EXHIBIT 4 [COCENSYS LOGO] August 12, 1999 Dear Stockholder: We are pleased to inform you that on August 5, 1999, the Company entered into an agreement and plan of merger (the "Merger Agreement") providing for the acquisition of the Company by Purdue...Cocensys Inc • August 12th, 1999 • Pharmaceutical preparations
EXHIBIT 5 [COCENSYS LOGO] August 12, 1999 Dear Option Holder: We are pleased to inform you that on August 5, 1999, the Company entered into an agreement and plan of merger (the "Merger Agreement") providing for the acquisition of the Company by Purdue...Cocensys Inc • August 12th, 1999 • Pharmaceutical preparations
