Longboard Pharmaceuticals Announces Positive Interim Results from the Open-Label Extension  of the Phase 1b/2a PACIFIC Study Evaluating Bexicaserin in Participants with Developmental and Epileptic Encephalopathies

Longboard Pharmaceuticals Announces Positive Interim Results from the Open-Label Extension of the Phase 1b/2a PACIFIC Study Evaluating Bexicaserin in Participants with Developmental and Epileptic Encephalopathies

  • Bexicaserin achieved an overall median seizure reduction of 56.1% in countable motor seizures over an approximate 6-month treatment period; participants randomized to the PACIFIC placebo group achieved a median seizure reduction of 57.3%
  • Favorable safety and tolerability results observed
  • 100% of participants who completed the PACIFIC Study entered the OLE
  • End of Phase 2 Meeting scheduled for this summer

Longboard Pharmaceuticals, Inc. (Nasdaq: LBPH), a clinical-stage biopharmaceutical company focused on developing novel, transformative medicines for neurological diseases, today announced positive interim results from its ongoing 52-week open-label extension of the PACIFIC Study evaluating bexicaserin (LP352) in participants ages 12-65 years old with Developmental and Epileptic Encephalopathies.

"We are thrilled to see a sustained, durable response in seizure reduction and a favorable safety and tolerability profile across a broad range of DEE patients. Additionally, we saw compelling seizure reduction in the PACIFIC placebo patients who transitioned to bexicaserin in the OLE. These data provide further support to bexicaserin's potential to offer a highly differentiated and best-in-class profile," stated Dr. Randall Kaye, Longboard's Chief Medical Officer.

"Given the tremendous unmet need in patients living with DEEs, we are committed to rapidly advancing the development of bexicaserin. We expect to provide additional analyses of these participants as they progress in the OLE Study and transition to our Expanded Access Program," Dr. Kaye continued. "With an End of Phase 2 meeting scheduled this summer, we remain on track to initiate our global Phase 3 program for bexicaserin later this year."

PACIFIC OLE Study Interim Analysis Results:

The PACIFIC OLE Study is a 52-week Phase 2, open-label, long-term safety study of bexicaserin in participants with a range of DEEs, including Dravet syndrome (n=3), Lennox-Gastaut syndrome (n=20) and DEE Other (n=18), who completed the PACIFIC Study (n=41). The study objectives are to investigate the safety and tolerability of multiple doses of bexicaserin in participants with DEEs, and to analyze the effect of bexicaserin on the frequency of observed countable motor seizures and other seizure types. The interim analysis was conducted when participants reached the approximate 6-month point in the OLE Study.

Summary of Efficacy Results:

The median change in countable motor seizure frequency for participants in the OLE Study over an approximate 6-month treatment period was a decrease of 56.1% (n=40) from their baseline entering the PACIFIC Study.

The median change in countable motor seizure frequency from baseline for:

  • participants randomized to the bexicaserin-treated group in the PACIFIC Study was a decrease of 54.9% (n=31)
  • participants randomized to the placebo group in the PACIFIC Study that transitioned to bexicaserin in the OLE was a decrease of 57.3% (n=9)

Summary of Safety and Tolerability Results:

Favorable safety and tolerability results were observed in this study. 100% of PACIFIC Study completers elected to enroll in the OLE with 95.1% (39 out of 41) remaining in the ongoing open-label study. One participant discontinued due to the adverse event (AE) of lethargy and one participant discontinued by withdrawal of consent. The most common treatment emergent AEs in the overall group (n=41) occurring in >5% of patients were upper respiratory tract infections, COVID-19, pneumonia, sinusitis, seizures, and decreased appetite.

ABOUT THE PACIFIC STUDY AND THE OLE STUDY

The PACIFIC Study is a Phase 1b/2a double-blind, placebo-controlled clinical trial to assess the safety, tolerability, efficacy and pharmacokinetics of bexicaserin (LP352) in 52 participants between the ages of 12 and 65 years old with DEEs at 34 sites across the United States and Australia. Following a 5-week screening period and baseline evaluations, study participants initiated a dose titration over a 15-day period and subsequently continued on the highest tolerated dose throughout the maintenance period of 60 days. Following the maintenance period, participants were then titrated down, and eligible participants were given the opportunity to enroll in a 52-week open-label extension study.

