The world anti-doping agency WADA will consider next year whether cannabis can be removed from the list of banned substances.
A scientific study will be conducted in 2022, WADA reported after an executive committee meeting in the Turkish city of Istanbul.
WADA received requests to review the status of cannabis, because the drug does not have a performance-enhancing effect.
According to athletes and other stakeholders, the rules regarding cannabis are dated.
In the run-up to the Tokyo Olympics, there was a fuss about cannabis.
21-year-old American sprinter Sha'Carri Richardson was ruled out because she tested positive after the trials in Eugene at the end of June.
She said she had taken marijuana to cope with the grief over her mother's death.
"As I wrote on Twitter, I'm a human being. As a human being, I want to be open and honest, whether it's good or bad news," Richardson said in an interview with
in early July
"But it's about marijuana. The Richardson name will never be associated with anabolic steroids."
Sebastian Coe, president of athletics federation World Athletics, supports the new assessment of cannabis.
"It's a good time to take a closer look," he said during the Tokyo Games.
"That seems sensible to me, because nothing is set in stone. You adapt and re-evaluate every now and then."
Cannabis will remain on the list of banned substances in any case next year.