Lipitor, the cholesterol-lowering treatment, remains the best-selling drug in America. But Pfizer, the drug's maker, is facing renewed competition from biotechs like Amgen that were hardly on the map a decade ago-- and renewed threats from cheap generic drugs.
1.
LIPITOR - Treats: High cholesterol - Pfizer - $8.4 billion
2.
ZOCOR - Treats: High cholesterol - Merck - $4.4 billion (2005 sales)
3.
NEXIUM - Treats: Heartburn - AstraZeneca - $4.4 billion
4.
PREVACID - Treats: Heartburn - Abbott & Takeda - $3.8 billion
5.
ADVAIR DISKUS - Treats: Asthma - GlaxoSmithKline - $3.6 billion
6.
PLAVIX - Treats: Heart disease - Bristol-Myers Squibb & Sanofi-Aventis - $3.5 billion
7.
ZOLOFT - Treats: Depression - Pfizer - $3.1 billion
8.
EPOGEN - Treats: Anemia - Amgen - $3.0 billion
9.
PROCRIT - Treats: Anemia - Johnson & Johnson - $3.0 billion
10.
ARANESP - Treats: Anemia - Amgen - $2.8 billion
This list does not necessarily reflect the most used, most effective or most highly rated drugs but just the best selling drugs in the past few years.
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