EXHIBIT 10.1 March 22, 1999 AVANIR Pharmaceuticals, Inc. 9393 Towne Center Drive, Suite 200 San Diego, California 92121 Attention: Gregory P. Hanson RE: CLASS A COMMON STOCK INVESTMENT AGREEMENT Dear Mr. Hanson: We refer to the Class A Common Stock...Class a Common Stock Investment Agreement • April 1st, 1999 • Avanir Pharmaceuticals • Pharmaceutical preparations
