A lawyer for the basketball player presented a court with a letter from a doctor suggesting she use cannabis to treat her pain.
The two-time Olympic gold medal winner and star for the Phoenix Mercury was arrested at Moscow's Sheremetyevo Airport in February after customs officials found cannabis oil in her luggage. She could face up to 10 years in prison if found guilty of transportation of drugs.
In court last week, she acknowledged possession of the canisters but said she had no criminal intent and that the canisters' presence was due to haste. In Russia, admitting guilt doesn't mean the trial is over.
Her court sessions have focused on her good character and athletic prowess since she pleaded guilty.
Lawyer Maria Blagovolina said that the doctor gave the recommendation for the use of medical cannabis. Permission was given by the Arizona Department of Health.
The tests she underwent as part of the anti-doping check did not detect any banned substances.
The next hearing was in July.
In the hearings that took place yesterday and today, it was clear that there was a lot of respect and admiration for Miss Griner in both the United States and Russia, where she has been playing basketball for seven years, not only for her professional achievements, but also for her character and integrity
The director and team captain testified on her behalf in front of the legislature.
President Joe Biden and Secretary of State Antony Blinken have said they are doing everything they can to win her release, as well as that of other Americans.
Washington doesn't have a lot of leverage with Moscow because of their dislike for each other.
Russian media have speculated about a swap for Russian arms trader Viktor Bout, who is serving a 25-year sentence in the U.S. after being convicted of conspiracy to kill U.S. citizens.
Russia has been trying to get Bout's release for a long time. Such a trade is notpalatable to Washington because of the wide discrepancy in seriousness of their cases. The U.S. has described the espionage conviction of the man as a setup, and others have suggested that he could be traded with another man.
The government's chief hostage negotiator, the special presidential envoy for hostage affairs, is in charge of her case after the State Department designated her as wrongly imprisoned. Russia has been annoyed by the classification.
There are no formal or procedural reasons to discuss any further steps until her trial is over, according to the deputy foreign minister.
It is hard to engage in detailed discussion of any possible exchanges because of the U.S. criticism.
The trial could last months, according to the authorized detainer. It is expected to conclude by the beginning of August according to the lawyers.