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Eiger BioPharmaceuticals Sells Priority Review Voucher for $95 Million

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Eiger BioPharmaceuticals (Nasdaq:EIGR) announced the sale of its Priority Review Voucher (PRV) for $95 million. Eiger will receive 50% of the proceeds, totaling $47.5 million, as per its agreement with The Progeria Research Foundation. The PRV was granted following the FDA approval of Zokinvy™ (lonafarnib) for Progeria treatment. This sale provides Eiger with non-dilutive capital, enhancing its balance sheet and allowing better access to Zokinvy for affected children globally. The transaction is subject to standard closing conditions.

Positive
  • Sale of Priority Review Voucher for $95 million enhances liquidity.
  • Eiger retains $47.5 million, aiding in funding for Zokinvy accessibility.
  • Strengthens balance sheet for advancing late-stage pipeline.
Negative
  • None.

PALO ALTO, Calif., Nov. 23, 2020 /PRNewswire/ -- Eiger BioPharmaceuticals, Inc. (Nasdaq:EIGR), focused on the development and commercialization of targeted therapies for serious rare and ultra-rare diseases, today announced that it has entered into a definitive agreement to sell its Priority Review Voucher (PRV) for a lump sum payment of $95 million.  Eiger will retain fifty percent of the proceeds, or $47.5 million, under the terms of the Collaboration and Supply Agreement with The Progeria Research Foundation (PRF).

The PRV was granted in conjunction with the recent approval by the U.S. Food and Drug Administration of ZokinvyTM (lonafarnib) for treatment of Progeria and processing-deficient Progeroid Laminopathies.  The transaction remains subject to customary closing conditions, including anti-trust review.

"The sale of the PRV provides Eiger with an important source of non-dilutive capital and further strengthens our balance sheet.  The proceeds allow us to continue to ensure that all diagnosed children and young adults worldwide with Progeria and processing-deficient Progeroid Laminopathies have access to Zokinvy and to advance our late-stage pipeline that now includes three breakthrough therapy designated programs," said David Cory, President and CEO of Eiger.  "We are proud that Zokinvy is our first approved product and the first approved therapy for children and young adults with Progeria and processing-deficient Progeroid Laminopathies."

For full prescribing information, visit www.zokinvy.com.

About Zokinvy (lonafarnib)
Zokinvy blocks the accumulation of defective, farnesylated proteins which form tight associations with the nuclear envelope, leading to cellular instability and the process of premature aging in children and young adults with Progeria and processing-deficient Progeroid Laminopathies.

Eiger licensed exclusive worldwide rights to lonafarnib from Merck, known as MSD outside of the United States and Canada.  Merck will not receive any milestone payments for the development of lonafarnib for the treatment of Progeria, and has waived royalty obligations from Eiger for a specified quantity of lonafarnib.

INDICATION
ZOKINVY is indicated in adult and pediatric patients 12 months of age and older with a body surface area (BSA) of 0.39 m2 and above:

  • To reduce the risk of mortality in Hutchinson-Gilford Progeria Syndrome (HGPS)
  • For the treatment of processing-deficient Progeroid Laminopathies with either:
    • Heterozygous LMNA mutation with progerin-like protein accumulation
    • Homozygous or compound heterozygous ZMPSTE24 mutations

Limitations of Use
ZOKINVY is not indicated for use in patients with non-HGPS Progeroid Syndromes or with Progeroid Laminopathies known to be processing-proficient. Based upon its mechanism of action, ZOKINVY would not be expected to be effective in these populations.

Contraindications

  • Strong or moderate CYP3A inhibitors or inducers
  • Midazolam
  • Lovastatin, simvastatin, and atorvastatin

IMPORTANT SAFETY INFORMATION

  • The most common adverse reactions are vomiting (90%), diarrhea (81%), infection (78%), nausea (56%), decreased appetite (53%), fatigue (51%), upper respiratory tract infection (51%), abdominal pain (48%), musculoskeletal pain (48%), electrolyte abnormalities (43%), headache (37%), decreased weight (37%), increased aspartate aminotransferase (35%), myelosuppression (35%), cough (33%), decreased blood bicarbonate (33%), hypertension (29%), and increased alanine aminotransferase (27%).

