BMO Capital analyst M. Ian Somaiya says that Neurocrine (NBIX) has been weak recently in the wake of Myovant's S-1 filing. According to the analyst, investors view Myovant's relugolix as a more convenient alternative to Neurocrine's elagolix. However, the analyst thinks that relugolix's longer half-life "could complicate add-back therapy," while the wording of the questionnaire for relugolix's Phase 3 trial increases endometriosis clinical development risk. Additionally, the analyst says that Neurocrine's elagolix has a two to three year lead time over relugolix, setting the stage for both drugs to do well. He keeps a $66 price target and Outperform rating on Neurocrine.