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Three blockbuster-potential assets in late-stage clinical trials and four pivotal readouts expected in 2025; anticipate four commercial assets by 2028 Study 1 of Essential3 program for ulixacaltamide in essential tremor (ET) on track for Q1 2025 interim analysis; NDA filing for ulixacaltamide expected in 2025 Enrollment in EMBOLD study of relutrigine cohort 2 is on track; targeting NDA filing in 2026 Vormatrigine ENERGY program advancing with read-outs of RADIANT in first half of 2025 and POWER1 by year-end 2025 UCB has exercised its option to license KCNT1 small molecule candidate for global development and commercialization Cash and investments ~ $470 million at the end of 2024 support runway into 2028 BOSTON, Jan. 12, 2025 (GLOBE NEWSWIRE) -- Praxis Precision Medicines, Inc. (NASDAQ: PRAX), a clinical-stage biopharmaceutical company translating genetic insights into the development of therapies for central nervous system (CNS) disorders characterized by neuronal excitation-inhibition imbalance, today highlighted its portfolio progress and provided its business priorities for 2025. “2024 was a landmark year for Praxis with positive topline results from the Phase 2 photoparoxysmal response (PPR) trial of vormatrigine that led to initiating our ENERGY program in common epilepsies. Additional highlights this year were the unprecedented efficacy in cohort 1 of the EMBOLD study of relutrigine in developmental and epileptic encephalopathies (DEEs), followed by the initiation of the registrational cohort 2, and the continued overwhelming interest in the Essential3 program. Together, this progress has led to three blockbuster programs in late stage, with the potential for four product launches between 2026 and 2028,” said Marcio Souza, president and chief executive officer. Mr. Souza continued, “We are now well positioned for a readout-rich 2025, with results anticipated for ulixacaltamide in the Essential3 program in ET followed by our first NDA filing, as well as topline results for vormatrigine from the RADIANT study in focal onset seizures (FOS) and generalized epilepsy, and the POWER1 study in FOS. We are also thrilled to have received a third rare pediatric drug designation (RPDD) for relutrigine in Dravet Syndrome, and with strong interest in cohort 2 of the EMBOLD study, we expect to file the NDA in 2026. With regulatory feedback on the elsunersen program, we expect to initiate the pivotal trial in the first half of 2025. We are sufficiently funded to advance all programs through their topline readouts, with runway into 2028. We look forward to providing a thorough update across our portfolio at the planned Investor R&D Day in the second quarter of 2025.” Portfolio updates and anticipated milestones Cerebrum™ Small Molecule PlatformUlixacaltamide for Essential TremorET is an inadequately managed, undertreated and high burden disease with a prevalence of seven million patients in the U.S. The Essential3 program includes two Phase 3, registrational studies: Study 1 is a parallel design, placebo-controlled study (N=400) and Study 2 is a randomized withdrawal study (N=200). Since beginning recruitment in November 2023, over 100,000 patients have demonstrated interest in participating in the study. A pre-planned interim analysis of Study 1 is anticipated in the first quarter of 2025.At the time of the interim analysis update, Praxis will provide further detail on timing for the full readouts of Study 1 and Study 2.Praxis anticipates filing the NDA for ulixacaltamide in 2025.Following positive results from Essential3, the Company plans to re-initiate a study of ulixacaltamide in Parkinson’s disease, where there is significant and unmet need for non-dopaminergic treatment options. Vormatrigine (PRAX-628) for Common Epilepsies (Focal Onset Seizures and Generalized Epilepsy)An estimated 3.5 million people in the U.S. suffer from common epilepsies. Sodium channel therapy is the cornerstone of treatment for patients with epilepsy yet currently approved drugs have significant safety and efficacy limitations. Vormatrigine is the most potent sodium-channel modulator ever designed to precisely target the hyperexcitable state of sodium-channels in adult common epilepsies. In recently completed Phase 1 studies, vormatrigine continued to demonstrate an ideal profile with strong competitive differentiation. Full results will be shared at an upcoming medical conference and highlights include: Results from an additional 45 mg multiple ascending dose (MAD) cohort showed a dose proportional increase