Mallinckrodt Receives FDA Acceptance of Stannsoporfin New Drug Application Filing

STAINES-UPON-THAMES, United Kingdom, Feb. 23, 2018 /PRNewswire/ -- Mallinckrodt plc (NYSE: MNK), a leading global specialty pharmaceutical company, today announced the U.S. Food and Drug Administration (FDA) has accepted its New Drug Application (NDA)  seeking approval of its recently acquired developmental product stannsoporfin. If approved, the drug is expected to become the first and only pharmacologic option in the U.S. indicated for treatment of neonates at risk for developing severe hyperbilirubinemia, or severe jaundice.

Under the Prescription Drug User Fee Act (PDUFA), the FDA has set its action date to respond to the NDA as August 22, 2018.  The agency previously granted its Fast Track status to stannsoporfin. The Fast Track designation is a process designed to facilitate the development, and expedite the review of drugs to treat serious conditions and fill an unmet medical need¹.

"We are pleased the FDA has accepted our application," said Steve Romano, M.D., Chief Scientific Officer and Executive Vice President of Mallinckrodt. "We look forward to working with the agency in the coming months on the potential approval of stannsoporfin as a new treatment option for thousands of infants at risk for developing severe jaundice who have an unmet medical need."

ABOUT SEVERE HYPERBILIRUBINEMIA AND STANNSOPORFIN
Neonatal jaundice is a common condition in neonates that is associated with the yellowing of the skin and the whites of the eyes, typically in the first few days after birth. In most cases, it does not require treatment; however, elevated bilirubin levels in the blood (hyperbilirubinemia) can be toxic and may potentially lead to neurologic complications, including encephalopathy or irreversible brain damage. Currently, phototherapy is used to help the body clear bilirubin and bring levels down.

Stannsoporfin is a heme oxygenase inhibitor under investigation for its potential to reduce the production of bilirubin in infants at risk for severe neonatal jaundice. The safety and effectiveness of stannsoporfin have not yet been established by the FDA.

ABOUT MALLINCKRODT
Mallinckrodt is a global business that develops, manufactures, markets and distributes specialty pharmaceutical products and therapies. Areas of focus include autoimmune and rare diseases in specialty areas like neurology, rheumatology, nephrology, pulmonology and ophthalmology; immunotherapy and neonatal respiratory critical care therapies; analgesics and gastrointestinal products. The company's core strengths include the acquisition and management of highly regulated raw materials and specialized chemistry, formulation and manufacturing capabilities. The company's Specialty Brands segment includes branded medicines and its Specialty Generics segment includes specialty generic drugs, active pharmaceutical ingredients and external manufacturing. To learn more about Mallinckrodt, visit www.mallinckrodt.com.

Mallinckrodt uses its website as a channel of distribution of important company information, such as press releases, investor presentations and other financial information. It also uses its website to expedite public access to time-critical information regarding the company in advance of or in lieu of distributing a press release or a filing with the U.S. Securities and Exchange Commission (SEC) disclosing the same information. Therefore, investors should look to the Investor Relations page of the website for important and time-critical information. Visitors to the website can also register to receive automatic e-mail and other notifications alerting them when new information is made available on the Investor Relations page of the website.

CAUTIONARY STATEMENTS RELATED TO FORWARD-LOOKING STATEMENTS
This release includes forward-looking statements concerning stannsoporfin including expectations with regard to future regulatory actions and potential impact on patients. The statements are based on assumptions about many important factors, including the following, which could cause actual results to differ materially from those in the forward-looking statements: satisfaction of regulatory and other requirements; actions of regulatory bodies and other governmental authorities; changes in laws and regulations; issues with product quality, manufacturing or supply, or patient safety issues; future commercialization efforts; and other risks identified and described in more detail in the "Risk Factors" section of Mallinckrodt's most recent Annual Report on Form 10-K and other filings with the SEC, all of which are available on its website. The forward-looking statements made herein speak only as of the date hereof and Mallinckrodt does not assume any obligation to update or revise any forward-looking statement, whether as a result of new information, future events and developments or otherwise, except as required by law.

CONTACTS

Media
Rhonda Sciarra 
Senior Communications Manager 
908-238-6765 
rhonda.sciarra@mallinckrodt.com

Meredith Fischer 
Chief Public Affairs Officer 
314-654-3318 
meredith.fischer@mallinckrodt.com

Investor Relations
Coleman N. Lannum, CFA 
Senior Vice President, Investor Strategy and IRO 
314-654-6649 
cole.lannum@mallinckrodt.com

Daniel J. Speciale, CPA 
Director, Investor Relations 
314-654-3638 
daniel.speciale@mallinckrodt.com

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SOURCE Mallinckrodt plc