December 7, 2011: Evidence of Greater Risk of Drospirenone-Containing Oral Contraceptives (YAZ and Yasmin)
Seven independent studies show that the hormone drospirenone (DRSP) contained in YAZ and Yasmin has a greater risk of venous thromboembolism (VTE, i.e. blood clots) than other oral contraceptives. The studies are:
- Lidegaard Ø, Løkkegaard E, Svendsen AL, Agger C. “Hormonal contraception and risk of venous thromboembolism: national follow-up study.” BMJ. 2009 Aug 13; 339. (Denmark)
- Lidegaard Ø, Nielsen LH, Skovlund CW, Skjeldestad FE, Løkkegaard E. “Risk of venous thromboembolism from use of oral contraceptives containing different progestogens and oestrogen doses: Danish cohort study, 2001-9.” BMJ. 2011 Oct 25; 343. (Denmark)
- Jick SS, Hernandez RK. "Risk of non-fatal venous thromboembolism in women using oral contraceptives containing drospirenone compared with women using oral contraceptives containing levonorgestrel: case-control study using United States claims data." BMJ. 2011 Apr 21; 342. (U.S.)
- Parkin L, Sharples K, Hernandez RK, Jick SS. "Risk of venous thromboembolism in users of oral contraceptives containing drospirenone or levonorgestrel: nested case-control study based on UK General Practice Research Database." BMJ. 2011 Apr 21; 342. (U.K.)
- FDA-Funded Study Entitled “Combined Hormonal Contraceptives (CHCs) and the Risk of Cardiovascular Disease Endpoints” (Final Report, Nov. 3, 2011) (U.S. - Kaiser database)
- Gronich N, Lavi I, Rennert G. "Higher risk of venous thrombosis associated with drospirenone-containing oral contraceptives: a population-based cohort study." CMAJ. 2011 Nov 7. (Israel)
- van Hylckama Vlieg A, Helmerhorst FM, Vandenbroucke JP, Doggen CJ, Rosendaal FR. "The venous thrombotic risk of oral contraceptives, effects of oestrogen dose and progestogen type: results of the MEGA case-control study." BMJ. 2009 Aug 13; 339. (Holland)
The seven studies by five different research teams in five different countries, independent of Bayer and each other, all found higher risk of venous thromboembolic events (VTE, i.e. blood clots) among users of DRSP-containing oral contraceptives (i.e. YAZ/Yasmin). The seventh is a recent FDA study awaiting publication.
The relative risk of VTEs, the studies found, for drospirenone-containing OCs like YAZ and Yasmin compared to other oral contraceptives ranged from 1.43 to over 2 (i.e. twice the rate versus other oral contraceptives).
All seven of these studies were peer-reviewed in major journals.
In contrast, Bayer claims there is no increased risk blood clots or VTEs among drospirenone-containing oral contraceptives based on studies they sponsored. A major study conducted by Bayer was the EURAS study (European Active Surveillance Study). EURAS was sponsored by Bayer and conducted by a company called ZEG, a subsidiary of a major marketing firm. In addition to being sponsored by Bayer, ZEG’s co-owner/study director, Dr. Dinger, was a former Bayer (formerly Schering) employee and many study “advisors” were in fact paid consultants for Bayer. Furthermore, the ZEG study had several serious design flaws.
Another study sponsored by Bayer which found no increased risk of VTEs among drospirenone-containing oral contraceptives was the Ingenix study. The Ingenix study also had serious design flaws and lacked the power to detect meaningful differences between groups of oral contraceptives being studied.
EU and UK Scientific Reviews Found Greater VTE Risk of DRSP-OCs
- VTE risk of DRSP-OCs with “is higher than the risk associated with combined pills containing levonorgestrel;” (U.K. Pharmocovigilance Expert Advisory Group May 10, 2011.)
- “Yasmin: risk of venous thromboembolism higher than levonorgestrel-containing pills.” (U.K. Medicinal products Regulatory Health Agency (MHRA), June 6, 2011.)
- Risk of VTE for DRSP-OCs is “higher than for levonorgestrel-containing” OCs. (E.U. Pharmacovigilance Working Party, May 26, 2011.)
- Evidence of higher risk stronger now; three additional studies (Lidegaard 2011, FDA/Kaiser and Gronich/Israeli study).
In sum,
- Seven consecutive independent studies unanimously showed higher risk of DRSP.
- E.U and U.K expert panels agree with findings by the independent studies.
- Only Bayer-sponsored studies failed to show higher risk of DRSP.
December 5, 2011: Recently Unsealed Court Documents Show that Bayer Withheld Important Safety Data from the FDA Concerning Its Birth Control Pills Yasmin and YAZ
On December 5, 2011 a federal court unsealed reports by several expert witnesses hired by plaintiffs in the YAZ/Yasmin litigation. Bayer is currently facing thousands of lawsuits nationwide filed by users of its popular birth control pills Yasmin and YAZ. The plaintiffs in the case allege that YAZ and Yasmin caused them to suffer serious injuries including serious and life-threatening blood clots.
Bayer’s contraceptives generated $1.58 billion in sales last year. Yasmin and YAZ contain a hormone called drospirenone which has been the subject of safety concerns. A number of independent studies have been published showing an increase of blood clots among women taking drospirenone-containing contraceptives compared to other types of oral contraceptives. In October 2011, the FDA published an analysis which warned that women taking YAZ and Yasmin were 74 percent more likely to suffer blood clots than women on other low-dose estrogen contraceptives.
The newly released expert witness reports found that Bayer withheld important safety information from the FDA regarding its products YAZ and Yasmin. Some of the reports also conclude that Bayer engaged in the practice of selling YAZ and Yasmin for off-label uses (uses unapproved by the FDA), such as for the treatment of premenstrual syndrome (PMS). The reports also reference numerous internal Bayer documents, including emails, memos and presentations in support of the experts’ opinions.
