MNK Response to CNN 6.22.18 Any of the following sections may be attributed to Mallinckrodt or "a spokesperson for the company." Summary response: H.P. Acthar Gel makes a significant difference in the lives of very sick patients with unmet medical needs. We are proud of the drug and the important investment we are making in it. Currently approved in the U.S. for 19 indications, HP. Acthar Gel is largely used as a later line treatment, prescribed by skilled healthcare providers to a small subset of appropriate patients who need an alternative treatment option. For infantile spasms patients, H.P. Acthar Gel is FDA-approved as a monotherapy treatment. Mallinckrodt has invested substantially in H.P. Acthar Gel since acquiring it in 2014, generating further data supporting its use, and has made only modest price adjustments. The company has acted and continues to act responsibly and ethically in its dealings with healthcare practitioners and others. Physician Payments/Travel Expense Reimbursement: In the period of 2013-2016, of all healthcare practitioners prescribing H.P. Acthar Gel to whom Mallinckrodt or the prior owner made payments, more than 95% received only modest meals or nominally priced clinical reprints - well within regulations and guidelines. For the remaining ~5%, the vast majority were engaged for peer-to-peer speaking engagements, with a small fraction involved in other consulting services for the company, such as speaking to employees or investors and participation in expert Physician Advisory Boards - again, all within regulations and guidelines. It is our belief that many physicians prefer peer-to-peer presentations and dialogue over other methods of learning about the value a product may bring to appropriate patients they are treating. The physicians who present to their peers must take time away from their practice and frequently travel to other cities - incurring normal, but sometimes substantial travel expenses. Any payments reported include reimbursement for these expenses. Mallinckrodt designs our policies to be consistent with applicable legal and regulatory requirements, the PhRMA Code, and industry best practices. We have instituted controls and 1 MNK Response to CNN 6.22.18 strict guidelines regarding the selection and training of speakers; the conduct of such programs, including requirements related to the individuals that may attend such programs; and guidelines to ensure that the venues selected for such programs are appropriate and conducive to the educational focus of these programs, and payments are based on fair market value. H.P. Acthar Gel is FDA-Approved for 19 Indications: While H.P. Acthar Gel has been used to treat patients for more than 50 years, the U.S. Food and Drug Administration (FDA) reviewed its label most recently in 2010, at which time the FDA determined there was existing, sufficient scientific and clinical evidence to support its use in the 19 various indications contained in the current H.P. Acthar Gel label. One of these indications is for use of H.P. Acthar Gel in the treatment of Infantile Spasms (IS),1 for which it is considered the gold standard for treatment. Two randomized clinical trials were submitted in support of FDA approval of the drug and its effectiveness as a treatment for IS, one of which compared H.P. Acthar Gel to prednisone. In that trial 86.7% of patients had a positive response to H.P. Acthar Gel vs. 28.6% that responded to prednisone. Patients who responded in the pivotal study treated with a two-week course of H.P. Acthar Gel therapy experienced complete suppression of the two key measures of disease – spasms and hypsarrhythmia. The IS clinical trial results appear in Section 14 of the full prescribing information for the drug. Aside from treatment of IS, H.P. Acthar Gel is often prescribed by doctors predominantly as a later-line treatment to a small subset of patients suffering from various devastating diseases for whom other approved FDA treatment options have failed. Significant Clinical Evidence Supports the Efficacy of H.P. Acthar Gel: There is significant clinical evidence to support the effectiveness of H.P. Acthar Gel. This evidence is the result of company-sponsored controlled clinical trials, investigator-initiated research conducted in top hospitals and medical centers by some of the country's preeminent physicians, and health economic and outcomes research data. Equally important, there are decades of clinical experience that doctors have with the product as a proven therapy for appropriate patients. The JAMA letter you referenced is merely “a letter” to the editor submitted by a physician who, for years, has been critical of the drug. H.P. Acthar Gel is an FDA-approved therapy for acute exacerbations of MS (or MS relapses) in adults. Steroids are commonly used as a first line treatment of MS relapse; however, North American Research Committee on Multiple Sclerosis (NARCOMS) data indicates 30% of MS relapse patients had no response to steroids.2 1 Because symptoms of IS can be subtle and are generally not widely recognized, Mallinckrodt invests resources to support education of the medical and patient community to ensure IS babies are getting diagnosed promptly. We also invest in ongoing clinical research to further understand the disease and since treating infantile spasms is so urgent once diagnosed Mallinckrodt has established an entire support team to usher each baby’s prescription through the coverage process to ensure quick access to the product. 2 Nickerson, M., et al., Impact of multiple sclerosis relapse: The NARCOMS participant perspective. Multiple sclerosis and related disorders, 2015. 4(3): p. 234-240. 2 MNK Response to CNN 6.22.18 Additionally, some patients cannot tolerate steroids. Nearly 20% of patients consider avoiding relapse therapy due to steroid adverse events (AEs).3 Both the American Academy of Neurology and the National Multiple Sclerosis Society have said that alternative treatment options are needed for patients with MS relapse who cannot tolerate steroids, do not respond to steroids or do not want to take steroids.4 5 Accordingly, H.P. Acthar Gel may provide an option for patients who need an alternative treatment option. Mallinckrodt has a company-sponsored clinical trial underway to further assess the efficacy and safety of H.P. Acthar Gel in patients with MS relapse, and is conducting an observational registry to evaluate the use of the drug for treatment of MS relapse. You can access a recent interim report on those findings here. Similarly, as part of the company’s significant investment into H.P. Acthar Gel, a number of other clinical studies are ongoing, including one in rheumatoid arthritis patients. We recently provided an interim report on those findings as well which can be found here. The Price of H.P. Acthar Gel: In 2007, H.P. Acthar Gel’s previous owner was near bankruptcy and raised the price of the drug substantially in order to keep the drug on the market and to ensure the long-term supply of the drug for treatment of children afflicted with infantile spasms and other small groups of patients suffering from complex, devastating diseases. They did this only after extensive consultation with the FDA.6 Today the price per vial of H.P. Acthar Gel is $38,892. Since acquiring H.P. Acthar Gel, Mallinckrodt has only made modest price adjustments in the mid-single digit percentage range. Additionally, Mallinckrodt provides discounts to this list price to payers, which the prior owner generally did not offer. We would encourage you to review Mallinckrodt's pledge on drug pricing and innovation, which we take very seriously. Mallinckrodt’s Investment in H.P. Acthar Gel: In contrast to the drug’s prior owner, since acquiring H.P. Acthar Gel in 2014 Mallinckrodt has invested nearly $400 million into the drug. Specifically: building on substantial clinical experience as well as previously completed and largely independent clinical case series and smaller trials; modernizing manufacturing; expanding medical affairs and research activities; 3 Jongen, P.J., et al., Patient-reported adverse effects of high-dose intravenous methylprednisolone treatment: a prospective web-based multi-center study in multiple sclerosis patients with a relapse. Journal of Neurology, 2016: p. 1-11. 4 Society, N.M.S. Managing Relapses Understand the definition and cause of MS relapses (exacerbations) and learn about medications and rehabilitation strategies to manage them.; Available from: http://www.nationalmssociety.org/Treating-MS/Managing-Relapses. 5 Cortese, I., et al., Evidence-based guideline update: Plasmapheresis in neurologic disorders Report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Neurology, 2011. 76(3): p. 294-300. Please see the Questcor’s 10-K filing for 2007. Additionally, Questcor issued many new shares the year before, presumably to raise capital. Moreover, articles have appeared, including one in Investor’s Business Daily in November of 2013 in which the former CEO of Questcor publicly discussed the company’s challenges to stay afloat during this time period. 6 3 MNK Response to CNN 6.22.18 and initiating six well-designed, company-sponsored randomized, controlled clinical studies, targeting combined enrollment of nearly 1,100 patients.7 Adverse Events: As an FDA-approved drug, H.P. Acthar Gel is deemed safe and effective for its labeled indications by the agency. Mallinckrodt annually provides the FDA with data about adverse events related to its marketed products. As we approach our yearly filing, we are pleased to report that the positive benefit-risk of H.P. Acthar Gel has remained unchanged across all marketed indications and is consistent with previous years. To derive meaningful conclusions of this topic, adverse event reports for H.P. Acthar Gel need to be considered within the appropriate context. H.P. Acthar Gel is typically prescribed to patients with very serious medical conditions, often as a third or fourth line of treatment when other treatments have failed. It is well known that many of these patients suffer from diseases in which co-morbidities are high, and often they are on other medications that may be contributing factors. The frequency of adverse event reports also does not necessarily correlate to an increase in the actual prevalence or relative severity of any particular side effect or event. Each event is reported and counted whether it relates to a relatively minor event such as a headache or a more serious event such as