French drug watchdog and the pharmaceutical firm Servier are on trial over the long-running Mediator drug scandal.
Jacques Servier was founder of company that made Mediator weight-loss drug which has been blamed by officials for up to 500 deaths.
The makers of a diabetes and weight-loss drug suspected in the deaths of hundreds of people are accused of misleading the public about its safety.
Company boss faces manslaughter probe as victims complain of compensation delays over product that may have killed more than 500 people.
Trial opens of French pharmaceutical firm Servier for hiding dangers of diabetes drug used to lose weight and blamed for causing at least 500 deaths.