| Top 10 Therapeutic Drug Classes by U.S. Prescription Sales, 2003 | ||
| Sales ($B) | Growth | |
| Cholesterol reducers | $13.9 | 10.9% |
| Proton pump inhibitors | 12.9 | 12.6 |
| SSRI/SNRI | 10.9 | 11.9 |
| Anti-psychotics | 8.1 | 22.1 |
| Erythropoietins | 7.4 | 16.3 |
| Anti-seizure | 6.9 | 24.4 |
| Anti-arthritics (COX-2) | 5.3 | 9.1 |
| Ca+ channel blockers | 4.4 | -0.5 |
| Anti-histamines | 3.5 | -28.3 |
| TOTAL | $76.5 | 10.5% |
| Source: IMS Health | ||