EXHIBIT 21 Subsidiaries of AmeriSource Distribution Corporation As of December 1, 1994, the subsidiaries of AmeriSource Distribution Corporation, together with their respective jurisdictions of incorporation, were as follows: Subsidiary Jurisdictions of Incorporation ---------- ------------------------------ AmeriSource Corporation Delaware Subsidiaries of AmeriSource Corporation As of December 1, 1994, the subsidiaries of AmeriSource Corporation, together with their respective jurisdictions of incorporation, were as follows: Subsidiary Jurisdictions of Incorporation ---------- ------------------------------ AmeriSource Receivables Corporation Delaware Health Services Capital Corporation Delaware Health Services Plus, Inc. Delaware