in exposure with excellent tolerability, similar to the 20 and 30 mg MAD cohorts completed previously.A Phase 1 food effect study demonstrated that food intake does not affect vormatrigine absorption and therefore there is no need to take vormatrigine with food, which increases flexibility in dosing and ease of use. Praxis continues to make progress on the ENERGY program to advance vormatrigine through efficacy and registrational trials. The EMPOWER observational study, in partnership with the Epilepsy Study Consortium, is aiming to better characterize seizure burden started enrolling patients in 2024 and has enrolled over 2,000 patients. Early results were shared during the Praxis scientific exhibit at the December 2024 American Epilepsy Society (AES) Annual Meeting. The RADIANT Phase 2 study for FOS and generalized epilepsy is currently enrolling patients, with topline results expected in the first half of 2025. RADIANT is an open-label study recruiting up to 50 patients with FOS or generalized epilepsy, who will be treated with a 30 mg dose over an 8-week period to evaluate the impact of vormatrigine on seizure burden.Enrollment for the POWER1 Phase 2/3 registrational study in patients with treatment resistant FOS is progressing as planned, with topline results anticipated in the second half of 2025. POWER1 is assessing adjunctive treatment, allowing dosing of vormatrigine on top of 1 to 3 antiseizure medications (ASMs), and aims to enroll approximately 250 patients in a parallel-arm study, comparing a treatment arm of 20 mg for 6 weeks followed by 30 mg for 6 weeks versus a placebo arm for 12 weeks.POWER2 will be the second registrational study for vormatrigine and is expected to begin enrollment in the second half of 2025 as a three-arm, 12-week study. Praxis continues to evaluate the potential for expansion of one of its highly functionally selective compounds into pain indications. The program will be discussed at Praxis’ planned R&D Day in the second quarter of 2025. Relutrigine (PRAX-562) for Developmental and Epileptic Encephalopathies DEEs cover a wide range of genetically and phenotypically defined epileptic conditions that are often characterized by onset of seizures at or shortly after birth and occur in approximately 200,000 patients in the U.S. Relutrigine is a sodium channel modulator with therapeutic potential across developmental epilepsies. Relutrigine is currently being evaluated in the EMBOLD study in SCN2A and SCN8A DEEs, with future plans for the EMERALD study in a broader, pan-DEE patient population. In cohort 1 of the EMBOLD study assessing relutrigine versus placebo in SCN2A gain-of-function (GoF) and SCN8A patients, relutrigine showed unparalleled results, with an update on the open-label extension (OLE) shared at the 2024 AES Annual Meeting . Key results included: 46% placebo-adjusted reduction in monthly motor seizures from baseline over a 16-week period.Patients continuing into the ongoing OLE (n=13) saw a 77% reduction in motor seizures from baseline through nine months of treatment.Over 30% of patients (n=5) achieved seizure freedom status while on relutrigine.Patients achieving seizure freedom had a median of 46 days of seizure freedom, inclusive of OLE period, compared to 3 days at baseline.Meaningful gains observed in alertness, communication and seizure severity suggest relutrigine has a disease modifying effect.Relutrigine was generally well-tolerated with no drug-related serious adverse events or dose reductions required. EMBOLD is currently enrolling 80 patients with SCN2A and SCN8A DEEs in registrational cohort 2, with topline results anticipated in the first half of 2026, to be followed by an NDA filing later in 2026.In December 2024, Praxis received RPDD for relutrigine for Dravet Syndrome. This is the third RPDD for relutrigine, in addition to SCN2A and SCN8A DEEs.Praxis remains on track to initiate the EMERALD registrational study in the first half of 2025.At the 2024 AES Annual Meeting, Praxis shared an update for an emergency use patient with extended benefit achieved after receiving relutrigine Solidus™ Antisense Oligonucleotide (ASO) PlatformElsunersen (PRAX-222) for early-seizure-onset SCN2A-DEE SCN2A GoF-DEE is a rare, genetic epilepsy characterized by early-onset and severe impact on development. The disease, as with all DEEs, affects not only the patient but also the entire caregiver ecosystem. In a Part 1 analysis of the EMBRAVE study, four patients receiving elsunersen over a four-month period achieved a 43% reduction in seizure burden compared to baseline. Praxis has completed