Shares of some top medical devices companies are mixed at 1 p.m.:

Allergan fell $1.44 or .9 percent, to $165.01.

Baxter International Inc. rose $.43 or .6 percent, to $74.20.

Boston Scientific Corp. fell $.04 or .3 percent, to $12.56.

Johnson & Johnson rose $.37 or .4 percent, to $103.73.

Medtronic rose $.54 or .8 percent, to $64.45.

St. Jude Medical Inc. rose $.17 or .3 percent, to $65.75.

Stryker rose $.51 or .6 percent, to $83.63.

Zimmer Holdings Inc. rose $1.12 or 1.1 percent, to $100.41.