Exhibit 21
Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
AESCA Chemisch Pharmazeutische Fabrik GmbH		Austria
American Image Productions, Inc.		Tennessee
American Scientific Laboratories, Inc.		Delaware
Aquaculture Holdings Limited (UK)		United Kingdom
Aquaculture Vaccines (Ireland) Limited		United Kingdom
Aquaculture Vaccines Limited (UK)		United Kingdom
Ark Products Limited		United Kingdom
AVL Holdings Limited (UK)		United Kingdom
Avondale Chemical Co., Ltd.		Ireland
Bain de Soleil Company, The		Delaware
Beneficiadora e Industrializadora S.A. de C.V.		Mexico
Brazil Holdings Ltd.		Bermuda
Canji, Inc.		Delaware
Chemibiotic (Ireland) Limited		Ireland
Colombia Veterinary Holdings, Inc.		Panama
Coopers Animal Health Limited		United Kingdom
Coopers Brasil Ltda.		Brazil
Coppertone Corporation, The		Florida
Dashtag		United Kingdom
Desarrollos Farmaceuticos Y Cosmeticos S.A.		Spain
DNAX Research Institute of Molecular & Cellular Biology, Inc.		California
Douglas Industries, Inc.		Delaware
Dr. Scholl's Foot Comfort Shops, Inc.		Delaware
Essex (Taiwan) Ltd.		Taiwan
Essex Chemie A.G.		Switzerland
Essex Farmaceutica Portuguesa, Lda		Portugal
Essex Farmaceutica S.A.		Colombia
Essex Italia S.p.A.		Italy
Essex Pharma GmbH		Germany
Essex Pharmaceuticals, Inc.		Philippines
Essexfarm S.A.		Ecuador
Farmaceutica Essex, S.A.		Spain
Garden Insurance Co., Ltd.		Bermuda
Giralda Investments Ltd.		Switzerland
Global Animal Management Inc.		Delaware
Integrated Therapeutics Group, Inc.		Delaware
Key Pharma		Russia
Key Pharma S.A.		Ecuador
Key Pharma S.A.		Argentina
Key Pharma, A.G.		Switzerland
Key Pharma, S.A.		Spain

Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
Key Pharmaceuticals Export Co., Inc.		U.S. Virgin Islands
Key Pharmaceuticals, Inc.		Florida
Kirby Medical Products Cia Ltda		Chile
Kirby-Warrick Pharmaceuticals Limited		United Kingdom
Kirby Pharmaceutical S.A.		Spain
Laboratorio Essex, C.A.		Venezuela
Laboratorio S.P. White's, C.A.		Venezuela
Laboratorios Essex S.A.		Argentina
Laboratorios Kirby S.A.		Argentina
Loftus Bryan Chemicals Limited		Ireland
Macol, S.A.		Colombia
MedAdvisor, Inc.		Delaware
Medexa, S.A. de C.V.		Mexico
Med-Nim (Proprietary) Limited		South Africa
MSP Technology LLC		Delaware
P.T. Schering-Plough Indonesia		Indonesia
Pharmaceutical Supply Corporation		Delaware
Pharmaco (Canada) Inc.		Canada
Pharmaco, Inc.		Delaware
Plough (Australia) Pty. Limited		Australia
Plough (UK) Limited		United Kingdom
Plough Benelux S.A.		Belgium
Plough Broadcasting Co., Inc.		Delaware
Plough Consumer Products (Asia) Ltd.		Hong Kong
Plough Consumer Products (Philippines) Inc.		Philippines
Plough de Venezuela, C.A.		Venezuela
Plough Export, Inc.		Tennessee
Plough Farma, Lda. (Portugal)		Portugal
Plough France S.A.		France
Plough Hellas Limited		Greece
Plough Laboratories, Inc.		Tennessee
Plough S.p.A.		Italy
PPL, Inc.		Tennessee
Pro Medica AB		Sweden
Professional Pharmaceutical Corporation		Delaware
Scheramex S.A. de C.V.		Mexico
Scherico, Ltd.		Switzerland
Schering Canada Inc.		Canada

Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
Schering Corporation		New Jersey
Schering Institutional Sales Corporation		Delaware
Schering Laboratories Advertising Inc.		Delaware
Schering MSP Corporation		Nevada
Schering MSP Pharmaceutical LP		Nevada
Schering MyHealth Solutions, Inc.		Delaware
Schering Plough (South Korea)		South Korea
Schering Sales Corporation		Delaware
Schering Sales Management, Inc.		Nevada
Schering Transamerica Corporation		New Jersey
Schering-Plough (Proprietary) Limited		South Africa
Schering-Plough A/S		Norway
Schering-Plough A/S		Denmark
Schering-Plough AB		Sweden
Schering-Plough Animal Health Limited		Ireland
Schering-Plough Animal Health Limited		New Zealand
Schering-Plough Animal Health Limited		Australia
Schering-Plough Animal Health Limited		Thailand
Schering-Plough Animal Health Operations Sdn Bhd		Malaysia
Schering-Plough Animal Health Sdn Bhd		Malaysia
Schering-Plough Animal Health, Inc.		Philippines
Schering-Plough Animal-Health Corporation		Delaware
Schering-Plough B.V.		Netherlands
Schering-Plough C.A.		Venezuela
Schering-Plough Central East A.G.		Switzerland
Schering-Plough China, Ltd.		Bermuda
Schering-Plough Compania Limitada		Chile
Schering-Plough Coordination Center N.V./S.A.		Belgium
Schering-Plough Corp., U.S.A.		Delaware
Schering-Plough Corporation		Philippines
Schering-Plough del Caribe, Inc.		New Jersey
Schering-Plough del Ecuador, S.A.		Ecuador
Schering-Plough del Peru S.A.		Peru
Schering-Plough External Affairs, Inc.		Delaware
Schering-Plough Farma Lda.		Portugal
Schering-Plough Farmaceutica Ltda.		Brazil

Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
Schering-Plough HealthCare Products Advertising Corp.		Tennessee
Schering-Plough HealthCare Products Sales Corporation		California
Schering-Plough HealthCare Products, Inc.		Delaware
Schering-Plough Holdings France		France
Schering-Plough Holdings Ltd.		United Kingdom
Schering-Plough II - Veterinaria, Lda.		Portugal
Schering-Plough INT Limited		United Kingdom
Schering-Plough International Employees Inc.		Delaware
Schering-Plough International, Inc.		Delaware
Schering-Plough Investment Co., Inc.		Delaware
Schering-Plough Investments Limited		Delaware
Schering-Plough Kabushiki Kaisha		Japan
Schering-Plough Labo N.V.		Belgium
Schering-Plough Legislative Resources, L.L.C.		Delaware
Schering-Plough Limited		Iran
Schering-Plough Limited		Taiwan
Schering-Plough Limited		Thailand
Schering-Plough Limited		United Kingdom
Schering-Plough Ltd.		Switzerland
Schering-Plough N.V./S.A.		Belgium
Schering-Plough Overseas Limited		Delaware
Schering-Plough OY (Finland)		Finland
Schering-Plough Pensions Ireland Limited		Ireland
Schering-Plough Pharmaceutical Industrial and Commercial S.A.		Greece
Schering-Plough Polska Spoka		Poland
Schering-Plough Products Caribe, Inc.		Puerto Rico
Schering-Plough Products LLC		Puerto Rico
Schering-Plough Products, Inc.		Delaware
Schering-Plough Pty. Limited		Australia
Schering-Plough Real Estate Company, Inc.		Delaware
Schering-Plough Research Institute		Delaware
Schering-Plough S.A.		France
Schering-Plough S.A.		Paraguay
Schering-Plough S.A.		Panama
Schering-Plough S.A.		Dominican Republic
Schering-Plough S.A.		Argentina
Schering-Plough S.A.		Colombia
Schering-Plough S.A.		Spain

Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
Schering-Plough S.A.		Uruguay
Schering-Plough S.A. de C.V.		Mexico
Schering-Plough S.p.A.		Italy
Schering-Plough Sante Animale		France
Schering-Plough Sdn. Bhd.		Malaysia
Schering-Plough Singapore Pte. Ltd.		Singapore
Schering-Plough Singapore Research Pte. Ltd.		Singapore
Schering-Plough Tibbi Urunler Ticaret, A.S.		Turkey
Schering-Plough Veterinaire		France
Schering-Plough Veterinaria, S.A. de C.V.		Mexico
Schering-Plough Veterinary Belgium NV		Belgium
Schering-Plough Veterinary Corporation		Nevada
Schering-Plough Veterinary Ltd.		Thailand
Schering-Plough Veterinary Nederland BV		Netherlands
Schering-Plough Veternaria S.A.		Argentina
Sentipharm A.G.		Switzerland
Shanghai Schering-Plough Pharmaceutical Company, Ltd.		China
SOL Limited		Bermuda
SP Biotech, S.A.		Spain
SP Flight Operations, Inc.		Delaware
SP HealthCare Products Corp.		Delaware
SP Neurotech, S.A.		Spain
S-P RIL Limited (United Kingdom)		United Kingdom
S-P Veterinary (UK) Limited		United Kingdom
S-P Veterinary Holdings Limited		United Kingdom
S-P Veterinary Limited		United Kingdom
S-P Veterinary Pensions Limited		United Kingdom
Summit Property Company LLC, The		Delaware
Suntan Sensations, Inc.		California
Syntro Corporation		Delaware
Takeda Schering-Plough Animal Health Kabushiki Kaisha		Japan
Tasman Vaccine Laboratory (UK) Limited		United Kingdom
Technobiotic Ltd.		Australia
Trading Pharma AG		Switzerland
Undra S.A. de C.V.		Mexico
UNICET, SAS		France

Schering-Plough Corporation and Subsidiaries
Subsidiaries of the Registrant
As of December 31, 2002
	State or Country
	or Incorporation
Subsidiaries of Registrant	or Organization
Warrick Pharmaceuticals Corporation		Delaware
Warrick Pharmaceuticals Limited (United Kingdom)		United Kingdom
Werthenstein Chemie A.G.		Switzerland
White Laboratories of Canada Ltd.		Canada
White Laboratories, Inc.		New Jersey
White Pharma, S.A.		Argentina