DURECT Corporation Reports Third Quarter 2024 Financial Results and Provides Business Update

- Seeking to initiate Phase 3 registrational trial for larsucosterol with topline results expected within two years of initiation

- Webcast of Earnings Call Today, November 13at 4:30 p.m. ET

CUPERTINO, Calif., Nov. 13, 2024/PRNewswire/ - DURECT Corporation (Nasdaq: DRRX) today announced financial results for the three months ended September 30, 2024and provided a business update.

"We remain focused on preparations for the Phase 3 trial for larsucosterol in severe alcohol-associated hepatitis (AH), including discussions with U.S. clinical sites and hepatologists, to streamline the initiation process," stated James E. Brown, D.V.M., President and CEO of DURECT. "Our goal is to begin the trial as soon as possible, subject to obtaining sufficient funding, which should enable us to report topline data within two years of trial initiation. If successful, the FDA has agreed that a single Phase 3 trial may be sufficient to support a New Drug Application (NDA). We believe the selected primary endpoint of 90-day survival is clinically meaningful and provides the greatest probability of success based on the Phase 2bAHFIRM data. We look forward to initiating the trial as soon as possible. We believe that larsucosterol, if approved, could provide physicians with a much-needed treatment that could significantly improve the current 90-day mortality rates of approximately 30%."

Recent business highlights and updates:

• DURECT announced details on the design of its planned registrational Phase 3 trial to evaluate the safety and efficacy of larsucosterol for the treatment of patients with severe alcohol-associated hepatitis (AH). The trial will be a randomized, double-blind, placebo-controlled, multi-center study conducted in the U.S. The primary endpoint will be 90-day survival. The trial design incorporates feedback we received from the U.S. FDA during a Type B meeting held under Breakthrough Therapy Designation (BTD) as well as learnings from our prior Phase 2bAHFIRM trial in AH. DURECT's goal is to begin the trial as soon as possible, subject to obtaining sufficient funding, with topline results expected within two years of trial initiation.
• DURECT plans to deliver an oral and two poster presentations at The Liver Meeting 2024, organized by the American Association for the Study of Liver Diseases (AASLD), to be held November 15-19, 2024in San Diego, California. These presentations will showcase additional data from the completed Phase 2bAHFIRM trial which evaluated larsucosterol for the treatment of alcohol-associated hepatitis (AH). The data further support the design of the Company's planned Phase 3 trial of larsucosterol, including the importance of timely treatment in clinical outcomes. Top line data from AHFIRM were previously announced in November 2023.
• On November 8, 2024, DURECT received notice that Innocoll Pharmaceuticals is terminating its license agreement for POSIMIR® (bupivacaine solution), effective in May 2025. Innocoll has committed to transfer all data and know-how related to POSIMIR to DURECT, and the company is evaluating next steps with respect to the commercialization of POSIMIR.

Financial Highlights for Q3 2024:

• Total revenues were $1.9 millionand net loss was $4.3 millionfor the three months ended September 30, 2024compared to total revenues of $1.7 millionand net loss of $3.0 millionfor the three months ended September 30, 2023.
• Cash, cash equivalents and investments were $10.5 millionat September 30, 2024, compared to $29.8 millionat December 31, 2023. Debt at September 30, 2024was $10.5 million, compared to $16.7 millionat December 31, 2023.

Earnings Conference Call
We will host a conference call and webcast today at 4:30 p.m. Eastern Time/1:30 p.m. Pacific Timeto discuss the Third Quarter 2024 results and provide a corporate update:

Participants can use guest dial-in numbers above to reach an operator or they can click the Call me^™ link for instant telephone access to the event (dial-out). The Call me™ link will be made active 15 minutes prior to the scheduled start time.

The live audio webcast of the presentation will be also available on DURECT's homepage at www.durect.com on the "Events" page, under the "Investors" section. If you are unable to participate during the live webcast, the call will be archived on DURECT's website under the same section, following the completion of the call.

About the AHFIRM Trial
AHFIRM was a Phase 2b randomized, double-blind, placebo-controlled, international, multi-center study conducted in subjects with severe alcohol-associated hepatitis (AH) to evaluate the saFety and effIcacy of laRsucosterol treatMent (AHFIRM). The study was comprised of three arms and enrolled 307 patients, with approximately 100 patients in each arm: (1) Placebo, which consists of standard of care, with or without methylprednisolone capsules at the investigators' discretion; (2) larsucosterol (30 mg); and (3) larsucosterol (90 mg). Patients in the larsucosterol arms received the same supportive care without steroids. The primary outcome measure was the 90-day incidence of mortality or liver transplantation for patients treated with larsucosterol compared to those treated with placebo, and the key secondary endpoint was 90-day survival. The Company enrolled patients at clinical trial sites across the U.S., EU, U.K., and Australia. In November 2023, the Company announced topline data for the AHFIRM Trial. Reflecting the life-threatening nature of AH and the lack of therapeutic options, the U.S. Food and Drug Administration (FDA) has granted larsucosterol Fast Track Designation and Breakthrough Therapy Designation for the treatment of AH. For more information, refer to ClinicalTrials.gov Identifier: NCT04563026.

