A Study to Evaluate 3 Dose Levels of Luvadaxistat of Adults With Negative Symptoms of Schizophrenia

The drug being tested in this study is called luvadaxistat. Luvadaxistat is being tested to treat negative symptoms in participants who have schizophrenia. Participants will be randomly assigned (by chance, like flipping a coin) to one of the four treatment groups in the double-blind period-which will remain undisclosed to the participant and study doctor during the study (unless there is an urgent medical need): * Luvadaxistat 50 mg once daily * Luvadaxistat 125 mg once daily * Luvadaxistat 500 mg once daily * Placebo once daily