A pharmaceutical nonprofit was granted priority review from the Food and Drug Administration to make an inexpensive overdose-reversal drug for use without a prescription. 

Harm Reduction Therapeutics Inc. said its 3 milligram nasal spray naloxone formulation, called Rivive, had three times higher concentration in the blood of 36 participants than naloxone delivered as a shot. The company said Monday that the FDA gave it a target approval date of April 28. The FDA declined to comment.

HRT said it would give away one-tenth of its product and sell the rest to pharmacies, public-sector employees and groups that work with drug users at-cost, about $18 a dose. HRT said it plans to produce 2 million doses a year.