In addition to being his supposedly last theatrical film director Steven Soderbergh, for a while, would have you believe “Side Effects” could be his best—a complex thriller about psychiatric drugs—only to lose its focus almost entirely and make you wish screenwriter Scott Z. Burns took a shot of Ritalin. Martin and Emily (Channing Tatum and Rooney Mara) are a New York couple with issues. He has just been released from prison for insider