New Data Show Patients Are Highly Satisfied With and Confident in the Efficacy of Daily Treatment With PALFORZIA™ After Nine Months

— Patients Report Treatment with PALFORZIA™ Is Convenient and Easy to Integrate into Daily Lives —

BRISBANE, Calif.–(BUSINESS WIRE)–Aimmune Therapeutics, Inc. (Nasdaq: AIMT), a biopharmaceutical company developing and commercializing treatments for potentially life-threatening food allergies, today announced new findings from the phase 3 ARTEMIS trial that show patients with peanut allergy aged 4 through 17 were highly satisfied after nine months of daily treatment with PALFORZIA™ [Peanut (Arachis hypogaea) Allergen Powder-dnfp], the first therapy approved by the U.S. Food and Drug Administration (FDA) for peanut allergy. Specifically, the report revealed that patients were confident that the treatment was effective, convenient to incorporate into their daily lives, and easy to administer.

These data were presented during the digital European Academy of Allergy and Clinical Immunology (EAACI) Congress and are available for on-demand viewing at EAACI scientific programme website.

“We are encouraged to see the majority of participants completing the nine-month ARTEMIS trial reported high global satisfaction with daily treatment with PALFORZIA, high confidence in the treatment, and moderate-to-high satisfaction with the convenience of the treatment,” said Daniel Adelman, M.D., Chief Medical Officer of Aimmune. “Hearing from patients directly is important for us to better understand the effects this treatment can have on their lives. The study participants felt treatment with PALFORZIA in the ARTEMIS trial was effective, which may help them better manage their peanut allergy and live their lives more confidently. Our hope is that these data will reassure families who may be considering treatment with PALFORZIA to help them make important shared treatment decisions with their allergists.”

Patient-reported treatment satisfaction was evaluated after nine months of daily treatment with PALFORZIA in a clinical trial setting using the Treatment Satisfaction Questionnaire for Medication (TSQM-9), a validated instrument used in a variety of disease states. Participants reported high mean total scale scores for effectiveness and satisfaction and moderate scores for convenience, indicating that patients were overall satisfied with this treatment and the daily dosing approach.

PALFORZIA was approved by the U.S. Food and Drug Administration (FDA) in January 2020 as an oral immunotherapy for the mitigation of allergic reactions, including anaphylaxis, that may occur with accidental exposure to peanut in patients aged 4 through 17 years with a confirmed diagnosis of peanut allergy. In Europe, Aimmune’s marketing authorization application for AR101 is under review with the European Medicines Agency (EMA). A Swiss Agency for Therapeutic Products (SwissMedic) review of AR101 also is ongoing.

About the ARTEMIS Self-Reported Treatment Satisfaction Findings

The ARTEMIS study is a Phase 3, randomised, double-blind, placebo-controlled trial evaluating PALFORZIA in peanut-allergic individuals aged 4–17 years in Europe. In the study, patients received daily doses of PALFORZIA or placebo that were escalated every two weeks over approximately six months until a maintenance dose of 300 mg/day was reached, and underwent an exit food challenge after approximately three months of therapeutic maintenance dosing; patient-reported treatment satisfaction was included as an exploratory endpoint. 111 PALFORZIA-treated patients completed a Treatment Satisfaction Questionnaire for Medication (TSQM-9), a validated questionnaire designed to assess patient-reported treatment satisfaction with a medication that consists of nine questions across three domains – global satisfaction, convenience, and effectiveness. Baseline characteristics were well-balanced between the PALFORZIA- and placebo-treated groups and typical of a highly atopic peanut-allergic population.

INDICATION

PALFORZIA is an oral immunotherapy indicated for the mitigation of allergic reactions, including anaphylaxis, that may occur with accidental exposure to peanut. PALFORZIA is approved for use in patients with a confirmed diagnosis of peanut allergy. Initial Dose Escalation may be administered to patients aged 4 through 17 years. Up-Dosing and Maintenance may be continued in patients 4 years of age and older.

PALFORZIA is to be used in conjunction with a peanut-avoidant diet.

Limitations of Use: Not indicated for the emergency treatment of allergic reactions, including anaphylaxis.

IMPORTANT SAFETY INFORMATION

Boxed WARNING:

PALFORZIA can cause anaphylaxis, which may be life threatening and can occur at any time during PALFORZIA therapy.

Prescribe injectable epinephrine, instruct and train patients on its appropriate use, and instruct patients to seek immediate medical care upon its use.

Do not administer PALFORZIA to patients with uncontrolled asthma.

Dose modifications may be necessary following an anaphylactic reaction.

Observe patients during and after administration of the Initial Dose Escalation and the first dose of each Up-Dosing level, for at least 60 minutes.

PALFORZIA is available only through a restricted program called the PALFORZIA REMS.

CONTRAINDICATIONS

PALFORZIA is contraindicated in patients with uncontrolled asthma, or with a history of eosinophilic esophagitis and other eosinophilic gastrointestinal disease.

WARNINGS AND PRECAUTIONS

Anaphylaxis

PALFORZIA can cause anaphylaxis, which may be life threatening. PALFORZIA is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the PALFORZIA REMS because of the risk of anaphylaxis. Only prescribers, healthcare settings, pharmacies, and patients certified and enrolled in the REMS Program can prescribe, receive, dispense or administer PALFORZIA.

