Bloomberg News

France to Suspend Bayer’s Acne Drug Diane 35 on Safety Risk

January 30, 2013

French health authorities said they plan to suspend sales of Bayer AG (BAYN)’s Diane 35 acne treatment, which is often used as a birth-control pill, amid concern the medicine increases the risk of blood clots.

A review of the treatment’s risk-benefit balance proved to be “unfavorable,” Dominique Maraninchi, director general of the Agence Nationale de Securite du Medicament et des produits de Sante, said today. The suspension will take “full effect” in three months, he said.

Diane 35 “isn’t approved for use as a contraceptive,” Maraninchi told reporters during a press conference in Saint- Denis, outside of Paris.

Starting today, French doctors will no longer have the right to prescribe the medicine, Maraninchi said. Pharmacists will be allowed to sell the treatment in limited quantities to women using it until they have the time to get a different prescription, he said. About 315,000 women in France use Diane 35 or a generic version of the drug, according to the regulator.

“We are surprised by this action taken by the ANSM,” Astrid Kranz, a Bayer spokeswoman, said in a statement. “We are not aware of any new scientific evidence leading to a change in the positive benefit-risk assessment of Diane 35.”

French authorities are probing Diane 35, after the medicine was linked to four deaths from blood clots in the past 25 years, the regulator, best known as ANSM, said this month.

ANSM has been moving quickly to avoid criticism such as that caused by a scandal involving Les Laboratoires Servier’s Mediator, a medicine pulled from the market after 33 years in 2009 over concerns it caused heart-valve damage and deaths.

To contact the reporter on this story: Albertina Torsoli in Paris at

To contact the editor responsible for this story: Phil Serafino at

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