The helpline, known as the Reference Centre on Drug-Facilitated Sexual Assault (or CRAFS, its acronym in French), was launched by a Paris health centre on October 15.

That was in the middle of testimony at the rape trial of Dominique Pelicot and 50 other defendants, which has shocked the country, sparked mass protests and raised awareness in France about the use of drugs to commit abuse.

For years, Gisele Pelicot, Dominique's now-former wife, had strange memory lapses and other health problems, consulting numerous doctors who could not pinpoint the cause.

Then police told her she had been drugged and raped for nearly a decade by her husband and dozens of strangers he recruited online.

Since its launch, the helpline has received a wave of calls from healthcare providers and victims seeking information about drug-related abuse, said Leila Chaouachi, a doctor who founded the service.