discussions with global regulatory agencies to harmonize a registrational study design for elsunersen and will share the trial design and expected timelines in the first quarter of 2025.The second cohort of the EMBRAVE study continues to enroll patients in Brazil, evaluating safety and efficacy of elsunersen versus sham procedure.At the 2024 AES Annual Meeting, Praxis shared an update on four emergency access patients, including updates from the first-in-patient case who has received elsunersen for over 15 months. Additional Pipeline Updates In December 2024, UCB exercised its option to in-license global development and commercialization rights for a KCNT1 small molecule development candidate as part of the strategic research collaboration established in December 2022. Praxis has earned an option exercise fee and is eligible to receive future success-based development and commercialization milestone payments, for a total of up to approximately $100 million, in addition to tiered royalties on net sales of any resulting products from the collaboration.Praxis remains on track to nominate a development candidate for each of its early stage ASO therapeutic initiatives in 2025 PRAX-080: Focused on targeting PCDH19 mosaic expression which represents a pioneering approach to treating PCDH19-related epilepsy, a rare but devastating genetic disorder characterized by early-onset seizures and cognitive impairment, disproportionately affecting females.PRAX-090: Designed to address SYNGAP1 loss-of-function (LoF) mutations, a leading cause of severe intellectual disability and epilepsy in DEEs.PRAX-100: Targeting SCN2A LoF mutations, the predominant genetic link to de novo autism spectrum disorders (ASD). About UlixacaltamideUlixacaltamide is a differentiated and highly selective small molecule inhibitor of T-type calcium channels designed to block abnormal neuronal burst firing in the Cerebello-Thalamo-Cortical (CTC) circuit correlated with tremor activity. Ulixacaltamide, the most advanced program within Praxis’ Cerebrum™ small molecule platform, is currently in late-stage development for the treatment of essential tremor, Essential3 study. About Vormatrigine (PRAX-628)Vormatrigine is a next-generation, functionally selective small molecule targeting the hyperexcitable state of sodium-channels in the brain that is currently being developed as a once daily, oral treatment for adult focal onset seizures and generalized epilepsy. Preclinical data demonstrates vormatrigine is differentiated from standard of care, with the potential to be best-in-class for focal epilepsy. In vitro, vormatrigine has demonstrated superior selectivity for disease-state NaV channel hyperexcitability. In vivo studies of vormatrigine have demonstrated unprecedented potency in the maximal electroshock seizure (MES) model, a highly predictive translational model for efficacy in focal epilepsy. Data from the study demonstrated that vormatrigine can be safely dosed in healthy subjects to greater than 15 times the predicted human equivalent of the rodent MES EC50. To learn more about the POWER1 study please visit POWER1 study. About Relutrigine (PRAX-562)Relutrigine is a first-in-class small molecule in development for the treatment of developmental and epileptic encephalopathy (DEE) as a preferential inhibitor of persistent sodium current, shown to be a key driver of seizure symptoms in early onset SCN2A-DEE and SCN8A-DEE. Relutrigine’s mechanism of sodium channel blocking is consistent with superior selectivity for disease state sodium channel (NaV) channel hyperexcitability. In vivo studies of relutrigine have demonstrated dose-dependent inhibition of seizures up to complete control of seizure activity in SCN2A, SCN8A and other DEE mouse models. Relutrigine has been generally well-tolerated in three Phase 1 studies and has demonstrated biomarker changes indicative of NaV channel blocking effects. Relutrigine has received ODD and RPDD from the FDA, and ODD from the European Medicines Agency for the treatment of SCN2A-DEE and SCN8A-DEE and RPDD for Dravet Syndrome from the FDA. To learn more about the EMBOLD study, please visit EMBOLD study. About Elsunersen (PRAX-222)Elsunersen is an antisense oligonucleotide (ASO) designed to selectively decrease SCN2A gene expression, directly targeting the underlying cause of early-seizure-onset SCN2A-DEE to treat seizures and other symptoms in patients with gain-of-function SCN2A mutations. In vitro studies of elsunersen have demonstrated reduction in both SCN2A gene expression and protein levels. In vivo, elsunersen has demonstrated