SAN DIEGO--(BUSINESS WIRE)--Jan. 6, 2006--AVANIR Pharmaceuticals (AMEX: AVN) announced today that its Board of Directors has approved the implementation of a one-for-four reverse split of the company’s common stock. The reverse split was previously approved by the company’s shareholders at the company’s annual shareholder meeting held on March 17, 2005. AVANIR’s common stock will begin trading on a split-adjusted basis when the market opens on January 18, 2006.