The cities of Cambridge and Somerville have taken steps this year toward decriminalizing psychedelics, as some medical experts point to evidence that they may provide relief from certain mental health conditions when used under medical direction. Where does the science stand? In for Jim Braude, Adam Reilly was joined by Dr. Jerry Rosenbaum, the director of both the Center for Anxiety and Traumatic Stress Disorders at Massachusetts General Hospital and the hospital’s new Center for the Neuroscience of Psychedelics, and Bertha Madras, professor of psychobiology at Harvard University, director of McLean Hospital’s Laboratory of Addiction Neurobiology and a former deputy drug czar in the White House’s Office of National Drug Control Policy.