The top selling drugs in the United States in 2003, their annual sales, what it treats and its manufacturer. The 2003 data is the most recent audited figures available. 1. Lipitor, $6.8 billion, cholesterol, Pfizer Inc., 2. Zocor, $4.4 billion, cholesterol, Merck & Co.,3. Prevacid, $4.0 billion, heartburn, TAP Pharmaceutical Products Inc.,4. Procrit, $3.3 billion, anemia, Johnson & Johnson,5. Zyprexa, $3.2 billion, mental illness, Eli Lilly & Co.,6. Epogen, $3.1 billion, anemia, Amgen Inc.,7. Nexium, $3.1 billion, heartburn, Merck & Co.,8. Zoloft, $2.9 billion, depression, Pfizer Inc.,9. Celebrex, $2.6 billion, arthritis, Pfizer Inc.,10. Neurontin, $2.4 billion, epilepsy, Pfizer Inc.,11. Advair Diskus, $2.3 billion, asthma, GlaxoSmithKline PLC,12. Plavix, $2.2 billion, blood clots, Bristol-Myers Squibb Co.,13. Norvasc, $2.2 billion, high blood pressure, Pfizer Inc.,14. Effexor XR, $2.1 billion, depression, Wyeth,15. Pravachol, $2.0 billion, cholesterol, Bristol-Myers Squibb Co.,16. Risperdal, $2.0 billion, mental illness, Johnson & Johnson,17. Oxycontin, $1.9 billion, pain, Purdue Pharma,18. Fosamax, $1.8 billion, osteoporosis, Merck & Co.,19. Protonix, $1.8 billion, gastrointestinal reflux disease, Wyeth,20. Vioxx, $1.8 billion, arthritis, Merck & Co.