One of the expert witness reports, written by the former commissioner of the FDA, states “Bayer presented a selective view of the data, and that presentation obscured the potential risks associated with Yasmin.” The report also states that Bayer failed to include an analysis that “demonstrated an increase in the U.S. reporting rate” for venous thromboembolism (VTE) or blood clots in a 2004 safety review of Yasmin provided to the FDA. The report further points out that an earlier draft of that 2004 review submitted to the FDA included an opinion by company researchers that the “spontaneous reporting data do signal a difference in the VTE rates for Yasmin.” However, this statement was not included in the final version submitted to the FDA.
The report also finds that the company withheld important safety information concerning the risk of blood clots before Yasmin was approved. In his report, the former head of the FDA, states that, “These facts would impact the agency’s risk-benefit equation about the drug and whether it could be approved.” He concludes, “Had I, or a medical review officer, known these facts prior to approval, further investigation would have been warranted before a decision on Yasmin’s NDA [New Drug Application] could be made.”
In addition, the report criticizes the way the company evaluated and handled spontaneous adverse event reports. The former head of the FDA states in the report, “Bayer’s spontaneous reporting analysis demonstrated a safety signal about Yasmin and VTE risk,” and further, “Bayer had a duty to present a full and balanced view of all the data and analysis concerning Yasmin to the FDA and health-care professional and failed to do so.”
The expert witness reports also find that Bayer promoted YAZ and Yasmin for “off-label” uses such as treatment of premenstrual syndrome (PMS) or symptoms of PMS. Such “off-label” promotion violates FDA regulations. One of the expert witness reports cites to internal Bayer documents showing that the company hired a Los Angeles based gynecologist to help promote their products citing an internal company email in which a Bayer representative noted that the physician would “mention off-label benefits of our products.” As part of her promotion efforts, the gynecologist wrote a book which contained “off-label” claims about Yasmin, including statements that Yasmin could help women with PMS-related symptoms such as fluid retention, bloating, and depression. Cited documents in the report show that Bayer also planned to purchase 10, 000 copies of the book as part of a “strategy to have the book appear on the New York Times bestseller list.” Other documents cited in the expert witness report show that the company secured story placements in women’s magazines such as Allure, which touted ”off-label” benefits of YAZ for treating PMS.
According to an attorney representing the Plaintiffs, the newly unsealed documents were provided to the FDA because “they contain relevant information obtained from Bayer that has not been previously provided to the FDA and will assist the committee and the FDA in its own evaluation of the benefits and risks of drospirenone-containing oral contraceptives.”
The FDA has set a December 8, 2011 hearing to discuss the findings and determine if the YAZ and/or Yasmin labels should carry additional warnings or if other actions are warranted. Materials from both Plaintiffs and Defendants have been submitted to the FDA for consideration at the hearing. The recently unsealed expert witness reports were submitted to the FDA after the submission deadline for written materials, so it is uncertain whether such documents will be considered by the FDA prior to the hearing.
October 14, 2011: ABC Nightline’s Chris Cuomo presented an investigation of DRSP (DROSPIRENONE) containing birth control pills. Click HERE to watch the “ABC NEWS YAZ Bitter Pill Investigation”.

The story also aired on Good Morning America on October 15, 2011. It featured the case of C. Ubersox, a 24 year-old woman who, after seeing YAZ commercials featuring healthy and fit women, decided to use YAZ to lose weight in preparation for her upcoming wedding. While on YAZ, however, she suffered bilateral pulmonary emboli. Her heart stopped en route to the hospital. She fell into a coma and when she awoke, she was blind. She explained to ABC Nightline and Good Morning America how she lost her career, her fiancé, and her eyesight, all results of injuries suffered while taking YAZ. BAYER declined to participate in the ABC interview. The print story “New Studies Find YAZ More Risky Than Other Leading Birth Control Pills: ABC News Investigates” is available at http://abcnews.go.com/TheLaw/studies-find-yaz-risky-leading-birth-control-pills/t/story?id=14741760
On September 26, 2011, the FDA announced that it is convening an advisory panel in December 2011 to review and evaluate emerging science and data regarding the risks of “VTEs”, or blood clots, associated with using DRSP (drospirenone) birth control pills such as YAZ and Yasmin. The FDA has acknowledged that 'concern' exists over the risks associated with YAZ and Yasmin.
November 11, 2009 – Mark P. Robinson, Jr. appointed by MDL Chief Judge David R. Herndon to the Plaintiff’s Steering Committee for the Yaz/Yasmin litigation.
January 11, 2010 – Mark P. Robinson, Jr. argues in favor of Los Angeles County hosting the JCCP Coordinated Proceeding for all Yaz/Yasmin cases filed in California state court.

As many as 100 deaths have been attributed to YAZ / Yasmin ® oral contraceptives to date. In 2003 and again in 2008 the Federal Food and Drug Administration (FDA) issued severe warnings in connection with the advertising claims made by the manufacturer, Bayer. Robinson Calcagnie Robinson Shapiro Davis, Inc. has filed cases against the manufacturers of Yasmin®, Yaz® and Ocella® for injuries suffered by women who took these oral contraceptives.
The Defective Pharmaceuticals & Medical Devices litigation group at Robinson Calcagnie Robinson Shapiro Davis, Inc. has experienced trial lawyers who focus on representing plaintiffs in oral contraceptive litigation. If you, or a family member, have suffered serious injury, coma or death stemming from the use of Yaz®, Yasmin® or Ocella®, contact the personal injury attorneys at Robinson Calcagnie Robinson Shapiro Davis, Inc. today to schedule an appointment.
Click Here for a YAZ / Yasmin Lawsuit Evaluation.