significant, dose-dependent reduction in seizures, improvement in behavioral and locomotor activity and increased survival in SCN2A mouse models, with potential to be the first disease-modifying treatment for SCN2A-DEE. Elsunersen has received ODD and RPD from the FDA, and ODD and PRIME designations from the European Medicines Agency for the treatment of SCN2A-DEE. The Elsunersen program is ongoing under a collaboration with Ionis Pharmaceuticals, Inc. (NASDAQ: IONS), and RogCon, Inc. To learn more about the EMBRAVE study, please visit https://www.embravestudy.com/. About Praxis  Praxis Precision Medicines is a clinical-stage biopharmaceutical company translating insights from genetic epilepsies into the development of therapies for CNS disorders characterized by neuronal excitation-inhibition imbalance. Praxis is applying genetic insights to the discovery and development of therapies for rare and more prevalent neurological disorders through our proprietary small molecule platform, Cerebrum™, and antisense oligonucleotide (ASO) platform, Solidus™, using our understanding of shared biological targets and circuits in the brain. Praxis has established a diversified, multimodal CNS portfolio including multiple programs across movement disorders and epilepsy, with four clinical-stage product candidates. For more information, please visit www.praxismedicines.com and follow us on Facebook, LinkedIn and Twitter/X. Forward-Looking Statements This press release contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995 and other federal securities laws, including express or implied statements regarding Praxis’ future expectations, plans and prospects, including, without limitation, statements regarding the anticipated timing of our clinical trials, the development of our product candidates and plans to initiate new clinical programs, the anticipated timing of regulatory submissions and interactions and our projected cash runway, as well as other statements containing the words “anticipate,” “believe,” “continue,” “could,” “endeavor,” “estimate,” “expect,” “anticipate,” “intend,” “may,” “might,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will” or “would” and similar expressions that constitute forward-looking statements under the Private Securities Litigation Reform Act of 1995. The express or implied forward-looking statements included in this press release are only predictions and are subject to a number of risks, uncertainties and assumptions, including, without limitation: uncertainties inherent in clinical trials; preliminary analyses from ongoing studies differing materially from final data from preclinical studies and completed clinical trials; the expected timing of clinical trials, data readouts and the results thereof, and submissions for regulatory approval or review by governmental authorities; regulatory approvals to conduct trials; and other risks concerning Praxis’ programs and operations as described in its Annual Report on Form 10-K for the year ended December 31, 2023 and other filings made with the Securities and Exchange Commission. Although Praxis’ forward-looking statements reflect the good faith judgment of its management, these statements are based only on information and factors currently known by Praxis. As a result, you are cautioned not to rely on these forward-looking statements. Any forward-looking statement made in this press release speaks only as of the date on which it is made. Praxis undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future developments or otherwise.

PARAMUS, N.J., Dec. 8, 2024 /PRNewswire/ -- SK Life Science, Inc., a global leader in treatments for central nervous system (CNS) disorders and a subsidiary of SK Biopharmaceuticals Co., Ltd., presented data at the American Epilepsy Society (AES) Annual Meeting, showcasing its antiseizure medication XCOPRI® (cenobamate tablets) CV. Key data offered a better understanding of cenobamate's unique dual mechanism of action (MOA) that enhances GABAergic inhibition at the type A γ-aminobutyric acid (GABAA) ion channel and reduces neuronal excitability by preferentially inhibiting the persistent sodium current. Continue Reading "We are a company dedicated to advancing treatment options for epilepsy, supporting the epilepsy community and providing meaningful solutions for patients and their families," said Louis Ferrari, BS, RPh, MBA, vice president, Medical Affairs at SK Life Science. "It is critically important for patients with epilepsy to achieve seizure control as early as possible. The data we presented at AES offer new insights into