• In April, the Company presented new data and analyses from multiple studies in the ORION development program for inclisiran at the National Lipid Association 2018 Scientific Sessions. The data demonstrated that inclisiran likely has a "one-size-fits-all" dosing regimen, without the necessity of dose adjustments, across a wide range of dyslipidemia patient populations, including those hard-to-treat patients with homozygous familial hypercholesterolemia (HoFH) and other sub-groups, such as patients with renal impairment and diabetes. The data showed that inclisiran lowered low-density lipoproteins cholesterol (LDL-C) by more than 50% for a wide range of dyslipidemia patient populations and sub-groups, and by up to 44% in HoFH patients.
• In May, the Company presented the results of a pre-specified analysis of secondary endpoints from the ORION-1 Phase II trial at the 86^th European Atherosclerosis Society Congress. The results, which were published in Circulation, the journal of the American Heart Association, showed that, beyond its powerful effect on LDL-C, inclisiran also reduced atherogenic lipoproteins in a profound and sustained manner. Atherogenic lipoproteins – non-HDL-C, ApoB, VLDL-C and Lp(a) – have been associated with an increased risk of heart attacks and strokes, particularly in high-risk patients. The reductions, which were generally dose-dependent, were achieved most clearly with a 300 mg dose of inclisiran given on Day-1 and Day-90, and were sustained to the pre-specified time of assessment (180 days) and beyond (at least 210 days). This is the same starting dose of inclisiran being utilized in the Phase III trials (the Phase III dose of inclisiran is 300 mg given on Day-1 and Day-90, and then every six months thereafter).
• In June, the Company presented new data from a pre-specified, subgroup analysis of dosing, efficacy and safety of inclisiran in patients with diabetes from the ORION-1 Phase II trial at the American Diabetes Association 78^th Scientific Sessions^®. The data demonstrated that a subcutaneous injection of 300 mg of inclisiran given at Day-1 and Day-90 lowered LDL-C at Day-180 by more than 50% in patients with atherosclerotic cardiovascular disease (ASCVD) and those considered ASCVD-risk equivalents, regardless of whether those patients had diabetes. Importantly, the data showed that patients with and without diabetes experienced similar adverse event profiles, including no effects on control of blood glucose levels over six months.
• In June, the Independent Data Monitoring Committee (IDMC) for the ongoing inclisiran Phase III clinical trials conducted its third, planned review of safety and efficacy data from the trials and recommended that they continue without modification. At the time of the review, substantially all patients in trials had received two doses of inclisiran or placebo, and more than 1,550 patient-years of safety data for inclisiran had been accumulated – with an additional 5 patient-years of safety data continuing to accumulate every day.
• During the second quarter, the Company substantially completed the implementation of its previously-announced restructuring, as anticipated.

⁽¹⁾ Adjusted net loss and adjusted loss per share from continuing operations are non-GAAP financial performance measures with no standardized definitions under U.S. GAAP. For further information and a detailed reconciliation, refer to the "Non-GAAP Financial Performance Measures" and "Reconciliations of GAAP to Adjusted Loss From Continuing Operations and Adjusted Loss per Share" sections of this press release.

The webcast can be accessed in the "Investors" section of The Medicines Company website. A replay of the webcast will also be available.

The Medicines Company and Alnylam Pharmaceuticals, Inc. are collaborating in the advancement of inclisiran pursuant to their 2013 agreement. Under the terms of the agreement, Alnylam completed certain pre-clinical studies and the Phase I clinical study, with The Medicines Company leading and funding the development of inclisiran from Phase II forward, as well as potential commercialization.

The Medicines Company is a biopharmaceutical company driven by an overriding purpose – to save lives, alleviate suffering and contribute to the economics of healthcare. The Company's goal is to create transformational solutions to address the most pressing healthcare needs facing patients, physicians and providers in cardiovascular care. The Company is headquartered in Parsippany, New Jersey.

Statements contained in this press release about The Medicines Company that are not purely historical, and all other statements that are not purely historical, may be deemed to be forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. Without limiting the foregoing, the words "believes," "anticipates," "plans," "expects" and "potential' and similar expressions, are intended to identify forward-looking statements. These forward-looking statements involve known and unknown risks and uncertainties that may cause the Company's actual results, levels of activity, performance or achievements to be materially different from those expressed or implied by these forward-looking statements. Important factors that may cause or contribute to such differences include the ability of the Company to effectively develop inclisiran; whether inclisiran will advance in the clinical trials process on a timely basis or at all, or succeed in achieving its specified endpoints; whether the Company will make regulatory submissions for inclisiran on a timely basis; whether its regulatory submissions will receive approvals from regulatory agencies on a timely basis or at all; the extent of the commercial success of inclisiran, if approved; and such other factors as are set forth in the risk factors detailed from time to time in the Company's periodic reports and registration statements filed with the Securities and Exchange Commission (SEC), including, without limitation, the risk factors detailed in the Company's Quarterly Report on Form 10-Q filed with the SEC on May 9, 2018, which are incorporated herein by reference. The Company specifically disclaims any obligation to update these forward-looking statements.

In addition to financial information prepared in accordance with U.S. GAAP, this press release also contains adjusted loss from continuing operations and adjusted loss per share from continuing operations attributable to The Medicines Company. The Company believes these measures provide investors and management with supplemental information relating to operating performance and trends that facilitate comparisons between periods and with respect to projected information.

Adjusted loss from continuing operations excludes share-based compensation expense, amortization of acquired intangible assets, asset impairment charges, inventory adjustments, restructuring charges, charges associated with product discontinuance, changes in contingent purchase price, legal settlements, changes in short-term investments and non-cash interest expense. The Company believes these non-GAAP financial measures help indicate underlying trends in the Company's business and are important in comparing current results with prior period results and understanding projected operating performance. Non-GAAP financial measures provide the Company and its investors with an indication of the Company's baseline performance before items that are considered by the Company not to be reflective of the Company's ongoing results. See the attached Reconciliations of GAAP to Adjusted Loss from Continuing Operations and Adjusted Loss per Share for explanations of the amounts excluded and included to arrive at adjusted net loss and adjusted loss per share amounts for the three- and six months ended June 30, 2018 and 2017.

These adjusted measures are non-GAAP and should be considered in addition to, but not as a substitute for, the information prepared in accordance with U.S. GAAP. The Company strongly encourages investors to review its consolidated financial statements and publicly-filed reports in their entirety and cautions investors that the non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures.

In addition to the financial information prepared in accordance with U.S. GAAP, this press release also contains adjusted financial measures that the Company believes provide investors and management with supplemental information relating to operating performance and trends that facilitate comparisons between periods and with respect to projected information. These adjusted measures should be considered in addition to, but not as a substitute for, the information prepared in accordance with U.S. GAAP. The Company strongly encourages investors to review its consolidated financial statements and publicly filed reports in their entirety and cautions investors that the non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures.