Zynerba Pharmaceuticals, Inc.

Lead Candidate, EPX-100, Holds Orphan Drug and Rare Pediatric Disease Designations EPX-100 in Pivotal Registrational Trial for Dravet Syndrome; Topline Data Expected in 2026 Plan to Initiate Phase 3 Trial for Lennox-Gastaut Syndrome in Second Half of 2024 Potential Billion Dollar Plus Market Opportunity in Rare Epilepsy PLYMOUTH MEETING, Pa., April 30, 2024 /PRNewswire/ -- Harmony Biosciences (Nasdaq: HRMY), today announced the acquisition of Epygenix Therapeutics, Inc., accelerating its growth strategy by adding a rare epilepsy franchise to its expanding late-stage pipeline of innovative CNS assets. "The acquisition of Epygenix gives us three distinct CNS franchises in late-stage development, each with a potential US peak sales opportunity of $1B - $2B," said Jeffrey M. Dayno, M.D., President and Chief Executive Officer at Harmony Biosciences. "We have been strategically building a robust and diverse pipeline of innovative CNS assets for rare diseases that has transformed our business. This acquisition builds on our leadership position in sleep/wake and our franchise in neurobehavioral disorders, allowing us to leverage our expertise in CNS and internal synergies to deliver new therapies to patients with unmet medical needs." "Harmony shares our team's core values, including a commitment to patients and families living with Dravet syndrome and Lennox-Gastaut syndrome, where a significant unmet need for effective therapies remains," said Alex Yang, Chair and CEO of Epygenix Therapeutics. "Harmony's demonstrated expertise in drug development and commercialization will accelerate the full potential of these treatments and make a real difference in the lives of Dravet and LGS families." The acquisition includes clemizole hydrochloride (EPX-100), a potent, oral, centrally acting serotonin (5HT2) agonist. It is currently in a pivotal registrational clinical trial for the treatment of Dravet syndrome in children and adults and is poised to enter Phase 3 for the treatment of Lennox-Gastaut syndrome. The proven mechanism of action of clemizole could potentially offer an improved product profile over currently available treatment options and improve daily functioning in patients living with Dravet syndrome and Lennox-Gastaut syndrome. EPX-100 has received Orphan Drug Designation (ODD) and Rare Pediatric Disease Designation (RPDD) from the FDA for both Dravet syndrome and Lennox-Gastaut syndrome. A second investigational product, EPX-200, is a potent, oral, centrally active and selective 5HT2C agonist, and is currently in IND-enabling studies. EPX-200 also received ODD from FDA for Dravet syndrome and Lennox-Gastaut syndrome as well as RPDD for Lennox-Gastaut syndrome. Under the terms of the definitive agreement, Harmony paid $35 million in cash with the potential for payments of up to $130 million based on development and regulatory milestones. In addition, there are potential payments of up to $515 million if certain sales milestones are achieved. About Clemizole hydrochloride (EPX-100) EPX-100, clemizole hydrochloride, is under development for the treatment of Dravet syndrome (DS) and Lennox-Gastaut syndrome (LGS). EPX-100 acts by targeting central 5-hydroxytryptamine receptors to modulate serotonin signaling. The drug candidate is administered orally twice a day in a liquid formulation and has been developed based on a proprietary phenotype-based zebrafish drug screening platform.1 DS is caused by a loss of function mutation in the SCN1A gene, and scn1 mutant zebrafish replicate the genetic etiology and phenotype observed in the majority of DS patients. The scn1Lab mutant zebrafish model that expresses voltage gated sodium channels has been used for high-throughput screening of compounds that modulate Nav1.1 in the central nervous system. About Dravet syndrome Dravet syndrome (DS) is a severe and progressive epileptic encephalopathy that begins in infancy and causes significant impact on patient functioning. DS begins in the first year of life and is characterized by high seizure frequency and severity, intellectual disability, and a risk of sudden unexpected death in epilepsy.1 Approximately 85% of Dravet syndrome cases are caused by de novo loss-of-function (LOF) mutations in a voltage-gated sodium channel gene, SCN1A1.2 DS has an estimated incidence rate of 1:15,7003. About Lennox-Gastaut syndrome Lennox-Gastaut syndrome (LGS) is a rare and drug-resistant epileptic encephalopathy characterized by onset in children between 3-5 years of age. The underlying cause of LGS is unknown and can be related to a wide range of factors including genetic differences and structural differences in the brain.2,4 As a result, patients experience