PharmaTher Files for FDA Orphan Drug Designation for Ketamine to Treat Lou Gehrig’s Disease

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TORONTO, May 25, 2021 (GLOBE NEWSWIRE) — PharmaTher Holdings Ltd. (the “Company” or “PharmaTher”) (OTCQB: PHRRF) (CSE: PHRM), a clinical-stage psychedelics biotech company, is pleased to announce that it has filed an application with the U.S. Food and Drug Administration (“FDA”) to receive Orphan Drug Designation (“ODD”) for ketamine to treat amyotrophic lateral sclerosis (“ALS”), also known as Lou Gehrig’s disease.

ALS is a progressive neuromuscular disease with a life expectancy of only two to six years after diagnosis. Currently, there is no known cure for ALS. ALS affects approximately 50,000 people in the U.S. and Europe, with over 5,000 new cases diagnosed annually. As ALS advances, upper and lower motor neurons die, causing the brain to lose its ability to control muscle movement. ALS patients experience progressive loss of voluntary muscle action as an effect of the disease, resulting in the inability to speak, eat, move and, eventually, breathe. The FDA approved only three pharmaceuticals for the treatment of ALS: riluzole, edaravone, and Nuedexta (dextromethorphan HBr and quinidine sulfate). These drugs are effective against disease mechanisms of ALS but fail to have measurable effects on attenuating disease progression or improve survival. Therefore, there is an imperative need for new pharmacological therapies that can stop or slow the muscle decline associated with ALS progression and extend the life expectancy of the ALS patient.  Peak sales for a new drug to treat ALS has the potential to achieve over USD $1 billion.

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The rationale for ketamine as a potential treatment for ALS

Ketamine has the potential to effectively increase the life expectancy of those with ALS at any stage and slow the progressive loss of muscle associated with poor outcomes of the disease.   The University of Kansas Medical Center researchers and inventors of the potential use of ketamine to treat ALS, Dr. Richard J. Barohn, M.D., John A. Stanford, Ph.D., and Dr. Matthew Macaluso, D.O., have made the promising discovery that ketamine can be administered as an effective treatment for ALS. Unpublished and patent-pending preclinical research has shown that the administration of ketamine preserves muscle function in advancing ALS and increases life expectancy when given in the early stages of muscle decline.

Ketamine works by blocking the action of the ionotropic glutamate receptor, the NMDA receptor. Unlike other inhibitors of NMDA receptor function, such as riluzole, ketamine dampens NMDA receptor-related glutamate excitotoxicity indirectly. Further, ketamine can lower D-serine concentrations intracellularly and also partially activates dopamine receptors. Collectively, these mechanisms of ketamine contribute in part to the drug’s neuroprotective effects, which may extend to the motor neurons targeted in ALS.

PharmaTher previously announced that it has entered into an exclusive license agreement with The University of Kansas for the development and commercialization of the intellectual property of ketamine in the treatment of ALS.

Fabio Chianelli, Chief Executive Officer of PharmaTher, said, “Ketamine has tremendous potential for not only mental illness and pain disorders but also for neurodegenerative diseases such as ALS.  Our FDA orphan drug application for ketamine to treat this life-threatening disease complements our patent portfolio that aims to protect the proposed method of use and dosage claims of ketamine for ALS.  Although patent protection or market exclusivity could last beyond 2040, our intention to seek orphan drug designation is to leverage the expedited regulatory and clinical development incentives offered by the FDA for repurposed drugs in treating rare diseases.  We are working with our clinical and regulatory advisors in preparing our clinical development plan and study protocol while leveraging our recent investigational new drug application approved by the FDA for Parkinson’s disease to proceed with a potential phase 2 clinical study in ALS patients this year.”

The Orphan Drug Act grants special status to a drug or biological product to treat a rare disease or condition upon request of a sponsor. This status is referred to as orphan designation (or sometimes “orphan status”). The FDA grants orphan status to products that treat rare diseases, providing incentives to sponsors developing drugs or biologics. The FDA defines rare diseases as those affecting fewer than 200,000 people in the United States at any given time. The incidence of ALS is well within the limit of 200,000 for orphan indication status. Orphan drug designation would qualify ketamine for certain benefits and incentives, including seven years of marketing exclusivity if regulatory approval is ultimately received for the designated indication, potential tax credits for certain clinical drug testing costs, activities, eligibility for orphan drug grants, and the waiver of the FDA New Drug Application filing fee of approximately $2.4 million.

About PharmaTher Holdings Ltd.

PharmaTher Holdings Ltd. (OTCQB: PHRRF) (CSE: PHRM) is a clinical-stage psychedelics biotech company focused on the research, development and commercialization of novel uses, formulations and delivery methods of psychedelics to treat mental illness, neurological and pain disorders.   PharmaTher is currently conducting an FDA approved phase 2 clinical study with ketamine to treat Parkinson’s disease and is developing a novel microneedle patch for the intradermal delivery of psychedelics.

Learn more at: PharmaTher.com and follow us on Twitter and LinkedIn.


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