More declines in health care stocks are pulling indexes lower on Wall Street, the AP reports. Biotechnology companies continued to fall Thursday as pressure mounts on them over their drug pricing practices. Allergan fell 3% and Celgene lost 2%. Mylan, which has been under fire for steep price increases in its EpiPen product, lost 1%. Dollar General plunged 18% after its results fell short of analysts' forecasts. The Dow Jones industrial average fell 33 points, or 0.2%, to 18,448. The Standard & Poor's 500 index gave up 3 points, or 0.1%, to 2,172. The Nasdaq composite edged down 5 points, or 0.1%, to 5,212. Bond prices fell. The yield on the 10-year Treasury note rose to 1.58%. (More Dow Jones stories.)