Opiant Pharmaceuticals Licenses Novel CB-1 Receptor Antagonist for Treatment of Acute Cannabinoid Overdose from Sanofi

December 26, 2018 GMT

SANTA MONICA, Calif., Dec. 26, 2018 (GLOBE NEWSWIRE) -- Opiant Pharmaceuticals, Inc. (NASDAQ: OPNT), a specialty pharmaceutical company developing medicines for addictions and drug overdose, today announced that it has entered into an exclusive global licensing agreement with Sanofi (NYSE:SNY) for the development and commercialization of drinabant for the treatment of acute cannabinoid overdose (ACO). Opiant intends to develop drinabant, a cannabinoid CB-1 receptor antagonist, as an injectable for administration in an emergency department setting.

ACO is most frequently linked to the ingestion of “edibles” containing large quantities of D9-tetrahydrocannabinol (THC) and synthetic cannabinoids (“K2” and “spice”) that are more potent and less expensive than marijuana. Edibles, sold as brownies, cookies and candies, pose particular risks for children, who often consume these by accident. Based on 2014 rates from the National Emergency Department sample and United States Census Bureau figures, we estimate that ACO resulted in more than one million emergency department visits in the United States in 2016. With an increasing number of states legalizing marijuana for personal and recreational use, ACO rates are expected to rise. Symptoms of ACO produced by edibles and synthetic cannabinoids can include panic and anxiety, feelings of paranoia, agitation, visual and auditory hallucinations, and nausea. These symptoms often require emergency medical attention and can take six or more hours to resolve (Winstock, et al., J Psychopharmacology 2015). There are currently no approved treatments for ACO.


In a previous clinical study conducted by Sanofi in collaboration with the Centre for Human Drug Research, oral administration of drinabant was shown to block both subjective and objective effects of inhaled THC. However, oral drinabant’s slow onset of action creates the need for an injectable version that can rapidly reverse the symptoms of ACO in an emergency situation. There is an extensive safety database with oral drinabant, generated in Sanofi’s previous research and development program, including multiple Phase 1 and 2 studies.

“This agreement with Sanofi is indicative of our leadership and commitment to developing best-in-class treatments for addictions and drug overdose,” said Roger Crystal, M.D., Chief Executive Officer of Opiant. “We are encouraged by both the safety profile of drinabant, as well as the potential of an injectable CB-1 antagonist to rapidly reverse the symptoms of ACO and address a growing medical need. We intend to initiate development efforts in 2019 and commence clinical studies thereafter.”

Under the terms of the transaction, Opiant will pay Sanofi an upfront fee of $500,000, with any further payments contingent upon Opiant achieving certain clinical, regulatory and sales milestones. Opiant will assume all development and commercial responsibilities related to drinabant.


About Opiant Pharmaceuticals, Inc.Opiant Pharmaceuticals, Inc. is a specialty pharmaceutical company developing pharmacological treatments for addictions and drug overdose. National Institute on Drug Abuse, a division of the National Institutes of Health, describes addictive disorders as chronic relapsing brain diseases which burden society at both the individual and community levels. With its innovative opioid antagonist nasal delivery technology, Opiant is positioned to become a leader in these treatment markets. Opiant’s first drug overdose product, NARCAN® Nasal Spray, is approved for marketing in the U.S. and Canada by its commercialization partner, Adapt Pharmaceuticals, now owned by Emergent BioSolutions, Inc. For more information visit: www.opiant.com. Forward-Looking StatementsThis press release contains forward-looking statements. These statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our or our industry’s actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed, implied or inferred by these forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “could,” “would,” “expects,” “plans,” “intends,” “anticipates,” “believes,” “estimates,” “predicts,” “projects,” “potential,” or “continue” or the negative of such terms and other comparable terminology. These statements are only predictions based on our current expectations and projections about future events. You should not place undue reliance on these statements. Actual events or results may differ materially. In evaluating these statements, you should specifically consider various factors. These and other factors may cause our actual results to differ materially from any forward-looking statement. We undertake no obligation to update any of the forward-looking statements after the date of this press release to conform those statements to reflect the occurrence of unanticipated events, except as required by applicable law.

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