- 3M
- Abbott Laboratories
- Agouron Pharmaceuticals, Inc.
- Allergan
- Alliance Pharmaceutical Corp.
- Almirall
- Alpharma
- ALZA Corporation
- Amersham International plc
- AMGEN
- AMRAD
- Amstelfarma
- Amylin
- ARIAD Pharmaceuticals, Inc.
- Aronex Pharmaceuticals, Inc.
- Arris Pharmaceutical
- ASAC Pharmaceutical International, AIE - Europe
- Astra
- Astra Merck
- Atlantic Pharmaceuticals, Inc.
- Azupharma GmbH
- Barr Laboratories, Inc.
- BASF
- Bayer
- Bayer US
- Bayer Managed Care Site
- Baxter International Inc.
- Berlex Laboratories
- Beximco
- Biogen
- Biorex
- Boehringer Ingelheim
- Bristol-Myers Squibb
- Britannia Pharmaceuticals Limited
- Chugai Biopharmaceuticals, Inc.
- Chugai Pharmaceutical Co. Ltd.
- Ciba-Geigy AG
- Cibavision UK
- Connaught
- CP Pharmaceuticals
- Dimethaid Research Inc.
- Dura Pharmaceuticals
- Eli Lilly and Company
- Elpen Pharmaceutical
- Fischer Pharmaceuticals Ltd.
- Fougera
- Fujisawa USA
- Genentech, Inc.
- Genetics Institute, Inc.
- Glaxo Wellcome
- Groupement Provincial de l'Industrie du Médicament
- Ho Yan Hor
- Hoechst
- Hoechst Marion Roussel (Europe)
- Hoechst Marion Roussel (US)
- Hoechst Marion Rousell - International
- IBSA
- Immunex
- Immunoscience
- ISF SpA
- Isis Pharmaceuticals
- Jenapharm
- Johnson & Johnson
- Medeva PLC
- Medicis
- Merck & Co.,Inc.
- Merind Limited
- Mochida Pharmaceutical Co., Ltd.
- Monsanto
- Mylan Laboratories, Inc.
- Novartis
- Novo Nordisk
- Ohmeda
- Organon Teknika
- Otsuka Pharmaceutical Corp.
- Parke-Davis
- Peptech Limited
- Pfizer
- Pharmacia & Upjohn
- Pharmacyclics
- Proctor & Gamble
- PT Darya-Varia Laboratoria
- R & D Laboratories
- Research Triangle Pharmaceuticals - RTP
- Rhone Poulenc
- Roche
- Roxane Laboratories, Inc.
- Sandoz
- Sankyo Co., Ltd.
- Sano Corporation
- Sanochemia Group
- Sanofi
- Scandipharm, Inc.
- Schering Plough
- Schering-Plough Italia
- Schwarz Pharma
- Searle
- SmithKline Beecham
- Solka Laboratories Inc.
- Solvay
- Sparta Pharmaceuticals, Inc.
- Synthon BV
- Taiwan Panbiotic Laboratories Co., Ltd.
- Takeda Pharmaceutical Industries Ltd.
- Taro Pharmaceutical Industries Ltd.
- Texas Biotechnology Corporation
- UCB
- Vectorpharma
- Vertex Pharmaceutical
- Warner-Lambert
- Xoma
- Zeneca
- Zila, Inc.