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FDA Approves Cinvanti (aprepitant) Injectable Emulsion for the Prevention of Acute and Delayed Chemotherapy-Induced Nausea and Vomiting (CINV)

FDA Approves Cinvanti (aprepitant) Injectable Emulsion for the Prevention of Acute and Delayed Chemotherapy-Induced Nausea and Vomiting (CINV)

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FDA Approves Cinvanti (aprepitant) Injectable Emulsion for the Prevention of Acute and Delayed Chemotherapy-Induced Nausea and Vomiting (CINV)

SAN DIEGO–(BUSINESS WIRE)–Nov. 9, 2017– Heron Therapeutics, Inc. (Nasdaq: HRTX) (the Company or Heron), a commercial-stage biotechnology company focused on developing novel, best-in-class treatments to address some of the most important unmet patient needs, today announced that the U.S. Food and Drug Administration (FDA) has approved Cinvanti (aprepitant) injectable emulsion, for intravenous infusion. Cinvanti is a substance P/neurokinin-1 (NK1) receptor antagonist, indicated in adults, in combination with other antiemetic agents, for the prevention of acute and delayed nausea and vomiting associated with initial and repeat courses of highly emetogenic cancer chemotherapy (HEC) including high-dose cisplatin and nausea and vomiting associated with initial and repeat courses of moderately emetogenic cancer chemotherapy (MEC).

Cinvanti is the first and only polysorbate 80-free, intravenous formulation of an NK1 receptor antagonist indicated for the prevention of acute and delayed CINV. Cinvanti is the first intravenous formulation to directly deliver aprepitant, the active ingredient in Emend® capsules. Aprepitant (including its prodrug, fosaprepitant) is the only single-agent NK1 receptor antagonist to significantly reduce CINV in both the acute phase (0 – 24 hours after chemotherapy) and the delayed phase (24 – 120 hours after chemotherapy).i,ii Cinvanti does not contain polysorbate 80 or any other synthetic surfactant. Pharmaceutical formulations containing polysorbate 80 have been linked to hypersensitivity reactions, including anaphylaxis and irritation of blood vessels resulting in infusion-site pain.ii,iii,iv

Cinvanti was approved based on data demonstrating the bioequivalence of Cinvanti to Emend IV® (fosaprepitant), supporting its efficacy for the prevention of acute and delayed CINV following HEC and MEC.

Results from 2 pivotal randomized, cross-over bioequivalence studies of Cinvanti and Emend IV showed subjects receiving Cinvanti reported fewer adverse events than those receiving Emend IV, including substantially fewer infusion-site reactions.v

“CINV remains a high unmet medical need in the oncology community, and 5 full days of CINV coverage continues to be our goal. NK1 receptor antagonists are recommended for routine use with HEC and are a recommended option with MEC. Despite this, NK1 receptor antagonists are underutilized in CINV. This provides a large opportunity for Cinvanti to help more patients avoid CINV and adhere to their chemotherapy regimens,” said Jeffrey F. Patton, M.D., Chief Executive Officer of Tennessee Oncology.

“Aprepitant has long been the standard in the NK1 class and it remains the only single-agent NK1 with proven efficacy in preventing CINV in both the acute and delayed phases in HEC and MEC. Because Cinvanti is a novel, polysorbate 80-free IV formulation of aprepitant, it enables physicians to provide patients with standard-of-care efficacy without the potential risk of polysorbate 80-related adverse events, such as infusion-site reactions,” said Rudolph M. Navari, M.D., Ph.D., University of Alabama, Birmingham School of Medicine, Director, Cancer Care Program, Division of Hematology Oncology.

“Since both Cinvanti and SUSTOL have been shown to significantly reduce CINV in both the acute and delayed phase, by complementary mechanisms, they are an excellent strategic and operational fit for the Heron commercial team. The commercial team is ready to launch Cinvanti in January of next year,” said Barry D. Quart, Pharm.D., Chief Executive Officer of Heron. “To obtain FDA approval for a second product in just over a year is a significant achievement for Heron, and we remain on-track with our third important product, HTX-011, which we expect to file for FDA review in 2018.”

About Cinvanti (aprepitant) injectable emulsion

Cinvanti is an intravenous formulation of aprepitant, an NK1 receptor antagonist for the prevention of CINV. Cinvanti is used in combination with a 5-HT3 receptor antagonist and dexamethasone. Heron developed Cinvanti, a proprietary novel lipid emulsion formulation of aprepitant, to overcome the low water solubility of aprepitant without polysorbate 80 or other synthetic surfactants, with the goal to reduce the risk for infusion-site reactions and hypersensitivity reactions that are reported with Emend IV.

Important Safety Information for Cinvanti

Cinvanti is contraindicated in patients with hypersensitivity to any of the components of Cinvanti. Serious hypersensitivity reactions, including anaphylaxis and anaphylactic shock, have been reported with fosaprepitant, a prodrug of aprepitant, and with oral aprepitant. Symptoms including flushing, erythema, dyspnea, hypotension and syncope have been reported. If symptoms occur, discontinue Cinvanti. Do not reinstate if symptoms occur with first-time use.

