Pfizer Pays $11.6 Billion for Drug-Maker in Its Biggest Deal Since 2016 Posted byMadeline Garfinkle May 10, 2022 Leave a comment on Pfizer Pays $11.6 Billion for Drug-Maker in Its Biggest Deal Since 2016 Pfizer announced it will buy migraine drug maker Biohaven for about $11.6 billion – in cash.