Relmada Therapeutics Announces Top-Line Results of Study Evaluating REL-1017 vs Oxycodone for Abuse Potential

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07/30/2021

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Relmada Therapeutics, Inc. (Nasdaq: RLMD), a late-stage biotechnology company addressing diseases of the central nervous system (CNS), announced today top-line results of the human abuse potential (HAP) study with REL-1017, a novel NMDA receptor (NMDAR) channel blocker and the company's lead candidate in Phase 3 development for the treatment major depressive disorder (MDD).  

Top-line results showed that all three doses of REL-1017 (25 mg, 75 mg, and 150 mg, the therapeutic, supratherapeutic, and maximum tolerated doses, respectively) tested in recreational opioid users, demonstrated a highly statistically significant difference vs. the active control drug, oxycodone 40 mg.   The study's primary endpoint was a measure of "likability" with the subjects rating the maximum effect (or Emax) for Drug Liking "at the moment", using a 1=100 bipolar rating scale (known as a visual analog scale or VAS), with 100 as the highest likability, 50 as neutral (placebo-like), and 0 the highest dislike. Results are summarized in the table below.

 

Placebo

REL-1017

25 mg

REL-1017

75 mg

REL-1017

150 mg

Oxycodone

40 mg

Mean Emax for Drug Liking

51.7

53.0

58.2

64.9

85.0

P-value for Difference vs. oxycodone 40 mg

<0.001

<0.001

<0.001

<0.001

-

"These highly statistically significant data clearly demonstrate a very meaningful difference between REL-1017 and oxycodone at all three tested doses" said Sergio Traversa, CEO of Relmada Therapeutics.  "These results, along with previously published literature, confirm the lack of opioid effects of REL-1017. We look forward to the continued clinical development of REL-1017 as a novel, safe, and rapidly effective treatment for MDD."

"We are pleased with the results of this confirmatory study, which was designed in line with U.S. Food and Drug Administration (FDA) guidance," said Dr. Paolo Manfredi, Chief Scientific Officer of Relmada. "Importantly, these data are consistent with our development program and confirm the extensive body of literature indicating the lack of abuse potential of REL-1017. Patients suffering from depression are in great need of new safe and rapidly effective treatments. These results strongly support the ongoing REL-1017 late-stage development program."

"These results are consistent with HAP results we have seen for other drugs that affect the CNS, and which have been Scheduled at Classes IV or V, or even unscheduled, during the assessment and review period," said Jack Henningfield, Ph.D., Vice President, Research, Health Policy, and Abuse Liability at Pinney Associates and former Chief of the Clinical Pharmacology Research Branch and the Abuse Potential and Biology of Dependence Assessment Section of the National Institute on Drug Abuse (NIDA).  "These data do not provide evidence for abuse potential."

Conference Call and Webcast Information

Relmada will host a conference call and webcast presentation today, July 27, 2021, at 8:30 AM Eastern Time to discuss the study results, which can be accessed with the information below:

Domestic:         

877-407-0792

International:     

201-689-8263

Conference ID:    

13721997

Webcast:           

http://public.viavid.com/index.php?id=145999

The subsequent archived recording will be available on the Investors section of the Relmada website at www.relmada.com.

Background

REL-1017 (which is also known as esmethadone, dextromethadone, or d-methadone), is the opioid-inactive, dextro-, or right-side isomer of racemic methadone. Prior preclinical and clinical findings have indicated that the dextro-isomer REL-1017 lacks the addiction liability and respiratory depressant effects of its parent molecule. In contrast, levomethadone, the left-side isomer, is an opioid agonist and is entirely responsible for the analgesic activity of the parent molecule.1

Human Abuse Potential (HAP) studies are conducted to evaluate the likelihood that a medicine affecting the central nervous system may be abused by patients or the general public. The study comparing REL-1017 to oxycodone is the first of two clinical trials to assess abuse potential per FDA guidance as part of the planned REL-1017 NDA for the treatment of MDD. 

The scheduling of a drug depends on the analysis of several parameters (receptor studies, animal studies, human studies, history of abuse). These parameters are generally referred to as the "eight-factor analysis".  All tested parameters suggest a lack of any meaningful abuse potential for REL-1017 and are fully aligned with the 2019 DEA statement on methadone.1

About The Human Abuse Potential Study for REL-1017 vs. Oxycodone

The study was a single-dose, Phase 1, randomized, double-blind, double-dummy, active- and placebo-controlled, five-way crossover study to assess the abuse potential of REL-1017 relative to oxycodone and placebo in healthy experienced recreational drug users. Oxycodone, the active control, was administered at the dose of 40 mg, a standard dose in HAP studies. A total of 50 subjects were enrolled and 44 fulfilled the criteria for the predefined statistical analysis.   

Once available, the full data set and detailed results will be submitted to the FDA and for presentation at future scientific conferences and publication in peer-reviewed journals.

About REL-1017

REL-1017, a new chemical entity (NCE) and novel NMDA receptor (NMDAR) channel blocker that preferentially targets hyperactive channels while maintaining physiological glutamatergic neurotransmission, is currently in late-stage development for the treatment of MDD. The ongoing RELIANCE Clinical Research Program is designed to evaluate the potential for REL-1017 as the first rapid-acting, oral, once-daily antidepressant treatment. In a Phase 2 trial, REL-1017 demonstrated robust, rapid, and sustained antidepressant effects with statistically significant improvements compared to placebo. The Phase 2 study also confirmed the favorable pharmacokinetic, safety, and tolerability profile of REL-1017 observed in previously completed Phase 1 studies.

About Relmada Therapeutics, Inc. 

Relmada Therapeutics is a late-stage biotechnology company addressing diseases of the central nervous system (CNS), with a focus on major depressive disorder (MDD). Our experienced and dedicated team is committed to making a difference in the lives of patients and their families. Relmada's lead program, REL-1017, is a new chemical entity (NCE) and novel NMDA receptor (NMDAR) channel blocker that preferentially targets hyperactive channels while maintaining physiological glutamatergic neurotransmission. REL-1017 has entered late-stage development as an adjunctive treatment for MDD in adults. Learn more at www.relmada.com.

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