Exhibit 99.1

1 CONFIDENTIAL © 2021 Eagle Pharmaceuticals, Inc. All rights reserved. January 2021

2 CONFIDENTIAL © 2021 Eagle Pharmaceuticals, Inc. All rights reserved. Forward Looking Statements This presentation contains forward - looking information within the meaning of the Private Securities Litigation Reform Act of 199 5, as amended, and other securities laws. Forward - looking statements are statements that are not historical facts. Words and phrases such as “anticipated,” “forward,” “will,” “would,” “m ay,” “remain,” “potential,” “prepare,” “expected,” “believe,” “plan,” “near future,” “belief,” “guidance,” and similar expressions are intended to identify forward - looking statements. These statemen ts include, but are not limited to, statements regarding future events such as: the number and timing of potential product launches; development initiatives and potential indications for RY ANO DEX, including the potential for RYANODEX as a treatment for nerve agent exposure, acute radiation syndrome, traumatic brain injury and Alzheimer’s disease (EA - 112); the timing of poten tial product launches for Vasopressin and the period of market exclusivity for Vasopressin; the Company's clinical development plan for its fulvestrant product candidate, EA - 114, as we ll as the development efforts for the other product candidates in its portfolio; the timing, scope or likelihood of regulatory filings and approvals from the FDA for the Company’s product can didates, including the Company’s ability to work with the FDA to finalize the Special Protocol Assessment and advance the development of RYANODEX for brain damage secondary to nerve agent ex pos ure; the timing of the Company's PEMFEXY launch, if ever; the success of the Company's collaborations with its strategic partners and the timing and results of these par tners’ preclinical studies and clinical trials; and the Company's plans and ability to advance the products in its pipeline. All of such statements are subject to certain risks and uncertaint ies , many of which are difficult to predict and generally beyond the Company's control, that could cause actual results to differ materially from those expressed in, or implied or projected by, the forward - looking information and statements. Such risks and uncertainties include, but are not limited to: the impacts of the COVID - 19 pandemic, including disruption or impact in the sales of the Company's marketed products; interruptions or other adverse effects to clinical trials; delays in regulatory review; manufacturing and supply chain interruptions; adverse effect s o n healthcare systems; disruption in the operations of the Company's third party partners and disruption of the global economy, and the overall impact of the COVID - 19 pandemic on the Comp any's business, financial condition and results of operations; risks that the Company's business, financial condition and results of operations will be impacted by the spread o f C OVID - 19 in the geographies where the Company's third - party partners operate; whether the Company will incur unforeseen expenses or liabilities or other market factors; risks that resul ts from in vitro laboratory tests of RYANODEX are not necessarily predictive of future clinical trial and in vivo results; whether the Company will successfully implement its development plan fo r its fulvestrant product candidate, EA - 114, or other product candidates; delay in or failure to obtain regulatory approval of the Company's product candidates; whether the Company can su cce ssfully market and commercialize its product candidates; the success of the Company's relationships with its partners, including the United States Army Medical Research Institute of Che mical Defense, University of Pennsylvania, Teva, Tyme , NorthShore University HealthSystem and SymBio and the parties' ability to work effectively together; the availability and pricing of third party sourced products and mater ia ls; the outcome of litigation involving any of the Company’s products or that may have an impact on any of the Company’s products; successful co mpl iance with the FDA and other governmental regulations applicable to product approvals, manufacturing facilities, products and/or businesses; general economic conditions, including th e potential adverse effects of public health issues, including the COVID - 19 pandemic, on economic activity and the performance of the financial markets generally; the strength and enforceabil ity of the Company's intellectual property rights or the rights of third parties; competition from other pharmaceutical and biotechnology companies and the potential for competition fro m generic entrants into the market; the risks inherent in the early stages of drug development and in conducting clinical trials; and those risks and uncertainties identified in the “Risk Fa ctors” sections of the Company's Annual Report on Form 10 - K for the year ended December 31, 2019 as updated by the company’s subsequent filings with the Securities and Exchange Commissi on. Readers are cautioned not to place undue reliance on these forward - looking statements that speak only as of the date hereof, and the Company does not undertake any obligation to revise and disseminate forward - looking statements to reflect events or circumstances after the date hereof, or to reflect the occurrence of or non - occurrence of any events.

3 CONFIDENTIAL © 2021 Eagle Pharmaceuticals, Inc. All rights reserved. 10 Programs - Potential for 5 Launches in the Next 3 Years Product Indication Potential Market Advantage Development Stage In - House/Partnership CNS/METABOLIC CRITICAL CARE RYANODEX* 1. Nerve Agent (NA) Exposure First in class Initiating dose ranging studies in another animal model using IV administration with arm using an IM formulation of EA - 111. Preliminary results expected to allow the Company to update its SPA with FDA United States Army Medical Research Institute of Chemical Defense 2. Acute Radiation Syndrome (ARS) Completed POC study; entering first of two registration animal studies under FDA Animal Rule; next, Eagle expects to conduct a GLP study in a validated animal model (in - house) 3. Traumatic Brain Injury (TBI)/Concussion Preclinical animal study in progress; expect study results with NorthShore University HealthSystem in 1H 2021 NorthShore University HealthSystem Dr. Julian Bailes 4. Alzheimer’s Disease (AD) Completed preclinical animal study University of Pennsylvania 5. Anti - viral Preclinical (in - house) EA - 111 6. NCE related to dantrolene Preclinical and toxicology studies in progress (in - house) VASOPRESSIN* 7. Increase blood pressure during vasodilatory shock First to file † Submitted responses to all of FDAs outstanding questions; patent trial date now set for February 1, 2021; anticipate launch with 180 - day market exclusivity (in - house) ONCOLOGY SM - 88 8. Pancreatic and Other Cancers First in Class Pivotal studies underway for pancreatic cancer Tyme Technologies EA - 114 ( fulvestrant ) 9. HR+/HER2 - Advanced Breast Cancer (BC) Best in Class Held positive Type C meeting with FDA; in process of gaining agreement on formal clinical study protocol (in - house) PEMFEXY* (liquid injection) 10. Nonsquamous Non - Small Cell Lung Cancer (NSCLC) – malignant pleural mesothelioma First to Market Approval granted on February 10, 2020; Q1 2022 launch; unique J - code established by CMS; granted supplement approval for 500mg multiple - dose vial (in - house) * Royalty obligation † First to file ANDA referencing VASOSTRICT; submission accepted for filing by FDA March 2018

4 CONFIDENTIAL © 2021 Eagle Pharmaceuticals, Inc. All rights reserved. Thank You