multiple seizure types, including atonic seizures, and developmental, cognitive, and behavioral issues.3 LGS affects approximately 48,000 patients in the U.S5. About Harmony Biosciences At Harmony Biosciences, we specialize in developing and delivering treatments for rare neurological diseases that others often overlook. We believe that where empathy and innovation meet, a better life can begin for people living with neurological diseases. Established by Paragon Biosciences, LLC, in 2017 and headquartered in Plymouth Meeting, PA, our team of experts from a wide variety of disciplines and experiences is driven by our shared conviction that innovative science translates into therapeutic possibilities for our patients, who are at the heart of everything we do. For more information, please visit . About Epygenix Therapeutics, Inc. Epygenix Therapeutics, Inc. is a precision medicine-based biopharmaceutical company focused on genetically screening, discovering, and developing drugs to treat rare and intractable forms of genetic epilepsy in childhood, such as Dravet syndrome (DS). Epygenix is currently focused on developing EPX-100 and EPX-200, drug candidates that were discovered in a zebrafish model of DS which replicates the genetic mutation that causes DS and mimics the human pathology. This mechanism of action has been shown to eliminate both clinical and electrographic seizure activity which could translate into improved patient functioning. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including statements regarding our product WAKIX and our future capabilities following the acquisition of Epygenix, including clemizole hydrochloride. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the following: our commercialization efforts and strategy for WAKIX and our other product candidates, including clemizole hydrochloride; the rate and degree of market acceptance and clinical utility of WAKIX, pitolisant in additional indications, if approved, and any other product candidates, including clemizole hydrochloride, we may develop or acquire, if approved; our research and development plans, including our development activities with Bioprojet, and plans to explore the therapeutic potential of pitolisant in additional indications; our ongoing and planned clinical trials; the availability of favorable insurance coverage and reimbursement for WAKIX and our other product candidates, including clemizole hydrochloride; the timing of and our ability to obtain regulatory approvals for pitolisant for other indications as well as any of our product candidates, including those we are developing with Bioprojet and those that we have acquired; our failure to achieve the potential benefits of the 2022 LCA with Bioprojet; our ability to recognize the intended benefits of our acquisition of Zynerba Pharmaceuticals, Epygenix and another entity or assets that we acquire; our estimates regarding expenses, future revenue, capital requirements and needs for additional financing; our ability to identify additional products or product candidates with significant commercial potential that are consistent with our commercial objectives; our commercialization, marketing and manufacturing capabilities and strategy; significant competition in our industry; our intellectual property position; loss or retirement of key members of management; failure to successfully execute our growth strategy, including any delays in our planned future growth; our failure to maintain effective internal controls; the impact of government laws and regulations; volatility and fluctuations in the price of our common stock; the significant costs and required management time as a result of operating as a public company; the fact that the price of Harmony's common stock may be volatile and fluctuate substantially; statements related to our intended share repurchases and repurchase timeframe and the significant costs and required management time as a result of operating as a public company. These and other important factors discussed under the caption "Risk Factors" in our Annual Report on Form 10-K, as amended, filed with the Securities and Exchange Commission (the "SEC") on February 22, 2024, and our other filings with the SEC could cause actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management's estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. Harmony Biosciences Investor Contact: Luis Sanay, CFA 445-235-8386 [email protected] Harmony Biosciences Media Contact: Cate McCanless 202-641-6086 [email protected] 1 EpyGenix Company Presentation: 2 EpyGenix Poster: 3 Wu, E., et. al. (2015). Incidence of Dravet Syndrome in a US Population. Pediatrics 136(5): 1310-e1315. doi: 10.1542/peds.2015-1807. 4 5 SOURCE Harmony Biosciences

