Key Takeaways AbbVie will pay up to $1.2B to acquire rights to bretisilocin from Gilgamesh.Bretisilocin showed rapid and durable antidepressant effects in phase II studyAbbVie continues neuroscience deal spree to strengthen its early-stage pipeline.AbbVie (ABBV) has announced a deal with private neuroscience biotech, Gilgamesh Pharmaceuticals, to acquire the latter’s lead pipeline candidate, bretisilocin (GM-2505), a novel therapy being developed for treating major depressive disorder(MDD).Gilgamesh is curr ...