popular contraceptive pill have signed up to a potential class action against the manufacturer of the drug.
Adelaide law firm Tindall Gask Bentley is investigating launching a lawsuit against pharmaceutical company Bayer on behalf of women who claim to have suffered serious health problems while taking Yaz or Yasmin.
About 230 women from across the country have made contact with the firm, including 15 from WA.
Esperance woman Amanda Saul said she had been taking Yaz for more than two years when doctors discovered a number of blood clots in her lungs in early 2010.
While she had been travelling shortly before the clots were found, the 29-year-old said doctors told her the pill had "greatly exacerbated" her health problems.
"I had one (blood clot) close to my heart and I had one in my lung that had blocked off an entire section and was turning gangrenous," Ms Saul said.
"They told me I was most likely 24 to 48 hours away from a massive stroke or heart attack at 25 years old."
Yasmin was launched in Australia in 2002, while its sister drug Yaz was introduced to the market in 2008. It is understood about 200,000 Australian women are prescribed the drugs each year.
Trine Kremer, a mother of two from Quinns Rocks, also claims taking Yaz led to the formation of blood clots in her lungs last year.
The 42-year-old said she believed women needed to be made more aware of the possible side effects of the drug.
"I see myself as lucky because I could have easily ended up in a box but I'm still here," she said.
"I have never been through anything as scary as that."
Two studies published in the British Medical Journal in 2011 found women who used contraceptive pills like Yasmin were twice as likely to develop blood clots. But a spokeswoman for Bayer said all medicines, including contraceptives, carried benefits and risks.
"The small risk of clots with all combined oral contraceptive pills has been recognised for many years," she said.
"This is clearly outlined in the product information supplied to doctors and the consumer medicine information provided to women prescribed the pill."
Tindall Gask Bentley partner Tim White said he had spoken to women who had suffered strokes, heart attacks and pulmonary embolisms while on the medication.
"In the US, there has certainly been millions of dollars compensation paid in settlements arising from these two drugs," he said.