Thursday's Health Winners & Losers

AtheroGenics (AGIX Quote) rose 14% as the company continued to recover from a big loss to start the week. On Monday, its shares tumbled roughly 60% after its heart disease drug failed to meet the main target of a phase III trial. The stock was recently adding 45 cents to $3.67.

Adams Respiratory Therapeutics (ARXT Quote) was also surging after the company said it has settled a patent lawsuit over a generic version of Mucinex with Mutual Pharmaceutical and United Research Laboratories. Recently, Adams was climbing $5.17, or 16.8%, to $36.01.

On the downside, Avalon Pharmaceuticals (AVRX Quote) dropped 5.1% after the drugmaker's fourth-quarter loss swelled from the same quarter in the previous year. The stock was off 24 cents at $4.48.

Elsewhere, JPMorgan reduced both GlaxoSmithKline (GSK Quote) and AstraZeneca (AZN Quote) to underweight from neutral. GlaxoSmithKline was off 1.4% at $55.44, and AstraZeneca was down 1.3% at $55.95.

Also on the move, ISIS Pharmaceuticals (ISIS Quote) was up 7.6% at $10.32. ImClone Systems (IMCL Quote) was rising 4.2% at $34. Nektar Therapeutics (NKTR Quote) was gaining 2.4% to $12.44.

Among decliners, Celgene (CELG Quote) was off 2.2% at $53.42. St. Jude Medical (STJ Quote) was recently down 1% to $37.99.