1. Bayer
2. Roche
3. Pfizer
4. Novartis
5. Johnson & Johnson
6. GlaxoSmithKline
7. Sanofi-Aventis
8. Schering AG
9. Boehringer Ingelheim
10. AstraZeneca
* By
the number of European visitors.
Source: Cybercitizen Health Europe v8.0, Manhattan Research, LLC