our drug's unique dual MOA and highlight the potential for flexible and individualized dosing with cenobamate which, along with adjustment of concomitant ASMs to improve tolerability, may help more patients achieve optimal seizure reduction. Additionally, our data provided objective evidence of our treatment's effect on patterns of electrical activity in the brain and seizure reduction." We are dedicated to advancing treatment options and providing meaningful solutions for the epilepsy community. Post this Clarification of the MOA of cenobamate Deeper understanding of cenobamate's bi-modal mechanism of action further elucidates its dual role on voltage-gated sodium channels and GABAA receptors. Specifically, in preclinical studies, researchers observed cenobamate's selectivity for blockade of persistent sodium currents (INaP), while sparing the transient sodium current (INaT). The effect of cenobamate's selective INaP block on the resting membrane potential is augmented by its positive allosteric modulation of GABAA receptor-mediated tonic currents. Cenobamate's selectivity for the INaP over the INaT likely represents action on the NaV1.6 channel over the NaV1.1 channel, a feature not seen with traditional ASMs, like phenytoin or carbamazepine. Potential for flexible and individualized dosing New data examining the initial doses of cenobamate that were associated with seizure freedom in the phase 3 open-label efficacy subset showed the initial seizure freedom interval occurred at a wide range of cenobamate doses, with some patients requiring higher doses. These data highlight the potential for flexible and individualized dosing with cenobamate which, along with adjustment of concomitant antiseizure medication to improve tolerability, may help more patients achieve optimal seizure reduction. The effect of cenobamate on responsive neurostimulation epileptiform events A retrospective, multicenter, observational, 24-week study among 37 patients with uncontrolled seizures, showed a significant reduction in epileptiform events along with a significant reduction in clinically reported seizures during adjunctive cenobamate treatment. Results from this analysis demonstrate, through electrocorticographic data and observation of clinical seizures, the effectiveness of cenobamate in the treatment of focal seizures. The complete list of SK Life Science abstracts presented at AES can be found here. About SK Life Science, Inc. and SK Biopharmaceuticals Co., Ltd. SK Life Science, Inc., with headquarters in Paramus, New Jersey, is a U.S. subsidiary of SK Biopharmaceuticals Co., Ltd., a pioneering South Korean company in drug development and commercialization. Together, they are advancing innovative treatments for central nervous system (CNS) disorders and oncology, with eight compounds currently in development. SK Life Science and SK Biopharmaceuticals are committed to addressing critical unmet medical needs for patients with conditions such as epilepsy, sleep disorders, neuropathic pain, Alzheimer's disease, and schizophrenia. For more information, visit . SK Biopharmaceuticals Co., Ltd. is part of SK Group, South Korea's second-largest conglomerate. SK Group is a collection of global industry-leading companies driving innovations in energy, advanced materials, biopharmaceuticals and digital business. For more information about SK Biopharmaceuticals, visit . About XCOPRI® (cenobamate tablets) CV Cenobamate is an antiseizure medication (ASM) discovered and developed by SK Biopharmaceuticals and SK Life Science. Cenobamate reduces neuronal excitability through a unique dual mechanism of action, preferentially inhibiting the persistent sodium current and enhancing GABAergic inhibition at the type A γ-aminobutyric acid (GABAA) ion channel. The precise mechanism by which Cenobamate exerts its therapeutic effect is unknown. Cenobamate is marketed under the brand name XCOPRI® in the U.S. by SK Life Science, Inc. Additionally, XCOPRI is commercialized in Canada and Israel by SK Biopharmaceuticals' partners, Paladin Labs Inc. and Dexcel Ltd. Cenobamate is marketed as ONTOZRY® by Angelini Pharma S.p.A. in Europe, the UK, and Switzerland. Cenobamate is also being developed for commercialization by SK Biopharmaceuticals' partners in many other countries to meet the needs of patients living with epilepsy, including Dong-A ST Co., Ltd., Eurofarma Laboratórios S.A., Hikma MENA FZE, Ignis Therapeutics, Inc. and ONO Pharmaceutical Co., Ltd. XCOPRI® and ONTOZRY® are registered trademarks of SK Biopharmaceuticals Co., Ltd. IMPORTANT SAFETY INFORMATION AND INDICATION