ABOUT LONGBOARD PHARMACEUTICALS

Longboard Pharmaceuticals, Inc. is a clinical-stage biopharmaceutical company focused on developing novel, transformative medicines for neurological diseases. Longboard is working to advance a portfolio of centrally acting product candidates designed to be highly selective for specific G protein-coupled receptors (GPCRs). Longboard's small molecule product candidates are based on more than 20 years of GPCR research. Longboard plans to advance bexicaserin (LP352), an oral, centrally acting 5-hydroxytryptamine 2C (5-HT2C) receptor superagonist, with no observed impact on 5-HT2B and 5-HT2A receptor subtypes, into a global Phase 3 program. Longboard recently reported positive topline data from a Phase 1b/2a clinical trial (the PACIFIC Study) evaluating bexicaserin in participants ages 12 to 65 years old with Developmental and Epileptic Encephalopathies (DEEs), including Lennox-Gastaut syndrome, Dravet syndrome and other DEEs. Longboard is also evaluating LP659, an oral, centrally acting, sphingosine-1-phosphate (S1P) receptor subtypes 1 and 5 modulator, which is in development for the potential treatment of rare neuroinflammatory conditions. Longboard is conducting a Phase 1 single-ascending dose (SAD) clinical trial for LP659 in healthy volunteers, with topline data expected in the second quarter of 2024.

FORWARD-LOOKING STATEMENTS

Certain statements in this press release are forward-looking statements that involve a number of risks and uncertainties. In some cases, you can identify forward-looking statements by words such as "focus", "potential", "expect", "committed to", "scheduled", "remain on track", "working to", "designed to", "plans", "will", or the negative, plural or other tenses of these words, references to future dates or time periods, or other comparable language, and they may include, without limitation, statements about the following: Longboard's clinical and preclinical product candidates and programs, including their potential (including for bexicaserin to be differentiated and to have a best-in-class profile), advancement, timing of initiating clinical trials (including a global Phase 3 program for bexicaserin), timing of topline data from clinical trials (including the Phase 1 SAD data for LP659), , the end of Phase 2 meeting, the ability of patients to progress in the OLE Study and transition to an expanded access program, and their design and characteristics; Longboard's ability to develop product candidates and deliver medicines; and Longboard's focus and work. For such statements, Longboard claims the protection of the Private Securities Litigation Reform Act of 1995. Actual events or results may differ materially from Longboard's expectations. Factors that could cause actual results to differ materially from those stated or implied by Longboard's forward-looking statements include, but are not limited to, the following: risk that topline or interim data may not accurately reflect the complete results of a particular study or trial, and that final data may differ materially from topline or interim data; PACIFIC Study participants' diagnoses are as of time of screening and are subject to change; risks related to Longboard's limited operating history, financial position and need for additional capital; Longboard's need for additional managerial and financial resources to advance all of its programs, and you and others may not agree with the manner Longboard allocates its resources; risks related to the development and commercialization of Longboard's product candidates; Longboard's product candidates are in the early to middle phases of a lengthy research and development process, the timing, manner and outcome of research, development and regulatory review is uncertain, and Longboard's product candidates may not advance in research or development or be approved for marketing; results of clinical trials and other studies are subject to different interpretations and may not be predictive of future results; enrolling participants in Longboard's ongoing and intended clinical trials is competitive and challenging; risks related to unexpected or unfavorable new data; nonclinical and clinical data is voluminous and detailed, and regulatory agencies may interpret or weigh the importance of data differently and reach different conclusions than Longboard or others, request additional information, have additional recommendations or change their guidance or requirements before or after approval; macroeconomic events and their impact on Longboard's clinical trials and operations, the operations of Longboard's suppliers, partners, collaborators, and licensees, and capital markets; risks related to relying on licenses or collaborative arrangements; other risks related to Longboard's dependence on third parties; competition; product liability or other litigation or disagreements with others; government and third-party payor actions, including relating to reimbursement and pricing; risks related to regulatory compliance; and risks related to Longboard's and third parties' intellectual property rights. Additional factors that could cause actual results to differ materially from those stated or implied by Longboard's forward-looking statements are disclosed in Longboard's filings with the Securities and Exchange Commission (SEC). These forward-looking statements represent Longboard's judgment as of the time of this release. Longboard disclaims any intent or obligation to update these forward-looking statements, other than as may be required under applicable law.

CORPORATE CONTACT:  
Megan E. Knight
VP, Head of Investor Relations
IR@longboardpharma.com
858.789.9283

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  • BOTOX ® Cosmetic Will Provide 250 Entrepreneurs with Access to New Resources and Opportunities and Will Award 20 Grants Worth $20,000 Each to Support Business Goals.
  • By 2030, BOTOX ® Cosmetic Pledges to Empower 50,000 Entrepreneurs, Helping to Close the Confidence Gap.

