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Anuja Roy,1 Andrew Peterson,2 Nick Marchant,1 Jose Alvir,3 Rahul Bhambri,4 Jason Lynn,4 Darrin Benjumea,5 Sapna Prasad,6 Alex O’Brien,6 Yong Chen,7 Jason Kemner,8 Bhash Parasuraman8 1Global HEOR, Patient & Health Impact, Rare Diseases BU, Pfizer Inc, New York, NY, USA; 2Department of Pharmacy Practice/Pharmacy Administration, University of the Sciences, Philadelphia, PA, USA; 3Statistical Research and Data Science Center Global Product Development, Pfizer Inc, New York, NY, USA; 4Medical Affairs, Pfizer Inc, New York, NY, USA; 5Evidence Strategy, Genesis Research, Hoboken, NJ, USA; 6Clarify Insights Services, Clarify Health Solutions, New York, NY, USA; 7Rare Disease, Pfizer Inc, Collegeville, PA, USA; 8Patient & Health Impact, Pfizer Inc, Collegeville, PA, USACorrespondence: Anuja Roy, Global HEOR, Patient & Health Impact, Rare Diseases BU, Pfizer Inc, New York, NY, USA, Email Anuja.Roy@pfizer.comIntroduction: Transthyretin amyloid cardiomyopathy (ATTR-CM) is a serious, underrecognized condition, which leads to heart failure and early mortality if left untreated. Until recently, heart transplantation was the only treatment for ATTR-CM. Regulatory approval of tafamidis transformed treatment for patients. In the phase 3 Transthyretin Amyloidosis Cardiomyopathy Clinical Trial (ATTR-ACT), which established the safety and efficacy of tafamidis, medication adherence was high with 97.2% of patients taking ≥ 80% of scheduled doses. Evidence of real-world adherence to cardiology drugs demonstrates low adherence and suboptimal outcomes; however, real-world adherence to tafamidis has not been investigated. The main objective of this study was to describe adherence patterns of patients filling tafamidis in the Symphony Health database.Methods: This retrospective analysis of the Symphony Health Solutions claims database used secondary adherence measures, including modified medication possession ratio (MPRm), days between fills adherence rate, and compliance rate, to assess adherence patterns of 2020 patients filling tafamidis free acid 61-mg capsules or tafamidis meglumine 4x20-mg capsules from June 1, 2019 to August 31, 2020.Results: Patients receiving a tafamidis formulation had characteristics consistent with the expected patient population; 71.6% were aged 75– 84 years, 83.2% were male, and the highest proportion resided in the Northeast region (30.5%) of the United States. Adherence for tafamidis was high, as 75% to 100% of the patients across subgroups met or exceeded the commonly defined adherence threshold of 80%. Median number of refills ordered and received was six refills per patient. Most patients received refills with no gap (n=1633) or a gap < 30 days (n=1267/1317 patients). Adherence was high across follow-up time, sex, and age subgroups. Adherence varied by geographic region, with the Northeast being significantly higher than the Midwest (mean MPRm 94.41% vs 88.21%, p=0.0007).Conclusion: These results provide evidence that real-world adherence to tafamidis in patients with ATTR-CM is high.Keywords: claims analysis, amyloidosis, cardiomyopathy, transthyretin amyloid, adherence

Peter C Taylor,1 Rieke Alten,2 Juan J Gomez Reino,3 Roberto Caporali,4 Philippe Bertin,5 Emma Sullivan,6 Robert Wood,6 James Piercy,6 Radu Vasilescu,7 Dean Spurden,8 Jose Alvir,9 Miriam Tarallo10 1Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; 2Department of Internal Medicine II, Rheumatology, Clinical Immunology, and Osteology, Schlosspark Klinik, University Medicine Berlin, Berlin, Germany; 3Experimental and Observational Rheumatology and Rheumatology Unit, Fundacion Ramon Dominguez and Rheumatology, Hospital Clinico Universitario, Santiago de Compostela, Spain; 4Division of Rheumatology, IRCCS Foundation Policlinico S. Matteo, University of Pavia, Pavia, Italy; 5Service de Rhumatologie, CHU Dupuytren, Limoges, France; 6Real-World Evidence and Epidemiology, Adelphi Real World, Bollington, UK; 7Medical Affairs, International Developed Markets, Pfizer, Brussels, Belgium; 8Health Economics and Outcomes Research, Pfizer Ltd, Tadworth, UK; 9Statistical Research and Data Science Center, Global Product Development, Pfizer Inc, New York, NY, USA; 10Patient and Health Impact, Pfizer Italia Srl, Rome, Italy Objective: The aim of this study was to identify factors that influence treatment adjustments and adoption of a treat-to-target (T2T) strategy in patients with rheumatoid arthritis (RA) in European practices.Methods: Cross-sectional data were drawn from the Adelphi 2014 RA Disease Specific Programme. Treatment patterns and clinical characteristics were investigated in patients treated with biologic disease-modifying antirheumatic drugs (bDMARDs) vs non-bDMARDs. For the T2T analysis, patients were subdivided into two subsets (RA diagnosis

