- Abbott
- Adams Respiratory Therapeutics
- Alcon
- Allergy Therapeutics
- Aperon
- Alkermes
- Altana
- Alza Pharmaceuticals
- Ascent Pediatrics
- Astra Merck
- Astra USA
- Baker-Norton
- Barr Research Labs
- Bayer
- Boehringer Ingelheim
- Bristol-Myers Squibb
- Chiesi
- Clay Park Lars
- Ciba Geigy
- Dey Laboratories
- Dura
- Dura Med Research
- Epigenesis
- Fisons
- Forest
- G.D. Searle
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- Genentech
- Glaxo SmithKline
- Hoffman LaRoche
- Inspire
- IVAX (TEVA)
- Janssen
- Kikkoman
- Marion Merrell Dow
- McNeil Consumer
- Map Pharmaceuticals
- Miles
- Muro
- Novartis
- ONO Pharma USA
- Organon
- Perrigo
- Pfizer
- Pharmacia & Upjohn
- Pozen
- Procter & Gamble
- Purdue Pharma
- Rhone-Poulenc Rorer
- Med Immune
- Meda
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- Novartis
- Organon
- Ortho-McNeil
- Perrigo
- Pfizer Labs
- Pharmanex
- Pozen
- Procter & Gamble
- Purdue Pharma LP
- Sankyo
- Sanofi Aventis
- Schering-Plough
- Sepracor
- Skye Pharma
- Solvay Pharmacueticals
- Sun Pharmaceuticals
- Solvay
- Syntex
- Tap
- UCB Pharma
- Upjohn
- ViroPharma
- Wallace Laboratories
- Warner Lambert
- Whitehall Laboratories
- Whitehall
- Wyeth-Ayerst
- Zeneca
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