Mainstay Medical Announces Completion of Pre-Submission Meeting with FDA Regarding Pre-Market Approval (PMA) Application for ReActiv8

PMA submission for ReActiv8 expected this summer

Dublin – Mainstay Medical International plc (“Mainstay” or the “Company”, Euronext Paris: MSTY.PA and Euronext Growth operated by Euronext Dublin (MSTY.IE), a medical device company focused on bringing to market ReActiv8, an implantable restorative neurostimulation system to treat disabling Chronic Low Back Pain, today announces that on 25 June 2019 the Company completed a pre-submission meeting with the U.S. Food and Drug Administration regarding a Pre-Market Approval (PMA) application submission for ReActiv8.

Jason Hannon, CEO of Mainstay, said: “We believe in a rigorous, evidence-based approach to the evaluation of ReActiv8, and we appreciate the opportunity to meet with the FDA on the data we have generated to date relating to the efficacy and safety of this novel therapy. We expect to submit the final module of our PMA application to the FDA relating to ReActiv8 this summer, with a decision on approval expected around the end of 2020.”

Separately, Mainstay also announced that it has entered into an amendment to its agreement with IPF Partners relating to its existing debt facility. Under the amendment, the deadline for Mainstay to qualify to draw down a new tranche of €3.0 million (approximately $3.34 million) in debt was extended from June 30, 2019 to July 31, 2019.

About Mainstay

Mainstay is a medical device company focused on commercializing an innovative implantable restorative neurostimulation system, ReActiv8®, for people with disabling Chronic Low Back Pain (CLBP). The Company is headquartered in Dublin, Ireland. It has subsidiaries operating in Ireland, the United States, Australia, Germany and the Netherlands, and is listed on the regulated market of Euronext Paris (MSTY.PA) and the ESM of Euronext Dublin (MSTY.IE).

About Chronic Low Back Pain

One of the root causes of CLBP is impaired control by the nervous system of the muscles that dynamically stabilize the spine. ReActiv8 is designed to electrically stimulate the nerves responsible for contracting these muscles to improve dynamic spine stability, allowing the body to recover from CLBP.

People with CLBP usually have a greatly reduced quality of life and score significantly higher on scales for pain, disability, depression, anxiety and sleep disorders. Their pain and disability can persist despite the best available medical treatments, and only a small percentage of cases result from an identified pathological condition or anatomical defect that may be correctable with spine surgery. Their ability to work or be productive is seriously affected by the condition and the resulting days lost from work, disability benefits and health resource utilization put a significant burden on individuals, families, communities, industry and governments.

Further information can be found at

CAUTION – in the United States, ReActiv8 is limited by federal law to investigational use only.

PR and IR Enquiries:

LifeSci Advisors, LLC

Brian Ritchie

Tel: + 1 (212) 915-2578


FTI Consulting (for Ireland)

Jonathan Neilan or Patrick Berkery Tel. : +353 1 765 0886


Euronext Advisers:


Fergal Meegan or Barry Murphy

Tel: +353 1 679 6363

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