Jurors in the assault trial of a Long Island, N.Y., man will have to weigh the drastically different opinions of two Harvard-educated psychiatrists to determine whether the popular antidepressant Zoloft can trigger a violent episode.

Brandon Hampson, 39, is facing misdemeanor assault charges for allegedly beating his girlfriend and preventing her from leaving his home in August 2006 after she refused to have sex with him. Hampson claims that he was going through Zoloft withdrawal at the time and did not intend to assault the woman.