WASHINGTON — Federal health regulators on Thursday approved the first hard-to-abuse version of the painkiller hydrocodone, offering an alternative to a similar medication that has been widely criticized for lacking such safeguards. The Food and Drug Administration approved Purdue Pharma’s Hysingla ER for patients with severe, round-the-clock pain that cannot be managed with other treatments. […]

NIH-funded clinical trials would have to summarize study results within a year of completion.