FOR XCOPRI® (cenobamate tablets) CV DO NOT TAKE XCOPRI IF YOU: Are allergic to cenobamate or any of the other ingredients in XCOPRI. Have a genetic problem (called Familial Short QT syndrome) that affects the electrical system of the heart. XCOPRI CAN CAUSE SERIOUS SIDE EFFECTS, INCLUDING: Allergic reactions: XCOPRI can cause serious skin rash or other serious allergic reactions which may affect organs and other parts of your body like the liver or blood cells. You may or may not have a rash with these types of reactions. Call your healthcare provider right away and go to the nearest emergency room if you have any of the following: swelling of your face, eyes, lips, or tongue, trouble swallowing or breathing, a skin rash, hives, fever, swollen glands, or sore throat that does not go away or comes and goes, painful sores in the mouth or around your eyes, yellowing of your skin or eyes, unusual bruising or bleeding, severe fatigue or weakness, severe muscle pain, frequent infections, or infections that do not go away. Take XCOPRI exactly as your healthcare provider tells you to take it. It is very important to increase your dose of XCOPRI slowly, as instructed by your healthcare provider. QT shortening: XCOPRI may cause problems with the electrical system of the heart (QT shortening). Call your healthcare provider if you have symptoms of QT shortening including fast heartbeat (heart palpitations) that last a long time or fainting. Suicidal behavior and ideation: Antiepileptic drugs, including XCOPRI, may cause suicidal thoughts or actions in a very small number of people, about 1 in 500. Call your health care provider right away if you have any of the following symptoms, especially if they are new, worse, or worry you: thoughts about suicide or dying; attempting to commit suicide; new or worse depression, anxiety, or irritability; feeling agitated or restless; panic attacks; trouble sleeping (insomnia); acting aggressive; being angry or violent; acting on dangerous impulses; an extreme increase in activity and talking (mania); or other unusual changes in behavior or mood. Nervous system problems: XCOPRI may cause problems that affect your nervous system. Symptoms of nervous system problems include: dizziness, trouble walking or with coordination, feeling sleepy and tired, trouble concentrating, remembering, and thinking clearly, and vision problems. Do not drive, operate heavy machinery, or do other dangerous activities until you know how XCOPRI affects you. Do not drink alcohol or take other medicines that can make you sleepy or dizzy while taking XCOPRI without first talking to your healthcare provider. DISCONTINUATION: Do not stop taking XCOPRI without first talking to your healthcare provider. Stopping XCOPRI suddenly can cause serious problems. Stopping seizure medicine suddenly in a patient who has epilepsy can cause seizures that will not stop (status epilepticus). DRUG INTERACTIONS: XCOPRI may affect the way other medicines work, and other medicines may affect how XCOPRI works. Do not start or stop other medicines without talking to your healthcare provider. Tell healthcare providers about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal supplements. PREGNANCY AND LACTATION: XCOPRI may cause your birth control medicine to be less effective. Talk to your health care provider about the best birth control method to use. Talk to your health care provider if you are pregnant or plan to become pregnant. It is not known if XCOPRI will harm your unborn baby. Tell your healthcare provider right away if you become pregnant while taking XCOPRI. You and your healthcare provider will decide if you should take XCOPRI while you are pregnant. If you become pregnant while taking XCOPRI, talk to your healthcare provider about registering with the North American Antiepileptic Drug (NAAED) Pregnancy Registry. The purpose of this registry is to collect information about the safety of antiepileptic medicine during pregnancy. You can enroll in this registry by calling 1-888-233-2334 or go to . Talk to your health care provider if you are breastfeeding or plan to breastfeed. It is not known if XCOPRI passes into breastmilk. Talk to your healthcare provider about the best way to feed your baby while taking XCOPRI. COMMON SIDE EFFECTS: The most common side effects in patients taking XCOPRI include dizziness, sleepiness, headache, double vision, and feeling tired. These are not all the possible side effects of XCOPRI. Tell your healthcare provider if you have any side effect that bothers you or that does not go away. For more information, ask your