Craig M. Audet has been appointed senior vice president of operations and head of global regulatory affairs at Arena Pharmaceuticals. Mr. Audet will also serve as an executive officer of the company.   Mr. Audet will oversee various operations, including investor relations and alliance management, and will continue to lead regulatory affairs. He joined the company in April 2011 as vice president of regulatory affairs, and has led interactions with the FDA and EMA for Belviq, an adjunct to a redu...