News Release Details

-SUSTOL has potential to be the first 5-HT₃ antagonist approved for delayed nausea and vomiting associated with highly emetogenic chemotherapy

REDWOOD CITY, Calif.--(BUSINESS WIRE)--Jul. 20, 2015-- Heron Therapeutics, Inc. (NASDAQ:HRTX), a biotechnology company focused on improving the lives of patients by developing best-in-class medicines that address major unmet medical needs, today announced that it has resubmitted its New Drug Application (NDA) for SUSTOL^® (granisetron) Injection, extended release, for the prevention of acute and delayed chemotherapy-induced nausea and vomiting (CINV) associated with moderately emetogenic chemotherapy (MEC) or highly emetogenic chemotherapy (HEC) regimens, to the U.S. Food and Drug Administration (FDA). Heron expects confirmation of acceptance from the FDA and a Prescription Drug User Fee Act (PDUFA) goal date within the next few weeks. The Company anticipates a six-month review by the FDA.

The NDA filing includes data from the MAGIC study, Heron’s recently completed, multi-center, placebo-controlled, Phase 3 study in patients receiving HEC agents. The MAGIC study evaluated the efficacy and safety of SUSTOL as part of a three-drug regimen with the intravenous (IV) neurokinin-1 (NK₁) receptor antagonist fosaprepitant and the IV/oral corticosteroid dexamethasone for the prevention of delayed nausea and vomiting in patients receiving HEC. The MAGIC study, which was conducted entirely in the U.S. using the 2011 ASCO guidelines for classification of emetogenic potential, is the only Phase 3 CINV study to-date to use the currently recommended, standard-of-care, three-drug regimen for CINV prophylaxis in a HEC population as the comparator: a 5-HT₃ receptor antagonist, fosaprepitant and dexamethasone.

The MAGIC study’s primary endpoint was achieved. Specifically, the percentage of patients who achieved a Complete Response was significantly higher in the SUSTOL arm compared with the comparator arm (p=0.014). Significant benefit was also observed in the reduction in episodes of nausea, which has the greatest impact on patient quality of life. Data from a previous Phase 3 study of more than 1,300 patients, which was previously submitted to the FDA, demonstrated SUSTOL’s efficacy in the prevention of acute and delayed CINV associated with MEC regimens and acute CINV associated with HEC regimens.

“The rapid resubmission of the NDA for SUSTOL, the first and only 5-HT₃ receptor antagonist with extended-release technology and 5-day CINV prevention in both MEC and HEC, is a major milestone for Heron Therapeutics,” commented Barry D. Quart, Pharm.D., Chief Executive Officer of Heron. “We look forward to working closely with the FDA during the SUSTOL NDA review period, as we believe SUSTOL has the potential to improve the lives of patients suffering from CINV by significantly reducing both nausea and vomiting associated with MEC or HEC regimens.”

About SUSTOL^® for Chemotherapy-Induced Nausea and Vomiting

SUSTOL^® (granisetron) Injection, extended release, which utilizes Heron’s proprietary Biochronomer® drug delivery technology, is Heron’s novel, long-acting formulation of granisetron for the prevention of chemotherapy-induced nausea and vomiting (CINV). Granisetron, an FDA-approved 5-hydroxytryptamine type 3 (5-HT₃) receptor antagonist was selected due to its broad use by physicians based on a well-established record of safety and efficacy. SUSTOL has been shown to maintain therapeutic drug levels of granisetron for five days with a single subcutaneous injection. SUSTOL is being developed for the prevention of both acute (day 1 following the administration of chemotherapy agents) and delayed (days 2-5 following the administration of chemotherapy agents) CINV associated with moderately emetogenic chemotherapy (MEC) or highly emetogenic chemotherapy (HEC). While other 5-HT₃ antagonists are approved for the prevention of CINV, SUSTOL is the first agent in the class to demonstrate efficacy in reducing the incidence of delayed CINV in patients receiving HEC, a major unmet medical need, in a randomized Phase 3 study.

Affecting 70-80% of patients undergoing chemotherapy, CINV is one of the most debilitating side effects of such treatments, often attributed as a leading cause of premature discontinuation of cancer treatment. 5-HT₃ receptor antagonists have been shown to be among the most effective and preferred treatments for CINV. However, an unmet medical need exists for patients suffering from CINV during the delayed phase, which occurs on days 2-5 following the administration of chemotherapy agents. Only one 5-HT₃ receptor antagonist is approved for the prevention of delayed CINV associated with MEC, and no 5-HT₃ receptor antagonists are approved for prevention of delayed CINV associated with HEC.