- Allergan Aesthetics, an AbbVie company (NYSE: ABBV), today announced BOTOX ® Cosmetic's continued commitment to closing the Confidence Gap with the introduction of The Confidence Project: Empowering Women Entrepreneurs . The one & only BOTOX ® Cosmetic invites business owners to apply for this year's program starting today through May 9, 2025 at 11:59pm PT .

BOTOX® Cosmetic (onabotulinumtoxinA) Continues its Mission of Empowering Entrepreneurs Through

Women entrepreneurs continue to break barriers in the business world, with increasing efforts to close the Confidence Gap. When women founders are supported by mentors and have access to capital, they become agents of change. Seventy-one percent of businesswomen said their mentor was influential in their career advancement, with many using their income to uplift their families and community. 1

Since 2023, BOTOX ® Cosmetic has provided a total of $1 million dollars in grant funding across more than 40 founders, along with coaching and networking opportunities. This year, BOTOX ® Cosmetic is expanding to reach more founders by providing 250 entrepreneurs with access to The Confidence Project. Through a partnership with Hello Alice, an online platform that helps businesses launch and grow, each of the 250 entrepreneurs will participate in an intensive "Boostcamp" program, which will provide participants with skill-building, mentorship resources, and exclusive networking opportunities. After completing the course, they will leverage their newfound skills to pitch their business to a panel of aesthetic entrepreneurs, as well as key business leaders from Allergan Aesthetics and Hello Alice, for a chance to receive one of 20 $20,000 grants from BOTOX ® Cosmetic.

"BOTOX ® Cosmetic is committed to being a catalyst for confidence, whether that be by pursuing education, aesthetic treatment, or your entrepreneurial goals. Through The Confidence Project, we pledge to continue to uplift founders who've invested so much in their businesses," said Nicole Katz , Vice President, Customer Engagement and Corporate Affairs at Allergan Aesthetics. "We know when women have access to resources and capital, there's no limit to what they can achieve. We look forward to getting to know this year's cohort of founders and how they found the confidence to pursue their dreams."

"Our mission at Hello Alice is to help entrepreneurs access the funding, mentorship, and resources they need to succeed. BOTOX ® Cosmetic's The Confidence Project provides a powerful opportunity for women entrepreneurs to scale their businesses and create lasting change," said Elizabeth Gore , Co-Founder and President of Hello Alice. "Our partnership with BOTOX ® Cosmetic aims to foster long-term growth, confidence, and leadership for future generations of women in business, by investing in their success today."

Business owners and their cofounders interested in applying to The Confidence Project are encouraged to visit www.botoxcosmetic.com/realimpact . Applicants must agree to the official rules of the grant program and submissions must be received by May 9, 2025 , at 11:59pm PT . The 250 women entrepreneurs selected to participate in the Hello Alice Boostcamp will be announced in July, and the 20 grant recipients will be announced in October 2025 .

For more information on The Confidence Project, visit www.botoxcosmetic.com/realimpact and follow @botoxcosmetic on Instagram and YouTube .

About Allergan Aesthetics
At Allergan Aesthetics, an AbbVie company, we develop, manufacture, and market a portfolio of leading aesthetics brands and products. Our aesthetics portfolio includes facial injectables, body contouring, plastics, skin care, and more. Our goal is to consistently provide our customers with innovation, education, exceptional service, and a commitment to excellence, all with a personal touch. For more information, visit www.allerganaesthetics.com .

About AbbVie
AbbVie's mission is to discover and deliver innovative medicines and solutions that solve serious health issues today and address the medical challenges of tomorrow. We strive to have a remarkable impact on people's lives across several key therapeutic areas – immunology, oncology, neuroscience, and eye care – and products and services in our Allergan Aesthetics portfolio. For more information about AbbVie, please visit us at www.abbvie.com . Follow @abbvie on LinkedIn   ,   Facebook , Instagram , X (formerly Twitter) , and YouTube .

Approved Uses
BOTOX ® Cosmetic is a prescription medicine that is injected into muscles and used to temporarily improve the look of moderate to severe forehead lines, crow's feet lines, frown lines between the eyebrows, and vertical bands connecting the jaw and neck (platysma bands) in adults.