anaphylaxis. Furthermore, the FDA itself cautions on its website that reporting of a side effect or adverse event occurring while taking a drug doesn’t establish a causal relationship between the adverse event and the medicine. Over the past years, the number of patients using H.P. Acthar Gel has increased significantly. Critically, however, company-generated H.P. Acthar Gel data on adverse events over the last four calendar years indicates that the number of serious adverse events as a proportion of the number of H.P. Acthar Gel prescriptions (measured by vials sold) has remained very low and consistent with the FDA’s independent analysis. H.P. Acthar Gel Advisory Committee Results Regarding your questions on this topic, these are the facts: On May 11, 2010, a meeting of the FDA’s Peripheral and Central Nervous System Drugs Division held an Advisory Committee Meeting (AdCom) to review/discuss the data Questcor was submitting/had submitted in support of use of H.P. Acthar Gel in treatment of patients with Infantile Spasms. The Committee voted 22 to 1 that H.P. Acthar Gel was an effective treatment for patients with IS and voted 20 to 1 the drug was safe in the intended patient population at an effective dosing regimen, inclusive of a 7 The six ongoing clinical trials are referenced below. Each link takes you to the announcement of the first patient enrolled in the clinical trial. Within each press release, in the “About the Trial” section, you will see a link to further details about the study that can be found on www.clinicaltrials.gov. These important investments will build upon the existing body of clinical evidence to support the effectiveness of H.P. Acthar Gel. • Phase 2B trial in Amyotrophic Lateral Sclerosis • Phase 4 trial in Pulmonary Sarcoidosis • Phase 4 trial in Multiple Sclerosis Relapse • Phase 4 trial in Lupus • Phase 4 trial in Rheumatoid Arthritis • Phase 4 trial in Focal Segmental Glomerulosclerosis (Nephrotic Syndrome) Studies conducted prior to Mallinckrodt’s acquisition of Acthar, as well as more recently completed research activities, are listed in the bibliography section of Mallinckrodt’s website. 4 MNK Response to CNN 6.22.18 Risk Evaluation and Mitigation Strategy (REMS). The REMS was a part of the agency’s eventual approval of the drug for this indication (along with the reaffirmation of 18 others) in 2010. Two years later, the FDA removed the REMS requirement based on H.P. Acthar Gel’s demonstrated safety in the market in IS patients. Synacthen, H.P. Acthar Gel and the FTC Settlement: Synacthen® (tetracosactide) is not a generic competitor to H.P. Acthar Gel. The two products are very different drugs. While the two drugs may share mechanistic effects through the ACTH component, H.P. Acthar Gel is much more. H.P. Acthar Gel is a naturally sourced complex mixture of purified adrenocorticotropic hormone analogs and other pituitary peptides – not a steroid – and amongst its many components includes a 1-39 peptide chain, meaning it includes more than simply ACTH. Synacthen is a synthetic ACTH 24-peptide chain. The company believes the regulatory path for any corticotropin-type new drug application requiring clinical trials and FDA approval and could take many years if successful. Mallinckrodt did not pursue commercialization of Synacthen for IS, as the barriers to completion were, in our view, virtually impossible to overcome. Notably, Synacthen has never been approved by the FDA for use in the U.S. for any indication and it is not an alternative treatment for IS in the U.S. In all the time that Synacthen has been commercially available in select foreign countries, it has never been commercialized in the U.S. and no owner of Synacthen (including the owner prior to Questcor) ever undertook U.S. development of the drug in IS or any other indication. Even in Canada, where Synacthen is approved and used in certain indications, it is not approved for use in IS patients. In Canada, the label contains a warning against use in infants or children under 3 years old due to the product containing benzyl alcohol. Once Mallinckrodt acquired the prior owner of Synacthen, we began developing the drug and in 2016, prior to the U.S. Federal Trade Commission (FTC) settlement. Mallinckrodt is developing the drug (MNK-1411) in an indication where there is both high unmet medical need and, if successful, potential for greatest impact for patients – Duchenne Muscular Dystrophy. The Rockford Lawsuit: Mallinckrodt strongly believes that none of the company actions outlined in the plaintiff’s complaint constitute a violation of any law and, therefore, believes that the complaint should be dismissed in its entirety. We will vigorously defend the company in this matter. Treating physicians prescribe what they believe is best for their patients and the doctor(s) in Rockford, Illinois chose to prescribe H.P. Acthar Gel. Whistleblower Matter: When Ms. Dhaliwal made the allegations outlined in her lawsuit known to Mallinckrodt, the company promptly engaged the services of an outside legal counsel, who conducted a thorough review of her concerns. We believe the company has acted responsibly at all times, strongly disagree with these allegations and intend to vigorously defend this matter. # # 5 #