EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT JURISDICTION OF SUBSIDIARY INCORPORATION - ---------- --------------- AMC Regional Holdings, Inc. Delaware Dixon Pharmacy, Inc. Illinois Gatti LTC Services, Inc. Pennsylvania Nihan & Martin, Inc. Delaware Pharmacy Associates of Glens Falls, Inc. New York Pharmed Holdings, Inc. Delaware Royal Care Holdings, Inc. Delaware Specialized Patient Care Services, Inc. Alabama Sterling Healthcare Services, Inc. Delaware Williamson Drug Company, Inc. Virginia