SUSTOL was the subject of a recently completed, multi-center, placebo-controlled, Phase 3 clinical study in patients receiving HEC regimens known as MAGIC. The MAGIC study evaluated the efficacy and safety of SUSTOL as part of a three-drug regimen with the intravenous (IV) neurokinin-1 (NK₁) receptor antagonist fosaprepitant and the IV/oral corticosteroid dexamethasone. The MAGIC study, which was conducted entirely in the U.S. using the 2011 ASCO guidelines for classification of emetogenic potential, is the only Phase 3 CINV prophylaxis study in a HEC population performed to date to use the currently recommended, standard-of-care, three-drug regimen as a comparator: a 5-HT₃ receptor antagonist, fosaprepitant, and dexamethasone. The study's primary endpoint was achieved. Specifically, the percentage of patients who achieved a Complete Response in the delayed phase was significantly higher in the SUSTOL arm compared with the comparator arm (p=0.014). Heron resubmitted its New Drug Application (NDA) for SUSTOL to the U.S. Food and Drug Administration (FDA) in July 2015. SUSTOL is not approved by the FDA or any other regulatory authority.

About Heron Therapeutics, Inc.

Heron Therapeutics, Inc. is a biotechnology company focused on improving the lives of patients by developing best-in-class medicines that address major unmet medical needs. Heron is developing novel, patient-focused solutions that apply its innovative science and technologies to already-approved pharmacological agents. Heron’s goal is to build on therapeutics with well-known pharmacology by improving their tolerability and efficacy as well as broadening their potential field of use. Heron is currently developing four pharmaceutical products for patients suffering from cancer and pain. SUSTOL^® is Heron’s injectable, extended-release formulation of granisetron that is being developed for the prevention of both acute and delayed chemotherapy-induced nausea and vomiting (CINV) associated with moderately emetogenic chemotherapy (MEC) or highly emetogenic chemotherapy (HEC). CINV is one of the most debilitating side effects of chemotherapy and is a leading cause of premature discontinuation of cancer treatment. Heron recently reported positive, top-line results from its Phase 3 MAGIC study and resubmitted its New Drug Application (NDA) for SUSTOL to the U.S. Food and Drug Administration (FDA) in July 2015. HTX-019, also being developed for the prevention of CINV, has the potential to become the first polysorbate 80-free, intravenous formulation of aprepitant, a neurokinin-1 (NK₁) receptor antagonist. Heron intends to file an NDA for HTX-019 using the 505(b)(2) regulatory pathway in the second half of 2016. HTX-011, Heron’s long-acting formulation of the local anesthetic bupivacaine in a fixed-dose combination with the anti-inflammatory meloxicam, is in a Phase 2 trial for the prevention of post-operative pain. Heron expects to report results from this trial in the second half of 2015. HTX-003, a long-acting formulation of buprenorphine, is being developed for the potential management of chronic pain and opioid addiction. All of Heron’s product candidates utilize Heron’s innovative science and technology platforms, including its proprietary Biochronomer^® drug delivery technology, which can deliver therapeutic levels of a wide range of otherwise short-acting pharmacological agents over a period of days to weeks with a single injection.

For more information, visit www.herontx.com.

Forward Looking Statements

This news release contains "forward-looking statements" as defined by the Private Securities Litigation Reform Act of 1995. Heron cautions readers that forward-looking statements are based on management’s expectations and assumptions as of the date of this news release and are subject to certain risks and uncertainties that could cause actual results to differ materially. These risks and uncertainties include, but are not limited to, those associated with: the acceptance of the Company’s resubmission of its New Drug Application (NDA) for SUSTOL^®, whether the U.S. Food and Drug Administration (FDA) approves the SUSTOL NDA as submitted or supports as broad of a labeled indication for SUSTOL as requested, the progress in the research and development of HTX-019, HTX-011, HTX-003 and our other programs, including the timing of preclinical, clinical, and manufacturing activities, safety and efficacy results from our studies that may not justify the pursuit of further development of our product candidates, the launch and acceptance of SUSTOL and new products generally, our financial position and our ability to raise additional capital to fund operations, if necessary, or to pursue additional business opportunities, strategic business alliances we may pursue or the potential acquisition of products or technologies, and our ability to grow our organization to sustain the commercial launch for SUSTOL, and other risks and uncertainties identified in the Company's filings with the Securities and Exchange Commission. Forward-looking statements reflect our analysis only on their stated date, and Heron takes no obligation to update or revise these statements except as may be required by law.

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Source: Heron Therapeutics, Inc.

Heron Therapeutics, Inc.
Investor Relations Contact:
Jennifer Capuzelo, 858-703-6063
Sr. Manager, Investor Relations
jcapuzelo@herontx.com
Corporate Contact:
Barry D. Quart, 650-366-2626
Pharm D., Chief Executive Officer