News Release
                    
                Mallinckrodt Pharmaceuticals Presented 15 Posters on Investigational Drug at PAINWeek 2013
                    LAS VEGAS--(BUSINESS WIRE)--Sep. 6, 2013--
      Mallinckrodt
      (NYSE: MNK) presented 15 posters with data on its investigational drug,
      MNK-795, studied for the management of moderate to severe acute pain
      where the use of an opioid analgesic is appropriate, at PAINWeek, which
      runs from Sept. 4-7 in Las Vegas. The studies span the compound’s
      efficacy, safety, abuse-related characteristics, and release/delivery
      profile with immediate and extended-release components.
    
      For more information about Mallinckrodt’s presence at PAINWeek, contact
      Mallinckrodt Medical Information at 1.800.788.7898 or by email.
    
      “As a leader in pain management, Mallinckrodt has taken a comprehensive
      approach to driving research in the acute pain category,” said Tom
      Smith, M.D., Chief Medical Officer at Mallinckrodt. “We believe that the
      data presented this week show our commitment to this disease area.”
    
      In addition, Mallinckrodt hosted a booth focused on the responsible
      delivery of opioid medications, a C.A.R.E.S. AllianceSM
      booth, and a sponsored symposium titled “Regulatory Changes and Abuse
      Deterrence: Impact on Products and Practices.” Mallinckrodt is dedicated
      to providing medications for treatment of patients with pain, and is
      equally committed to working with policy makers, law enforcement, and
      industry to address the complex issues of abuse and diversion.
    
      If you would like more information about PAINWeek, please click here.
    
      ABOUT MALLINCKRODT:
    
      Mallinckrodt is a leading global specialty pharmaceuticals business that
      develops, manufactures, markets, and distributes specialty
      pharmaceutical products and medical imaging agents. The Company’s
      Specialty Pharmaceuticals segment includes branded and generic drugs,
      and the Global Medical Imaging segment includes contrast media and
      nuclear imaging agents. Mallinckrodt has approximately 5,500 employees
      worldwide with direct sales in roughly 50 countries and distribution in
      approximately 40 other countries. The Company’s 2012 revenue totaled
      $2.1 billion. To learn more about Mallinckrodt, visit www.mallinckrodt.com.
    
      FORWARD-LOOKING STATEMENTS
    
      Any statements contained in this communication that do not describe
      historical facts may constitute forward-looking statements as that term
      is defined in the Private Securities Litigation Reform Act of 1995. Such
      forward-looking statements include, but are not limited to, statements
      about future financial condition and operating results, economic,
      business, competitive and/or regulatory factors affecting our business.
      Any forward-looking statements contained herein are based on our
      management's current beliefs and expectations, but are subject to a
      number of risks, uncertainties and changes in circumstances, which may
      cause actual results or Company actions to differ materially from what
      is expressed or implied by these statements. The factors that could
      cause actual future results to differ materially from current
      expectations include, but are not limited to, our ability to receive
      procurement and production quotas granted by the U.S. Drug Enforcement
      Administration, our ability to obtain and/or timely transport
      molybdenum-99 to our technetium-99m generator production facilities,
      customer concentration, cost-containment efforts of customers,
      purchasing groups, third-party payors and governmental organizations,
      our ability to successfully develop or commercialize new products, our
      ability to protect intellectual property rights, competition, our
      ability to integrate acquisitions of technology, products and
      businesses, product liability losses and other litigation liability, the
      reimbursement practices of a small number of large public or private
      issuers, complex reporting and payment obligation under healthcare
      rebate programs, changes in laws and regulations, conducting business
      internationally, foreign exchange rates, material health, safety and
      environmental liabilities, litigation and violations and information
      technology infrastructure. These and other factors are identified and
      described in more detail in the “Risk Factors” section of the Form 10
      Registration Statement, as amended. We disclaim any obligation to update
      these forward-looking statements other than as required by law.
    

Source: Mallinckrodt
      Mallinckrodt
Lynn Phillips, 314-654-3263
Manager, Media
      Relations
lynn.phillips@mallinckrodt.com
or
Meredith
      Fischer, 314-654-6595
Senior Vice President, Communications
meredith.fischer@mallinckrodt.com
or
John
      Moten, 314-654-6650
Vice President, Investor Relations
john.moten@mallinckrodt.com