A court in Dublin has considered Perirrgo's challenge to Ireland tax authorities' ’ 2018 order to pay $1.9bn additional taxes from its 2013 acquisition of Elan that established it as an Irish firm. “We're just probably within 6 months now that we should get some kind of an answer in that regard,” says CEO Murray Kessler.

Perrigo "walked away a little bit" from "a model that worked beautifully," says CEO Murray Kessler at investor conference, "In essence, all we've done over the last year is to put back in place the model that worked so well."

IRS tax assessment for 2013, the year Perrigo acquired Dublin-based Elan, adds another cloud to OTC private label giant's outlook as it prepares to present plans for accelerating growth for its long-slumping consumer health business in the US and Europe at a March 9 investor day conference. Perrigo shares dropped more than 9% in early trading after IRS notice became known to investors before inching upward and ending at $47.92, down 6.8% from the previous day's close.