endoDublin-based drug maker Endo engaged Joele Frank for PR to back its surprise $11.2B bid for Salix Pharmaceuticals, which already inked a $10B deal to be sold to Valeant Pharmaceuticals.

Sard Verbinnen & Co. (Valeant) and Teneo Strategy (Salix) are working the PR front for the Valeant-Salix tie-up.

Endo went public with its $175-per-share, cash and stock offer March 11, pitching it as a “superior proposal” to the $158-per-share Valeant-Salix deal, which is all cash.

Valeant responded to the Endo entry by re-affirming its commitment to the deal, adding that it “expects to be in a position to close” its tender offer on April 1.

Endo and Valeant are after Salix’ profitable irritable bowel syndrome treatments like Uceris and Xifaxan.

The Wall Street Journal, citing Dealogic data, reported that the pharmaceutical sector saw $268B in M&A activity last year.