About Alcohol-associated Hepatitis (AH)
AH is an acute form of alcohol-associated liver disease (ALD) associated with long-term heavy alcohol intake, often following a recent period of increased consumption (i.e., a binge). AH is typically characterized by severe inflammation and liver cell damage, potentially leading to life-threatening complications including liver failure, acute kidney injury and multi-organ failure. There are no FDA approved therapies for AH, and a retrospective analysis of 77 studies published between 1971 and 2016, which included data from 8,184 patients, showed the overall mortality from AH was 26% at 28 days, 29% at 90 days and 44% at 180 days. A subsequent global study published in December 2021, which included 85 tertiary centers in 11 countries across 3 continents, prospectively enrolled 2,581 AH patients with a median Model of End-Stage Liver Disease (MELD) score of 23.5, reported mortality at 28 and 90 days of approximately 20% and 31%, respectively. Stopping alcohol consumption is necessary, but frequently not sufficient for recovery in many moderate (defined as MELD scores of 11-20) and severe (defined as MELD scores >20) patients, and therapies that reduce liver inflammation, such as corticosteroids, are limited by contraindications, have not been shown to improve survival at 90 days or one year, and have demonstrated an increased risk of infection. While liver transplantation is becoming more common for ALD patients, including AH patients, the total number of such transplants is still relatively small, and limited by organ availability. Average charges for a liver transplant exceed $875,000, and patients require lifelong immunosuppressive therapy to prevent organ rejection.

About Larsucosterol
Larsucosterol is an endogenous sulfated oxysterol and an epigenetic modulator. Epigenetic regulators are compounds that regulate patterns of gene expression without modifying the DNA sequence. DNA hypermethylation, an example of epigenetic dysregulation, results in transcriptomic reprogramming and cellular dysfunction, and has been reported in many acute (e.g., AH) and chronic diseases (e.g., MASH). As an inhibitor of DNA methyltransferases (DNMT1, DNMT3a and 3b), larsucosterol inhibits DNA methylation, which subsequently modulates expression of genes that are involved in cell signaling pathways associated with stress responses, cell death and survival, and lipid biosynthesis. This may ultimately lead to improved cell survival, reduced inflammation, and decreased lipotoxicity. As an epigenetic modulator, the proposed mechanism of action provides further scientific rationale for developing larsucosterol for the treatment of acute organ injury and certain chronic diseases.

About DURECT Corporation
DURECT is a late-stage biopharmaceutical company pioneering the development of epigenetic therapies that target dysregulated DNA methylation to transform the treatment of serious and life-threatening conditions, including acute organ injury. Larsucosterol, DURECT's lead drug candidate, binds to and inhibits the activity of DNA methyltransferases, epigenetic enzymes that are elevated and associated with hypermethylation found in AH patients. Larsucosterol is in clinical development for the potential treatment of AH, for which the FDA has granted a Fast Track and a Breakthrough Therapy designation; MASH is also being explored. In addition, POSIMIR^®(bupivacaine solution) for infiltration use, a non-opioid analgesic utilizing the innovative SABER^®platform technology, is FDA-approved. For more information about DURECT, please visit www.durect.com and follow us on X (formerly Twitter) at https://x.com/DURECTCorp.

DURECT Forward-Looking Statements
This press release contains forward-looking statements, including statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, relating to: the Company's ability to commence a Phase 3 trial of larsucosterol and report top-line data within two years of initiation, the potential for a single Phase 3 trial of larsucosterol, if successful, to support an NDA filing, and the potential uses and benefits of larsucosterol in patients with AH and potentially other indications. Actual results may differ materially from those contained in the forward-looking statements contained in this press release, and reported results should not be considered as an indication of future performance. The potential risks and uncertainties that could cause actual results to differ from those projected include, among other things, the risks that the Company is unable to raise sufficient capital to commence the Phase 3 trial of larsucosterol in AH, trial enrollment or completion takes longer than anticipated, future clinical trials of larsucosterol are delayed or do not confirm the results from subset analyses of the AHFIRM trial, including geographic or other segmentation, or of earlier clinical or pre-clinical trials, or do not demonstrate the safety or efficacy of larsucosterol in a statistically significant manner; the risk that the FDA or other government agencies may require additional clinical trials for larsucosterol before approving larsucosterol for the treatment of AH, and that larsucosterol may never be approved; and risks related to the sufficiency of our cash resources, our anticipated capital requirements, our need or desire for additional financing, our ability to continue to meet the minimum bid price for continued listing on Nasdaq, our ability to obtain capital to fund our operations and expenses, and our ability to continue to operate as a going concern. Further information regarding these and other risks is included in DURECT's most recent Securities and Exchange Commission (SEC) filings, including its annual report on Form 10-K for the year ended December 31, 2023and quarterly report on Form 10-Q for the quarter ended September 30, 2024, when filed, under the heading "Risk Factors." These reports are available on our website www.durect.com under the "Investors" tab and on the SEC's website at www.sec.gov. All information provided in this press release and in the attachments is based on information available to DURECT as of the date hereof, and DURECT assumes no obligation to update this information as a result of future events or developments, except as required by law.

NOTE: POSIMIR^® is a trademark of Innocoll Pharmaceuticals, Ltd. in the U.S. and a trademark of DURECT Corporation outside of the U.S. SABER^® is a trademark of DURECT Corporation. Other referenced trademarks belong to their respective owners. Larsucosterol is an investigational drug candidate under development and has not been approved for commercialization by the U.S. Food and Drug Administration or other health authorities for any indication.

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