healthcare provider or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at . DRUG ABUSE: XCOPRI is a federally controlled substance (CV) because it can be abused or lead to dependence. Keep XCOPRI in a safe place to prevent misuse and abuse. Selling or giving away XCOPRI may harm others and is against the law. INDICATION: XCOPRI is a prescription medicine used to treat partial-onset seizures in adults 18 years of age and older. It is not known if XCOPRI is safe and effective in children under 18 years of age. Please see additional patient information in the Medication Guide. This information does not take the place of talking with your healthcare provider about your condition or your treatment. Please see full Prescribing Information. About Epilepsy Epilepsy is the fourth most common neurological disorder. There are approximately 3.4 million people living with epilepsy in the United States, with 150,000 new cases each year in the country.1,2 Epilepsy is characterized by recurrent, unprovoked seizures. The seizures in epilepsy may be related to a brain injury or a family tendency, but often the cause is completely unknown. Having seizures and epilepsy can affect one's safety, relationships, work, driving, and much more.3,4 People with epilepsy are at risk for accidents and other health complications, including falling, drowning, depression and sudden unexplained death in epilepsy (SUDEP).3,4 Despite the availability of many antiepileptic therapies, almost 40 percent of people with epilepsy are not able to achieve seizure freedom, meaning they have epilepsy that remains uncontrolled.5 References Epilepsy Foundation. Who Can Get Epilepsy? . Accessed December 2024. Epilepsy Foundation. Facts & Statistics About Epilepsy. . Accessed December 2024. Epilepsy Foundation. Staying Safe. . Accessed December 2024. Epilepsy Foundation. Complications and Risks. . Accessed December 2024. Chen Z, Brodie MJ, Liew D, Kwan P. Treatment outcomes in patients with newly diagnosed epilepsy treated with established and new antiepileptic drugs: a 30-year longitudinal cohort study. . Published online December 26, 2017. 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BOSTON, Nov. 26, 2024 (GLOBE NEWSWIRE) -- Praxis Precision Medicines, Inc. (NASDAQ: PRAX), a clinical-stage biopharmaceutical company translating genetic insights into the development of therapies for central nervous system (CNS) disorders characterized by neuronal excitation-inhibition imbalance, today announced that that it will present preclinical and clinical data from three of its epilepsy programs at the American Epilepsy Society (AES) Annual Meeting, being held from December 6 to 10, 2024 in Los Angeles, California. “At Praxis, we are on the brink of transformative change with a leading pipeline that includes relutrigine and vormatrigine, the most potent and most functionally selective anti-seizure medications developed to date,” said Steven Petrou, chief scientific officer and co-founder of Praxis. “Following promising results with the relutrigine EMBOLD study in particularly challenging childhood epilepsies, we are confident that these future therapies will redefine treatment for DEEs as well as focal and generalized epilepsy. This year at AES we will be sharing the latest advances across our epilepsy portfolio through an exciting lineup of activities.” Praxis will have multiple options for visitors to learn more about its portfolio: Exhibiting at booth #1235, where visitors can interact with members of the Praxis teamPresenting five unique posters covering three of its clinical-stage assets, detailed belowHosting a scientific exhibit featuring its leading portfolio of precision epilepsy programs, detailed below Poster Presentations Saturday December 7, 12:00 p.m. – 2:00 p.m. PSTLocation: South Hall H, Level 1 1.398. Vormatrigine Demonstrates Potent Antiseizure Activity Across Three Acute Models with Highest Predictive Validity for Focal Onset Seizures 1.525. Emergency Use Case of Relutrigine, a Next-Generation Sodium Channel Functional State Modulator, in an Infant with SCN2A-DEE and Refractory Seizures and Recurrent Status Epilepticus 1.526. Clinical Updates from the Elsunersen Emergency Use Program: A Novel ASO for Treatment of Early Onset SCN2A Developmental and Epileptic Encephalopathy 1.527. Establishing the Predictive Validity of Preclinical Seizure Models in Generalized Epilepsies: An Extension of the Praxis Analysis of Concordance Framework 1.528. Relutrigine Demonstrates Robust Seizure Reduction and Seizure Freedom in DEEs: Results from the EMBOLD Study Materials will