In the Biohaven Pharmaceutical Holding Co. Ltd. and Pfizer Inc. collaboration to commercialize Nurtec ODT (rimegepant) outside the U.S., Biohaven will receive tiered double-digit royalties on ex-U.S. net sales as well as milestone payments of up to $1.24 billion. The target: more than 1 billion migraine sufferers worldwide with lots of clinical competition.