It’s important to read the study, not just the headline.
They treated rodents with ketamine. Then they gave some of them chlorpromazine, and some this extract.
Then they killed them and dissected their amygdala.
The rodents in the extract group had more normal amygdala.
They did not test the rodents behaviorally.
Anyway it’s worth examining this compound to see why it has the effects it does, and if it could help people, but the study does NOT say it is more effective than antipsychotics except in one measurement of the brain, in rats, in ketamine models.
Maybe if you have ketamine induced psychosis though.