be made available on the Resources page of the Praxis website following presentation at AES 2024: https://praxismedicines.com/resources/. Scientific Exhibit Praxis Precision Medicines: Revolutionizing Therapy in Epilepsy Monday December 9, 2:00 p.m. – 5:00 p.m. PSTLocation: Room 403B, Level 2 About Relutrigine (PRAX-562)Relutrigine is a first-in-class small molecule in development for the treatment of developmental and epileptic encephalopathies (DEEs) as a preferential inhibitor of persistent sodium current, shown to be a key driver of seizure symptoms in severe DEEs. Relutrigine’s mechanism of precision sodium channel (NaV) modulation is consistent with superior selectivity for disease-state NaV channel hyperexcitability. In vivo studies of relutrigine have demonstrated dose-dependent inhibition of seizures up to complete control of seizure activity in SCN2A, SCN8A and other DEE mouse models. Relutrigine has been generally well-tolerated in three Phase 1 studies and has demonstrated biomarker changes indicative of NaV channel modulation. Data from the Phase 2 EMBOLD study demonstrated in a heavily pre-treated population a well-tolerated, robust, short- and long-term improvement in motor seizures alongside maintained seizure freedom in some patients with SCN2A- and SCN8A-DEE. Relutrigine has received Orphan Drug Designation (ODD) and Rare Pediatric Disease Designation from the FDA, and ODD from the European Medicines Agency for the treatment of SCN2A-DEE and SCN8A-DEE. To learn more about the EMBOLD study, please visit https://www.emboldstudy.com/. About Vormatrigine (PRAX-628)Vormatrigine is a next-generation, functionally selective small molecule targeting the hyperexcitable state of NaV channels in the brain that is currently being developed as a once daily, oral treatment for adult focal onset seizures and generalized epilepsy. Preclinical data demonstrates vormatrigine is differentiated from standard of care, with the potential to be best-in-class for focal onset seizures. In vitro, vormatrigine has demonstrated superior selectivity for disease-state NaV channel hyperexcitability. In vivo studies of vormatrigine have demonstrated unprecedented potency in the maximal electroshock seizure (MES) model, a highly predictive translational model for efficacy in focal epilepsy. Data from the PRAX-628-101 study demonstrated that vormatrigine can be safely dosed in healthy subjects to greater than 15 times the predicted human equivalent of the rodent MES EC50, a translational indicator that suggests a therapeutic window with unprecedented magnitude relative to approved therapies. About Elsunersen (PRAX-222)Elsunersen is an antisense oligonucleotide (ASO) designed to selectively decrease SCN2A gene expression, directly targeting the underlying cause of early-onset SCN2A-DEE to treat seizures and other symptoms in patients with gain-of-function SCN2A mutations. In vitro studies of elsunersen have demonstrated reduction in both SCN2A gene expression and protein levels. In vivo, elsunersen has demonstrated significant, dose-dependent reduction in seizures, improvement in behavioral and locomotor activity and increased survival in SCN2A mouse models. Data from the EMBRAVE study demonstrated well-tolerated, significant and sustained seizure reduction in patients with SCN2A-DEE. Elsunersen has received Orphan Drug Designation (ODD) and Rare Pediatric Disease Designation (RPD) from the FDA, and ODD and PRIME designations from the European Medicines Agency (EMA) for the treatment of SCN2A-DEE. The Elsunersen program is ongoing under a collaboration with Ionis Pharmaceuticals, Inc. (NASDAQ: IONS), and RogCon, Inc. To learn more about the EMBRAVE study, please visit https://www.embravestudy.org/. About Praxis  Praxis Precision Medicines is a clinical-stage biopharmaceutical company translating insights from genetic epilepsies into the development of therapies for CNS disorders characterized by neuronal excitation-inhibition imbalance. Praxis is applying genetic insights to the discovery and development of therapies for rare and more prevalent neurological disorders through our proprietary small molecule platform, Cerebrum™, and antisense oligonucleotide (ASO) platform, Solidus™, using our understanding of shared biological targets and circuits in the brain. Praxis has established a diversified, multimodal CNS portfolio including multiple programs across movement disorders and epilepsy, with four clinical-stage product candidates. For more information, please visit www.praxismedicines.com and follow us on Facebook, Instagram, LinkedIn and Twitter/X.