1 EXHIBIT 4.3 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement"), dated as of December 10, 1997 by and among OMNICARE, INC., a Delaware corporation (the "Company") and MORGAN STANLEY & CO. INCORPORATED, CREDIT SUISSE...Registration Rights Agreement • February 6th, 1998 • Omnicare Inc • Retail-drug stores and proprietary stores • New York