Katsuyuki Fukutake,1,2 Kanae Togo,3 Linghua Xu,3 Leona E Markson,4 José Maria Jimenez Alvir,5 Ian Winburn,6 Toshiyuki Karumori3 1Laboratory Medicine, Tokyo Medical University, Shinjuku, Tokyo, Japan; 2Department of Blood Coagulation Diseases, Ogikubo Hospital, Suginami, Tokyo, Japan; 3Pfizer Japan Inc, Shibuya-ku, Tokyo, Japan; 4Pfizer Inc, Collegeville, PA, USA; 5Pfizer Inc, New York, NY, USA; 6Pfizer Ltd, Surrey, UKCorrespondence: Toshiyuki Karumori, Pfizer Japan Inc, Shinjuku Bunka Quint Bldg, 3-22-7, Yoyogi, Shibuya-ku, Tokyo, Japan, Tel +81-80-4152-4243, Email Toshiyuki.karumori@pfizer.comIntroduction: Until extended half-life (EHL) factor IX (FIX) concentrates became available in Japan in 2010, patients with hemophilia B received intravenous FIX replacement therapy with standard half-life (SHL) FIX concentrates.Purpose: To investigate the amount of factor dispensed and the associated medical expenditures for the treatment of hemophilia B in the real-world clinical setting in Japan.Methods: This retrospective study comprised patients with hemophilia B (N=197) who had filled prescriptions for FIX concentrates reported in Japan’s Medical Data Vision database from 2015 to 2019. Patients were included if they had 2 or more prescriptions for the same FIX concentrates within the first 6 months of the study period and the interval between prescriptions was at least 2 weeks.Results: Since 2015, there was a decrease in the proportion of patients using SHL FIX concentrates and a corresponding increase in international units of dispensed EHL FIX concentrates. Median annualized dispensed dosages (IU/kg body weight) of EHL FIX concentrates were lower than for SHL concentrates for outpatient use only. Annual total health care expenditures per patient and annual expenditures for prescribed FIX concentrates increased each year during the study period. Following a switch from an SHL to an EHL concentrate, the median amount of prescribed FIX concentrate decreased slightly, although median total health care expenditures and FIX concentrate expenditures increased.Conclusion: In the real-world setting in Japan, medical expenditures and the proportion of patients prescribed EHL FIX concentrates for the treatment of hemophilia B have increased.Keywords: blood coagulation factors, drug labeling, factor IX, health care administrative claims, health care costs

Justine Alderfer,1 Jyoti Aggarwal,2 Kim Gilchrist,1 Jose Maria Jimenez Alvir,3 Joseph Cook,4 Sang Hee Park,5 Jennifer M Stephens5 1Medical Affairs, Pfizer Inc., Collegeville, PA, USA; 2Evidence & Access, OPEN Health, Newton, MA, USA; 3Global Product Development, Pfizer Inc., New York, NY, USA; 4Clinical Development and Medical Affairs, Viatris, Canonsburg, PA, USA; 5Evidence & Access, OPEN Health, Bethesda, MD, USACorrespondence: Justine Alderfer, US Medical Affairs, Pfizer, 500 Arcola Rd., Collegeville, PA, 19426, USA, Tel +1 484-865-3105, Email Justine.Alderfer@pfizer.comBackground: Despite demonstration of bioequivalence of generics to brands and the potential for reduced costs, some patients switch back from a generic to the brand. A prior retrospective analysis suggested that this switchback rate may be lower among patients that had initially switched to authorized generics (AG), often both produced and marketed by the brand company, compared to those initially switched to another generic.Objective: Explore switching patterns of brands, AGs, and generics, switchback rates, and the potential impact of switchbacks on healthcare costs.Methods: An analysis of the Pharmetrics Plus™ database (2007– 2019), a United States (US) payer administrative database, was conducted to examine the use of Upjohn medications available as AGs across multiple therapeutic areas. Patients initiating treatment with brand medication in the 6 months prior to generic market entry were identified and switch rates to generics and AGs, as well as switchback rates, were evaluated. Costs were descriptively compared between patients who switched back to brand and those who remained on any generic.Results: Across 14 brand medications, more than half of the patients initiating treatment with the brand medication were switched to a generic. Generally, switching to AG, which ranged from 0.5 to 39.6%, was lower than switching to non-AG generics (16.7– 79.9%). The comparison of switchback rates from AGs to brand and non-AGs to brand showed similar results (AG:1.3– 7.5%; non-AG:1.4– 12.9%); however, the most substantial differences were observed where non-AG switchbacks were higher. Patients that switched back to brand remained on AG or generic for an average of 1– 3 months (32– 88 days). The analysis showed a tendency towards increased medical costs in the period immediately preceding switchback for all medications except sildenafil in both indications (erectile dysfunction and pulmonary arterial hypertension). For the remaining medications, medical costs ranged from $63 to $1544 higher for the switchback population. Pharmacy costs similarly tended to be higher for patients who had a switchback, with the exception of sildenafil for pulmonary arterial hypertension and sirolimus.Conclusion: Patients receiving a brand medication are likely to be switched to a generic upon market availability. Some patients switch back to the brand medication, usually within 1– 3 months; this may be associated with increased medical costs. Additional research is needed to understand switching, its potential disruption to patients, and the role of brands, generics, and AGs.Keywords: authorized generic, Generic, medication switching, costs