- Abbott Laboratories
- Adams Laboratories
- Advanced ChemTech
- AeroGen
- Alcon Laboratories, Inc.
- Allergan Online
- Alliance Pharmaceutical Corporation
- Almirall
- Amgen, Inc.
- Amphastar Pharmaceuticals, Inc.
- Amstelfarma (Netherlands)
- Arlington Medical Resources, Inc.
- ASAC Pharmaceutical International AIE (Spain)
- AstraZeneca LP
- Aurobindo Pharma Ltd.
- B. Braun Medical, Inc.
- Bausch & Lomb Pharmaceuticals, Inc.
- Baxter International, Inc.
- Berlex Laboratories
- Beutlich Pharmaceuticals
- Bio.com (company directory)
- Biogen
- Blaine Pharmaceuticals
- Boehringer Ingelheim
- Bristol-Meyers Squibb
- Britannia Pharmaceuticals Limited
- Caraco Pharmaceutical Laboratories, Ltd.
- Carrington Laboratories
- Cathay Herbal Laboratories (traditional Chinese medicine)
- Colgate-Palmolive Company
- Covance
- Cytogen
- Daiichi Pharmaceutical Corporation
- Daniel Pharmaceuticals
- Dendreon Corporation
- Dermik Laboratories, Inc.
- Dermolab Ltd.
- Dey Laboratories
- Dupont Pharmaceuticals Company
- Duramed Pharmaceuticals, Inc.
- Efroze Chemical Industries (Pvt.) Ltd. - Pakistan
- Eli Lilly & Co.
- Endo Pharmaceuticals
- Enzon, Inc.
- Faulding
- Ferring Pharmaceuticals
- Fleming Laboratories Limited (India)
- Forest Pharmaceuticals, Inc.
- Forum (Holdings) Ltd. - United Kingdom
- Fougera
- G&W Laboratories Inc.
- Galderma Laboratories Inc.
- Gebauer Company
- Genentech, Inc.
- Genzyme
- Geron Corporation
- Gilead Sciences
- GlaxoSmithKline
- G.C. Hanford Mfg. Co.
- Henry Schein Inc.
- Hovione
- Horizon Diagnostics, Inc.
- Hovid Sdn Bhd - Malaysia
- IBSA - Institut Biochimique SA - Switzerland
- ImmunoGen, Inc.
- Incyte Pharmaceuticals, Inc.
- International Medication Systems, Ltd. (IMS)
- Ionis Pharmaceuticals
- Janssen Pharmaceutica
- Jenapharm - Denmark
- Johnson & Johnson
- King Pharmaceutical
- Konsyl Pharmaceuticals, Inc.
- Lannett Co.
- Leo Pharmaceutical Products Ltd.
- Ligand Pharmaceuticals Inc.
- Mallinckrodt
- MedImmune, Inc.
- Merck & Co.
- MerckVaccines.com
- Meridian Medical Technologies, Inc.
- Merz Inc.
- Mikart Inc.
- Mylan Pharmaceuticals, Inc.
- Nephron Pharmaceuticals Corporation
- Novartis
- Novo Nordisk Pharmaceuticals Inc.
- Oculex Pharmaceuticals
- Otsuka America Pharmaceutical Inc.
- Paddock Laboratories, Inc.
- Parnell Pharmaceuticals
- Patheon
- PD-Rx Pharmaceuticals
- Perrigo
- Pfizer Inc.
- Pharmaceutical Specialties, Inc.
- Pharmacyclics
- Pharmacia
- Pharmascience
- Protein Design Labs
- Purdue Pharma L.P, Purdue Frederick Company
- Roche Laboratories
- Roxane Laboratories, Inc.
- RxHope
- Sankyo Co., Ltd. - Japan
- Sanochemia Pharmazeutika AG - Germany
- Schein Pharmaceutical
- Schering-Plough
- Shire Pharmaceuticals Group plc
- SICOR, Inc.
- Sifi Ophthalmic Pharmaceuticals (Italy)
- Sigma-Aldrich
- Sigma-Tau
- Solvay Pharmaceuticals
- Sonus Pharmaceuticals
- Steraloids, Inc.
- Stratus Pharmaceuticals, Inc.
- Synthon BV - Netherlands
- Takeda Pharma GmbH - Denmark
- Takeda Pharmaceuticals America, Inc.
- Taro Pharmaceutical Industries, Ltd.
- Teva Pharmaceuticals USA
- United-Guardian, Inc.
- Upsher-Smith Laboratories, Inc.
- Vertex Pharmaceuticals
- Xoma
- Zila, Inc.