Ever growing Plavix and Lipitor sales encountered challenges.

Plavix, an anti-arteriosclerosis by Sanofi-Aventis and Lipitor, an anti-cholesterol drug by BMS Korea and Pfizer Korea, have enjoyed with ever growing sales in the market since long time but recently encountered with challenges by a market entry of those generic drugs including Dong-A's Plavitol, which may slow their almost non-stop running stances.

Plavix showed almost 200 billion won of it...