Use of pimozide with Cinvanti is contraindicated due to the risk of significantly increased plasma concentrations of pimozide, potentially resulting in prolongation of the QT interval, a known adverse reaction of pimozide.

Use of Cinvanti may result in clinically significant CYP3A4 Drug Interactions. Aprepitant is a substrate, weak-to-moderate (dose-dependent) inhibitor, and an inducer of CYP3A4. Use with other drugs that are CYP3A4 substrates may result in increased plasma concentration of the concomitant drug. Use of Cinvanti with strong or moderate CYP3A4 inhibitors (e.g., ketoconazole, diltiazem) may increase plasma concentrations of aprepitant and result in an increased risk of adverse reactions related to Cinvanti. Use of Cinvanti with strong CYP3A4 inducers (e.g., rifampin) may result in a reduction in aprepitant plasma concentrations and decreased efficacy of aprepitant.

Co-administration of Cinvanti with warfarin, a CYP2C9 substrate, may result in a clinically significant decrease in the International Normalized Ratio (INR) of prothrombin time. Monitor the INR in patients on chronic warfarin therapy in the 2-week period, particularly at 7 to 10 days, following initiation of Cinvanti with each chemotherapy cycle.
The efficacy of hormonal contraceptives may be reduced during administration of and for 28 days following the last dose of Cinvanti. Advise patients to use effective alternative or back-up methods of non-hormonal contraception during treatment with Cinvanti and for 1 month following administration of Cinvanti or oral aprepitant, whichever is administered last.

Avoid use of Cinvanti in pregnant women as alcohol is an inactive ingredient for Cinvanti. There is no safe level of alcohol exposure in pregnancy.

No dosage adjustment is necessary for patients with mild to moderate hepatic impairment (Child-Pugh score 5 to 9). There are no clinical or pharmacokinetic data in patients with severe hepatic impairment (Child-Pugh score greater than 9). Additional monitoring for adverse reactions in these patients may be warranted when Cinvanti is administered.

In general, use caution when dosing elderly patients as they have a greater frequency of decreased hepatic, renal or cardiac function and concomitant disease or other drug therapy.

The most common adverse reactions with the 3-day oral aprepitant regimen in conjunction with MEC (≥1% and greater than standard therapy) were fatigue and eructation.
The most common adverse reactions with the single-dose intravenous fosaprepitant regimen in conjunction with HEC were generally similar to that seen in prior HEC studies with oral aprepitant. In addition, infusion site reactions (3%) occurred.

The most common adverse reactions with a single-dose of Cinvanti (≥2%) were headache and fatigue.

About Chemotherapy-Induced Nausea and Vomiting (CINV)

While chemotherapy is one of the most effective and commonly used therapies to help patients fight cancer, it is accompanied by debilitating side effects, including varying degrees of nausea and vomiting, often attributed as a leading cause of premature discontinuation of cancer treatment. The goal of antiemetic therapy is to prevent CINV in both the acute phase (0 – 24 hours after chemotherapy) and delayed phase (24 – 120 hours after chemotherapy). The National Comprehensive Cancer Network (NCCN) and the American Society of Clinical Oncology (ASCO) have categorized chemotherapy regimens based on the degree to which they cause nausea and vomiting: low emetogenic chemotherapy (LEC); moderately emetogenic chemotherapy (MEC); and highly emetogenic chemotherapy (HEC).

About Heron Therapeutics, Inc.

Heron Therapeutics, Inc. is a commercial-stage biotechnology company focused on improving the lives of patients by developing best-in-class treatments that address some of the most important unmet patient needs. Heron is developing novel, patient-focused solutions that apply its innovative science and technologies to already-approved pharmacological agents for patients suffering from cancer or pain. 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, including, but not limited to, those associated with: the timing of the commercial launch of Cinvanti; postmarketing safety information for SUSTOL and Cinvanti; the potential market opportunity for Cinvanti; whether the HTX-011 Phase 2 study results are indicative of the results in future studies; the timing of completion and results of the Phase 3 studies for HTX-011; the timing of the NDA filing for HTX-011; 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.

i Emend [aprepitant] capsules [US package insert] (Rev. May 2017).
ii Emend [fosaprepitant dimeglumine] for injection [US package insert] (Rev. August 2017).
iii Joerger, M. (2012). “Prevention and handling of acute allergic and infusion reactions in oncology.” Ann Oncol 23 Suppl 10: x313-319.
iv Leal, A. D., K. C. Kadakia, S. Looker, C. Hilger, K. Sorgatz, K. Anderson, A. Jacobson, D. Grendahl, D. Seisler, T. Hobday and C. L. Loprinzi (2014). “Fosaprepitant-induced phlebitis: a focus on patients receiving doxorubicin/cyclophosphamide therapy.” Support Care Cancer 22(5): 1313-1317.
v Ottoboni, T., G. Boccia, M.R. Keller, M. Cravets, N. Clendeninn, B. Quart. “Bioequivalence of HTX-019 (aprepitant IV) and fosaprepitant in healthy subjects.” Presented at Hematology/Oncology Pharmacy Association Annual Conference, March 29-April 1, 2017, Anaheim, CA.

Source: Heron Therapeutics, Inc.

Posted: November 2017

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