With the $160-billion Pfizer-Allergan merger announcement last week, Pfizer's chairman and CEO, Ian Read, can breathe at least one sigh of relief for getting the tax-inversion opportunity he was seeking—and was denied&ampmdash;when AstraZeneca rejected Pfizer's bid last year. Even absent the expected political scrum, in a US election year, over the propriety of shifting a key US pharma company to overseas headquarters (Allergan is based in Dublin, Ireland), the acquisition is expected to take more than six months to finalize. Allergan itself is in the final stages of a $40.5-billion divestiture of much of its generic assets to Teva Pharma—and that is expected to close in Q1 2016. Pfizer and Allergan noted that there will be a pipeline of "more than 100 mid-to-late stage" drugs in development at the combined company.