Gastrointestinal Adverse Reactions

  • Gastrointestinal adverse reactions were the most frequently reported adverse reactions. Of the 57 patients (90%) that experienced vomiting, 30 (53%) patients had mild vomiting, 26 (46%) patients had moderate vomiting, and 1 (2%) patient had severe vomiting.
  • Of the 35 patients (56%) that experienced nausea, 34 (97%) patients had mild nausea and 1 (3%) patient had moderate nausea.
  • Of the 51 patients (81%) that experienced diarrhea, the majority of patients (92%) experienced mild or moderate diarrhea; 38 (75%) patients reported mild diarrhea and 9 (18%) patients reported moderate diarrhea. Four (8%) patients reported severe diarrhea.
  • Loss of fluids and dehydration can be severe, leading to hospitalization. As a result, patients should receive therapy for diarrhea at the earliest signs in order to avoid possible severe complications.

Alanine Aminotransferase and Aspartate Aminotransferase Elevations

  • Increased alanine aminotransferase was commonly reported (17 [27%] patients). Of the 17 patients with increased alanine aminotransferase, 14 (82%) patients had mild increases, 1 (6%) patient had moderate increases, and 2 (12%) patients had severe increases.
  • Increased aspartate aminotransferase was also commonly reported (22 [35%] patients). Of the 22 patients with increased aspartate aminotransferase, 21 (95%) patients had mild increases and 1 (5%) patient had a severe increase.

Hypertension

  • Increases in blood pressure have been documented in patients treated with ZOKINVY. At baseline 22 (35%) patients had either a systolic blood pressure or a diastolic blood pressure or both above the 95th percentile. Over the course of the trials, 18 (29%) patients had hypertension based on systolic blood pressure or diastolic blood pressure measurements above the 95th percentile on 3 or more occasions. Five (8%) patients who were normotensive at baseline had either systolic blood pressure or diastolic blood pressure above the 95th percentile at the end of treatment.

Ophthalmic Adverse Reactions

  • Lonafarnib caused retinal toxicity in monkeys at 3.7 times the human dose based on plasma drug exposure, but not at 2.1 times the human dose.

Laboratory Abnormalities
Some patients treated with ZOKINVY developed laboratory abnormalities. These included:

  • Electrolyte abnormalities (43%), such as hyperkalemia, hypokalemia, hyponatremia, or hypercalcemia
  • Myelosuppression (35%), such as reductions in absolute neutrophil count, white blood cell counts, lymphopenia, hemoglobin, or hematocrit
  • Increased liver enzymes, such as aspartate aminotransferase (35%), or alanine aminotransferase (27%)

These laboratory abnormalities often improved while continuing ZOKINVY, but it is not possible to exclude ZOKINVY as a cause of the abnormalities. Periodically monitor electrolytes, complete blood counts, and liver enzymes, and manage abnormalities accordingly.

Nephrotoxicity

  • Lonafarnib caused nephrotoxicity in rats at plasma drug exposures approximately equal to that achieved with the human dose.  Monitor renal function at regular intervals during ZOKINVY therapy.

Retinal Toxicity

  • Lonafarnib caused rod-dependent, low-light vision decline in monkeys at plasma drug exposures similar to that achieved with the human dose.  Perform ophthalmological evaluation at regular intervals and at the onset of any new visual changes during ZOKINVY therapy.

Impaired Fertility

  • Lonafarnib caused impaired fertility in female rats at 1.2 times the human dose based on plasma drug exposure. 
  • Lonafarnib caused impaired fertility and testicular toxicity in male rats at 1.5 times the human dose based on plasma drug exposure, and toxicity in the male reproductive tract in monkeys at doses lower than the human dose based on plasma drug exposure.

About Eiger
Eiger is a commercial-stage biopharmaceutical company focused on the development and commercialization of first-in-class, well-characterized drugs for serious rare and ultra-rare diseases for patients with high unmet medical needs.

