SANTA MONICA, Calif., Feb. 08, 2021 (GLOBE NEWSWIRE) -- Opiant Pharmaceuticals, Inc. (“Opiant”) (NASDAQ: OPNT) today announced the dosing of the first patient in a confirmatory pharmacokinetic (“PK”) study for OPNT003, nasal nalmefene, for the treatment of opioid overdose. Results from the study are anticipated June 2021.