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

Allergan fell $1.62 or 1.0 percent, to $164.00.

Baxter International Inc. fell $.61 or .8 percent, to $74.36.

Boston Scientific Corp. rose $.11 or .8 percent, to $12.70.

Johnson & Johnson fell $.19 or .2 percent, to $99.71.

Medtronic rose $.54 or .9 percent, to $62.02.

St. Jude Medical Inc. rose $.13 or .2 percent, to $65.37.

Stryker rose $.45 or .6 percent, to $80.45.

Zimmer Holdings Inc. fell $.24 or .2 percent, to $99.37.