Zokinvy for the treatment of Hutchinson-Gilford Progeria Syndrome (HGPS or Progeria) and processing-deficient Progeroid Laminopathies is the Company's first FDA approval.  A Marketing Authorization Application (MAA) has been accepted and is under review by the European Medicines Agency (EMA).  Outside the U.S., Eiger's established global Managed Access Program, expected to span greater than 40 countries, ensures all children and young adults with Progeria and Progeroid Laminopathies have access to treatment.

Eiger's lead clinical programs target Hepatitis Delta Virus (HDV) infection, the most serious form of human viral hepatitis.  Eiger is developing two complementary treatments for HDV.  Lonafarnib is a first-in-class, oral prenylation inhibitor in a global Phase 3 trial.  Peginterferon lambda is a first-in-class, well-tolerated type III interferon entering Phase 3.

For additional information about Eiger and its clinical programs, please visit www.eigerbio.com

Note Regarding Forward-Looking Statements
This press release contains "forward-looking" statements that involve substantial risks and uncertainties. All statements other than statements of historical facts, including statements regarding our future financial condition, timing for and outcomes of clinical results, business strategy and plans and objectives for future operations, are forward-looking statements. These forward-looking statements include terminology such as "believe," "will," "may," "estimate," "continue," "anticipate," "contemplate," "intend," "target," "project," "should," "plan," "expect," "predict," "could," "potentially" or the negative of these terms. Forward-looking statements are our current statements regarding our intentions, beliefs, projections, outlook, analyses or current expectations concerning, among other things, our anticipating significant milestones in 2020 and 2021, the timing of our ongoing and planned clinical development, including our ability to support the launch of a new product and ship to specialty pharmacies; our development programs for Zokinvy generally; and the potential approval of Zokinvy in jurisdictions outside of the U.S., including the EU; the risks related to the commercialization of Zokinvy, our ability to manufacture sufficient quantities of Zokinvy, and the commercial launch of Zokinvy in the U.S., the market potential for Zokinvy as a treatment for Progeria and processing-deficient Progeroid Laminopathies; our progression and enrollment of our Phase 3 D-LIVR study in HDV; our ability to maintain supply of our commercial and clinical trial materials; our plans to advance Lambda in HDV in the U.S. and EU; our ability to transition into a commercial stage biopharmaceutical company; our ability to finance the continued advancement of our development pipeline products; and the potential for success of any of our product candidates. These statements concern product candidates that have not yet been approved for marketing by the U.S. Food and Drug Administration (FDA). No representation is made as to their safety or effectiveness for the purposes for which they are being investigated. Various important factors could cause actual results or events to differ materially from the forward-looking statements that Eiger makes, including additional applicable risks and uncertainties described in the "Risk Factors" sections in the Quarterly Report on Form 10-Q for the quarter ended September 30, 2020 and Eiger's subsequent filings with the SEC. The forward-looking statements contained in this press release are based on information currently available to Eiger and speak only as of the date on which they are made. Eiger does not undertake and specifically disclaims any obligation to update any forward-looking statements, whether as a result of any new information, future events, changed circumstances or otherwise.

Investors and Media:
Sri Ryali
CFO
(650) 272-6138
sryali@eigerbio.com

 

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SOURCE Eiger BioPharmaceuticals, Inc.

FAQ

What is the significance of Eiger's Priority Review Voucher sale?

The sale provides Eiger with $95 million, bolstering its financial position without diluting shareholder equity.

How much will Eiger receive from the Priority Review Voucher sale?

Eiger will receive $47.5 million from the Priority Review Voucher sale.

What was the recent approval related to Eiger's Zokinvy?

Zokinvy was recently approved by the FDA for treating Progeria and processing-deficient Progeroid Laminopathies.

What will the proceeds from the PRV sale be used for?

The proceeds will help ensure access to Zokinvy for diagnosed children and support Eiger's late-stage pipeline.

What are the terms of Eiger's agreement with The Progeria Research Foundation?

Under the Collaboration and Supply Agreement, Eiger retains 50% of the PRV sale proceeds.

Eiger BioPharmaceuticals, Inc.

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