Milestone Pharmaceuticals USA, Inc. · NDA 218571

¢ IN U.S. FOOD & DRUG ADMINISTRATION Net NDA 218571 COMPLETE RESPONSE Milestone Pharmaceuticals USA, Inc. Attention: Joseph Oliveto CEO 6210 Ardrey Kell Rd., Suite 650 Charlotte, NC 28277 Dear Joseph Oliveto: Please refer to your new drug application for etripamil nasal spray. We also acknowledge receipt of your amendments dated ass. which were not reviewed for this action. You may incorporate applicable sections of the amendments by specific reference as part of your response to the deficiencies cited in this letter. We have completed our review of this application, as amended, and have determined that we cannot approve this application in its present form. We have described our reasons for this action below and, where possible, our recommendations to address these issues. PRODUCT QUALITY Reference ID: 5559672 NDA 218571 Page 2 PRESCRIBING INFORMATION We acknowledge receipt of your draft labeling received via email on onion . We reserve further comment on the proposed labeling until the application is otherwise adequate. We encourage you to review the labeling review resources on the Prescription Drug Labeling Resources? and Pregnancy and Lactation Labeling Final Rule? websites, including regulations and related guidance documents and the Selected Requirements for Prescribing Information (SRPI) - a checklist of important format items from labeling regulations and guidances. If you revise labeling, use the SRPI checklist to ensure that the Prescribing Information conforms with format items in regulations and guidances. Your response must include 2 3 U.S. Food and Drug Administration Silver Spring, MD 20993 www.fda.gov Reference ID: 5559672 NDA 218571 Page 3 updated content of labeling [21 CFR 314.50(I)(1)(i)] in structured product labeling (SPL) format as described at FDA.gov.* CARTON AND CONTAINER LABELING We reserve comment on the proposed labeling until the application is otherwise adequate. FACILITY INSPECTIONS We have not completed a preapproval inspection of your om manufacturing facility, which you identified asa testing facility in the amendment to the NDA submitted on ow » An inspection of the ow is required before this application can be approved, as the FDA must assess the ability of that facility to conduct the listed manufacturing operations in compliance with Current Good Manufacturing Practices (CGMPs). PROPRIETARY NAME Please refer to correspondence dated, oe , which addresses the proposed proprietary name, oe This name was found conditionally acceptable pending approval of the application in the current review cycle. Please resubmit the proposed proprietary name when you respond to all of the application deficiencies that have been identified in this letter. SAFETY UPDATE When you respond to the above deficiencies, include a safety update as described at 21 CFR 314.50(d)(5)(vi)(b). The safety update should include data from all nonclinical and clinical studies/trials of the drug under consideration regardless of indication, dosage form, or dose level. (1) Describe in detail any significant changes or findings in the safety profile. (2) When assembling the sections describing discontinuations due to adverse events, serious adverse events, and common adverse events, incorporate new safety data as follows: e Present new safety data from the studies/clinical trials for the proposed indication using the same format as in the original submission. 4 http://www. fda.gov/Forlndustry/DataStandards/StructuredProductLabeling/default.htm U.S. Food and Drug Administration Silver Spring, MD 20993 www.fda.gov Reference ID: 5559672 NDA 218571 Page 4 e Present tabulations of the new safety data combined with the original application data. e Include tables that compare frequencies of adverse events in the original application with the retabulated frequencies described in the bullet above. e For indications other than the proposed indication, provide separate tables for the frequencies of adverse events occurring in Clinical trials. (3) Present a retabulation of the reasons for premature trial discontinuation by incorporating the drop-outs from the newly completed trials. Describe any new trends or patterns identified. (4) Provide case report forms and narrative summaries for each subject who died during a Clinical trial or who did not complete a trial because of an adverse event. In addition, provide narrative summaries for serious adverse events. (5) Describe any information that suggests a substantial change in the incidence of common, but less serious, adverse events between the new data and the original application data. (6) Provide updated exposure information for the clinical studies/trials (e.g., number of subjects, person time). (7) Provide a summary of worldwide experience on the safety of this drug. Include an updated estimate of use for drug marketed in other countries. (8) Provide English translations of current approved foreign labeling not previously submitted. OTHER Within one year after the date of this letter, you are required to resubmit or take other actions available under 21 CFR 314.110. If you do not take one of these actions, we may consider your lack of response a request to withdraw the application under 21 CFR 314.65. You may also request an extension of time in which to resubmit the application. A resubmission must fully address all the deficiencies listed in this letter and should be clearly marked with "RESUBMISSION" in large font, bolded type at the beginning of the cover letter of the submission. The cover letter should clearly state that you consider this resubmission a complete response to the deficiencies outlined in this letter. A partial response to this letter will not be processed as a resubmission and will not start a new review cycle. U.S. Food and Drug Administration Silver Spring, MD 20993 www.fda.gov Reference ID: 5559672 NDA 218571 Page 5 You may request a meeting or teleconference with us to discuss what steps you need to take before the application may be approved. If you wish to have such a meeting, submit your meeting request as described in the draft guidance for industry Formal Meetings Between the FDA and Sponsors or Applicants of PDUFA Products. The product may not be legally marketed until you have been notified in writing that this application is approved. If you have any questions, please call oe Sincerely, {See appended electronic signature page} (b) (4) Center for Drug Evaluation and Research U.S. Food and Drug Administration Silver Spring, MD 20993 www.fda.gov Reference ID: 5559672 Signature Page 1 of 1 This is a representation of an electronic record that was signed electronically. Following this are manifestations of any and all electronic signatures for this electronic record. (b) (4) 03/27/2025 02:58:11 PM Reference ID: 5559672