IMPORTANT SAFETY INFORMATION

BOTOX ® Cosmetic may cause serious side effects that can be life threatening. Get medical help right away if you have any of these problems any time (hours to weeks) after injection of BOTOX ® Cosmetic:

  • Problems swallowing, speaking, or breathing, due to weakening of associated muscles, which can be severe and result in loss of life. You are at the highest risk if these problems are preexisting before injection. Swallowing problems may last for several months.
  • Spread of toxin effects. The effect of botulinum toxin may affect areas away from the injection site and cause serious symptoms, including loss of strength and all-over muscle weakness, double vision, blurred vision and drooping eyelids, hoarseness or change or loss of voice, trouble saying words clearly, loss of bladder control, trouble breathing, and trouble swallowing.

BOTOX ® Cosmetic dosing units are not the same as, or comparable to, any other botulinum toxin product.

There has not been a confirmed serious case of spread of toxin effect when BOTOX ® Cosmetic has been used at the recommended dose to treat frown lines, crow's feet lines, forehead lines, and/or platysma bands.

BOTOX ® Cosmetic may cause loss of strength or general muscle weakness, vision problems, or dizziness within hours to weeks of receiving BOTOX ® Cosmetic. If this happens, do not drive a car, operate machinery, or do other dangerous activities.

Serious and/or immediate allergic reactions have been reported, including itching, rash, red itchy welts, wheezing, asthma symptoms, or dizziness or feeling faint. Get medical help right away if you are wheezing or have asthma symptoms, or if you become dizzy or faint.

Do not receive BOTOX ® Cosmetic if you are allergic to any of the ingredients in BOTOX ® Cosmetic (see Medication Guide for ingredients); had an allergic reaction to any other botulinum toxin product such as Myobloc (rimabotulinumtoxinB), Dysport (abobotulinumtoxinA), Xeomin (incobotulinumtoxinA), Jeuveau (prabotulinumtoxinA-xvfs), Daxxify (daxibotulinumtoxinA-lanm), or Letybo (letibotulinumtoxinA-wlbg); or have a skin infection at the planned injection site. This list may not include all available botulinum toxin products.

Tell your doctor about all your muscle or nerve conditions, such as ALS or Lou Gehrig's disease, myasthenia gravis, or Lambert-Eaton syndrome, as you may be at increased risk of serious side effects, including difficulty swallowing and difficulty breathing, from standard doses of BOTOX ® Cosmetic.

Tell your doctor about all your medical conditions, including surgery or plans to have surgery on your face, trouble raising your eyebrows, drooping eyelids, any other abnormal facial change, are pregnant or plan to become pregnant (it is not known if BOTOX ® Cosmetic can harm your unborn baby), or are breastfeeding or plan to (it is not known if BOTOX ® Cosmetic passes into breast milk).

Tell your doctor about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Using BOTOX ® Cosmetic with certain other medicines may cause serious side effects. Do not start any new medicines until you have told your doctor that you have received BOTOX ® Cosmetic in the past.

Tell your doctor if you have received any other botulinum toxin product in the last 4 months; have received injections of botulinum toxin such as Myobloc, Dysport, Xeomin, Jeuveau, Daxxify, or Letybo in the past (tell your doctor exactly which product you received); have recently received an antibiotic by injection; take muscle relaxants; take an allergy or cold medicine; take a sleep medicine; or take aspirin-like products or blood thinners.

Other side effects of BOTOX ® Cosmetic include dry mouth; discomfort or pain at the injection site; tiredness; headache; neck pain; and eye problems, including double vision, blurred vision, decreased eyesight, drooping eyelids and eyebrows, swelling of eyelids, and dry eyes.

For more information, refer to the Medication Guide or talk with your doctor.

To report a side effect, please call Allergan Aesthetics at 1-800-678-1605.

Please see BOTOX ® Cosmetic full Prescribing Information , including Boxed Warning and Medication Guide .

References:

  1. Barbara Kurshan. Forbes.com. Purpose-Driven Women: Unleash Your Potential Through Mentorship. 2023 https://www.forbes.com/sites/barbarakurshan/2023/06/13/purpose-driven-women-unleash-your-potential-through-mentorship/

© 2025 AbbVie. All rights reserved. BOTOX Cosmetic and its designs are trademarks of Allergan Holdings France SAS, an AbbVie company, or its affiliates.

Contacts:

Investors:
Liz Shea
Liz.Shea@AbbVie.com
(847) 935-2211

Media:
Ember Garrett
Ember.Garrett@allergan.com
(714) 246-3525

Business owners and their cofounders interested in applying to The Confidence Project are encouraged to visit www.botoxcosmetic.com/realimpact.

Allergan Aesthetics (PRNewsfoto/AbbVie)

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SOURCE AbbVie

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