Harmony Biosciences has agreed to acquire Epygenix Therapeutics and its pipeline of serotonin agonist candidates for rare epileptic disorders, including the pivotal-stage asset EPX-100, in a deal that could be worth up to $680 million."This acquisition builds on our leadership in sleep/wake and neurobehavioural disorders," said Harmony CEO Jeffrey Dayno in a statement Tuesday. Harmony's sole product on the market is Wakix (pitolisant), which was approved in 2019 as a treatment for patients withNarcolepsy, and last year it bought out Zynerba Pharmaceuticals for up to $200 million, gaining a non-euphoric cannabinoid for rare neuropsychiatric disorders such as fragile X syndrome.Dravet readout in 2026The latest the deal "gives us three distinct CNS (central nervous system) franchises in late-stage development, each with a potential US peak sales opportunity of $1 billion - $2 billion," Dayno estimates. It includes a modest $35 million upfront, but could see an additional $130 million in future development and regulatory milestone payments as well as up to $515 million if certain sales targets are met.Epygenix's lead product is EPX-100 (clemizole), a serotonin 5HT2 receptor agonist currently in a registrational Phase II trial as a potential add-on treatment to help control convulsive seizures in paediatric and adult patients with Dravet syndrome. Top-line data are expected in 2026.LGS late-stage trial on deckHarmony also plans to start a Phase III trial of EPX-100 in Lennox-Gastaut syndrome (LGS) in the second half. "The proven mechanism of action of clemizole could potentially offer an improved product profile over currently available treatment options and improve daily functioning" in both Dravet and LGS patients, Harmony said.Epygenix's second investigational compound is EPX-200, an oral 5HT2C agonist that has received orphan drug designations for Dravet and LGS as well. According to the company's website, EPX-200 is an "FDA-approved weight management drug" modulates 5HT signaling pathways and reduced convulsive seizure frequency and/or severity in people with Dravet syndrome in a small-scale clinical trial.Both drugs, along with another early-stage compound EPX-300, are also in early testing for developmental epileptic encephalopathies. EPX-300 is an "FDA-approved antidepressant, anti-anxiety and sleep-inducing insomnia drug" that also targets 5HT signaling, the company wensite says.

WATERTOWN, Mass., Feb. 26, 2024 (GLOBE NEWSWIRE) -- Disc Medicine, Inc. (NASDAQ:IRON), a clinical-stage biopharmaceutical company focused on the discovery, development, and commercialization of novel treatments for patients suffering from serious hematologic diseases, today announced the appointment of Pamela Stephenson, MPH as the company’s Chief Commercial Officer. Ms. Stephenson is an experienced biotech executive with significant expertise in commercial and strategic leadership, particularly in therapies for rare diseases, and will be responsible for all aspects of Disc’s global commercialization strategy and execution. “We are delighted to welcome an accomplished leader such as Pamela to Disc, where her breadth of commercial experience and acumen will be instrumental as the company continues to grow,” said John Quisel, J.D., Ph.D., President and Chief Executive Officer of Disc. “Pamela’s track record of building and executing successful global commercial launches, particularly for rare disease markets, comes at an opportune time for Disc as we enter late-stage development and begin commercial planning and engaging key stakeholders.” “I am excited to be joining Disc at this pivotal time in the company’s trajectory towards building a leading hematology company. Disc’s assets have the potential to make a significant impact on the lives of patients, with compelling value propositions and meaningful market opportunities,” said Ms. Stephenson. “With significant milestones this year for all three pipeline programs, I look forward to leading the commercialization efforts to support Disc’s mission of delivering novel treatments to patients with high unmet need.” Ms. Stephenson has more than 25 years of biopharma commercial leadership experience across multiple functions and disease areas. Most recently, she served as the Chief Commercial Officer of Albireo, which was acquired by Ipsen, spearheading the successful launch of Bylvay for a rare cholestatic liver disease. Before joining Albireo, Ms. Stephenson served as Vice President, Global Market Access and Value, at Vertex Pharmaceuticals, where she led the global market access and pricing strategy for current and future products. Earlier in her tenure at Vertex, she led marketing and sales