Anaphylaxis has been reported during all phases of PALFORZIA dosing, including Maintenance and in subjects who have undergone recommended Up-Dosing and dose modification procedures.

Do not initiate PALFORZIA treatment in a patient who has had severe or life-threatening anaphylaxis within the previous 60 days. PALFORZIA may not be suitable for patients with certain medical conditions that may reduce the ability to survive anaphylaxis, including but not limited to markedly compromised lung function, severe mast cell disorder, or cardiovascular disease. In addition, PALFORZIA may not be suitable for patients taking medications that can inhibit or potentiate the effects of epinephrine.

All Initial Dose Escalation doses and the first dose of each Up-Dosing level must be administered in a certified health care setting.

Patients may be more likely to experience allergic reactions following PALFORZIA administration in the presence of cofactors such as exercise, hot water exposure, intercurrent illness (e.g., viral infection), or fasting. Other potential cofactors may include menstruation, sleep deprivation, nonsteroidal anti-inflammatory drug use, or uncontrolled asthma. Patients should be proactively counseled about the potential for the increased risk of anaphylaxis in the presence of these cofactors. If possible, adjust the time of dosing to avoid these cofactors. If it is not possible to avoid these cofactors, consider withholding PALFORZIA temporarily.

Asthma

Uncontrolled asthma is a risk factor for a serious outcome, including death, in anaphylaxis. Ensure patients with asthma have their asthma under control prior to initiation of PALFORZIA.

PALFORZIA should be temporarily withheld if the patient is experiencing an acute asthma exacerbation. Following resolution of the exacerbation, resumption of PALFORZIA should be undertaken cautiously. Re-evaluate patients who have recurrent asthma exacerbations and consider discontinuation of PALFORZIA.

Eosinophilic Gastrointestinal Disease

Discontinue PALFORZIA and consider a diagnosis of eosinophilic esophagitis in patients who experience severe or persistent gastrointestinal symptoms, including dysphagia, vomiting, nausea, gastroesophageal reflux, chest pain, or abdominal pain.

Gastrointestinal Adverse Reactions

Gastrointestinal adverse reactions were commonly reported in PALFORZIA-treated subjects, and dose modification should be considered for patients who report these reactions. For severe or persistent gastrointestinal symptoms consider a diagnosis of eosinophilic esophagitis.

ADVERSE REACTIONS

The most common adverse events reported in subjects treated with PALFORZIA (incidence ≥ 5% and ≥ 5% than placebo) are abdominal pain, vomiting, nausea, oral pruritus, oral paresthesia, throat irritation, cough, rhinorrhea, sneezing, throat tightness, wheezing, dyspnea, pruritus, urticaria, anaphylactic reaction, and ear pruritus.

Please see full Prescribing Information, including Boxed WARNING, and Medication Guide at www.PALFORZIA.com.

For more information about PALFORZIA, please call 1-844-PALFORZ (1-844-725-3679) or visit www.PALFORZIA.com.

About Aimmune

Aimmune Therapeutics, Inc. is a biopharmaceutical company developing and commercializing treatments for potentially life-threatening food allergies. With a mission to improve the lives of people with food allergies, Aimmune is developing and commercializing oral treatments for potentially life-threatening food allergies. The Company’s Characterized Oral Desensitization ImmunoTherapy (CODIT™) approach is intended to provide meaningful levels of protection against allergic reactions resulting from accidental exposure to food allergens by desensitizing patients with defined, precise amounts of key allergens. Aimmune has one FDA-approved medicine for peanut allergy and other investigational therapies in development to treat other food allergies. For more information, please visit www.aimmune.com.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Such statements include, but are not limited to, statements regarding: Aimmune’s expectations regarding potential applications of the CODIT approach to treating life-threatening food allergies. Risks and uncertainties that contribute to the uncertain nature of the forward-looking statements include: the risk that the COVID-19 worldwide pandemic may continue to negatively impact the business, research and clinical operations of Aimmune or its partners; Aimmune’s or any of its collaborative partners’ ability to initiate and/or complete clinical trials; the unpredictability of the regulatory process; the possibility that Aimmune’s or any of its collaborative partners’ clinical trials will not be successful; Aimmune’s dependence on the success of PALFORZIA; Aimmune’s reliance on third parties for the manufacture of Aimmune’s products and product candidates; possible regulatory developments in the United States and foreign countries; and Aimmune’s ability to attract and retain senior management personnel. These and other risks and uncertainties are described more fully in Aimmune’s most recent filings with the Securities and Exchange Commission, including its Quarterly Report on Form 10-Q for the quarter ended March 31, 2020. All forward-looking statements contained in this press release speak only as of the date on which they were made. Aimmune undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.

This press release concerns PALFORZIA, which has been approved for marketing by the FDA in the United States and has not been approved for marketing by the EMA or Swissmedic. PALFORZIA in Europe is currently limited to investigational use, and no representation is made as to its safety or effectiveness for the purposes for which it is being investigated.

PALFORZIA™, AIMMUNE^®, AIMMUNE THERAPEUTICS^® and CODIT™ are trademarks of Aimmune Therapeutics, Inc.

Contacts

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Media:
Julie Normart

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Lauren Barbiero

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