When switching JAK inhibitors for myelofibrosis, Aaron Gerds, MD, MS, advises stopping ruxolitinib and starting the new JAK inhibitor the next day due to its short half-life, though tapering ruxolitinib over 1 week is recommended for patients on higher doses to avoid rebound symptoms; pacritinib and fedratinib have longer half-lives so a 1-week washout can be considered.