activities for the company’s hepatitis C and cystic fibrosis lines of business, and oversaw the U.S. launches of Incivek® (telaprevir) and Orkambi® (lumacaftor/ivacaftor). Prior to Vertex, Ms. Stephenson spent 10 years at Pfizer in marketing roles of increasing responsibility for brands such as Viagra® (sildenafil citrate), Lyrica® (pregabalin), and Aromasin® (exemestane). Ms. Stephenson served as board member of Zynerba Pharmaceuticals, a public biotech company focused on developing therapeutics for patients with rare neuropsychiatric conditions, which was acquired by Harmony Biosciences in October 2023. Ms. Stephenson holds a bachelor’s degree from Brown University and received her master’s degree in public health from Boston University School of Public Health. In connection with Ms. Stephenson’s appointment, Disc granted to Ms. Stephenson an inducement equity award outside of Disc’s Amended and Restated 2021 Stock Option and Incentive Plan in accordance with NASDAQ Listing Rule 5635(c)(4), comprised of (i) an option to purchase 55,000 shares (the “Option Award”) of Disc’s common stock (“Common Stock”), at an exercise price equal to the closing price of the Common Stock on the date of grant, and (ii) a restricted stock unit award for 36,666 shares of Common Stock (the “RSU Award” and, together with the Option Award, the “Inducement Award”). The Option Award shall vest 25% on the first anniversary of Ms. Stephenson’s start date, with the remainder vesting in 36 equal monthly installments thereafter. The RSU Award shall vest in equal installments on each of the first, second, third, and fourth anniversaries of the vesting date set by Disc’s company vesting policy. The Inducement Award was approved by Disc’s Board of Directors (the “Board”), including a majority of the independent directors serving on the Board. About Disc Medicine Disc Medicine (NASDAQ:IRON) is a clinical-stage biopharmaceutical company committed to discovering, developing, and commercializing novel treatments for patients who suffer from serious hematologic diseases. We are building a portfolio of innovative, potentially first-in-class therapeutic candidates that aim to address a wide spectrum of hematologic diseases by targeting fundamental biological pathways of red blood cell biology, specifically heme biosynthesis and iron homeostasis. For more information, please visit Disc Cautionary Statement Regarding Forward-Looking Statements This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including, but not limited to, express or implied statements regarding Disc’s expectations with respect to the chief commercial officer position, data read-outs, and Disc’s development and commercialization. The use of words such as, but not limited to, “believe,” “expect,” “estimate,” “project,” “intend,” “future,” “potential,” “look forward,” “continue,” “may,” “might,” “plan,” “will,” “should,” “seek,” “anticipate,” or “could” or the negative of these terms and other similar words or expressions that are intended to identify forward-looking statements. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based on Disc’s current beliefs, expectations and assumptions regarding the future of Disc’s business, future plans and strategies, clinical results and other future conditions. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. Disc may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and investors should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements as a result of a number of material risks and uncertainties including but not limited to: Disc’s expectations regarding the chief commercial officer position; Disc’s expectations regarding leadership, future growth and innovation; Disc’s expectations regarding the milestones for its research and development programs in 2024; Disc’s expectations of entering late-stage development and planning for commercialization; and the other risks and uncertainties described in the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2022, Quarterly Reports on Form 10-Q for the quarters ended March 31, 2023, June 30, 2023, and September 30, 2023 and other documents filed by Disc from time to time with the Securities and Exchange Commission (SEC), as well as discussions of potential risks, uncertainties, and other important factors in Disc’s subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. None of Disc, nor its affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as result of new information, future events or otherwise, except as required by law. Media Contact Peg Rusconi Verge Scientific Communications prusconi@vergescientific.com Investor Relations Contact Christina Tartaglia Stern Investor Relations christina.tartaglia@sternir.com