Management's Discussion and Analysis of Financial Condition and Results of
Operations is intended to help the reader understand the results of operations
and the financial condition of Supernus Pharmaceuticals, Inc. (the Company, we,
us, or our). The interim financial statements included in this report and this
Management's Discussion and Analysis of Financial Condition and Results of
Operations should be read in conjunction with our audited consolidated financial
statements and notes thereto for the year ended December 31, 2019 and the
related Management's Discussion and Analysis of Financial Condition and Results
of Operations, both of which are contained in our Annual Report on Form 10-K,
filed with the Securities and Exchange Commission on February 28, 2020.
In addition to historical information, this Quarterly Report on Form 10-Q
contains forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933, as amended, and Section 21E of the Securities Exchange
Act of 1934, as amended, which are intended to be covered by the safe harbors
created thereby. These forward-looking statements may include declarations
regarding the Company's belief or current expectations of management, such as
statements including the words "budgeted," "anticipate," "project," "forecast,"
"estimate," "expect," "may," "believe," "potential," and similar statements or
expressions, which are intended to be among the statements that are
forward-looking statements, as such statements reflect the reality of risk and
uncertainty that is inherent in our business. Actual results may differ
materially from those expressed or implied by such forward-looking statements.
Readers are cautioned not to place undue reliance on these forward-looking
statements, which are made as of the date this report was filed with the
Securities and Exchange Commission. Our actual results and the timing of events
could differ materially from those discussed in our forward-looking statements
as a result of many factors, including those set forth under the "Risk Factors"
section of our Annual Report on Form 10-K and elsewhere in this report as well
as in other reports and documents we file with the Securities and Exchange
Commission from time to time. Except as required by law, we undertake no
obligation to update any forward-looking statements to reflect events or
circumstances occurring after the date of this Quarterly Report on Form 10-Q.
Solely for convenience, in this Quarterly Report on Form 10-Q, the trade names
are referred to without the TM symbols and the trademark registrations are
referred to without the circled R, but such references should not be construed
as any indicator that the Company will not assert, to the fullest extent under
applicable law, our rights thereto.

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Overview

We are a pharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. We have a portfolio of commercial products and product candidates.



On April 21, 2020, the Company entered into a Development and Option Agreement
(Development Agreement) with Navitor Pharmaceuticals, Inc. (Navitor). Under the
terms of the Development Agreement, the Company and Navitor will jointly conduct
a Phase II clinical program for NV-5138 in treatment-resistant depression.

On April 28, 2020, the Company entered into a Sales and Purchase Agreement to
acquire the CNS portfolio of US WorldMeds Partners, LLC. With the acquisition,
the Company will add three established, marketed products and a product
candidate in late-stage development to its portfolio.

COVID-19 Impact



The Company is closely monitoring the impact of the COVID-19 pandemic on all
aspects of our business operations, and has assessed the impact of the COVID-19
pandemic on our condensed consolidated financial statements. Although the
COVID-19 pandemic has not significantly impacted our condensed consolidated
financial statements as of March 31, 2020 and during the three month period then
ended, it may have future impact, especially if the severity worsens, duration
lengthens, or the nature of the impacts changes.

The full impact of the COVID-19 pandemic is highly uncertain and subject to
change. Such effects may vary significantly across different aspects of our
business operations. The Company cannot yet know the full extent of potential
delays, impacts on its business, financial conditions, the healthcare systems,
or the economy. These effects could have material impact on the Company's
liquidity, capital resources, operations and business. See "Risk Factors" in
Part II, Item 1A of this Quarterly Report on Form 10-Q for additional
information on risk factors that could impact our business and results.

The risks and uncertainties resulting from the COVID-19 pandemic may affect our
future earnings, cash flows and financial condition. These effects include:
adverse impact on research and development activities as a result of temporarily
halting additional enrollment in the SPN-812 adult trial; adverse impact on
selling and marketing efforts as a result of temporarily halting in-person
interactions by our sales force with healthcare providers; adverse impact on net
product sales as a result of decreased new prescriptions due to fewer patient
visits to physician's offices to begin or to maintain treatment; potential
changes in payer segment mix; and increased use of co-pay programs due to rising
unemployment. Financial effects could include impairment of intangible and
long-lived assets, increased reserves for sales deductions that could impact our
net product sales; and adjustments for market volatility for items subject to
fair value measurement, such as marketable securities.

For the three months ended March 31 2020, with the exception of effects already
cited, we were able to largely maintain our normal operations. Because the
COVID-19 pandemic has not materially impacted our operations or demand for our
products, it has also not negatively impacted our liquidity position in a
material way. We expect to continue to generate cash flows to meet our
short-term liquidity needs and have access to liquidity.

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Products and Product Candidates

The table below summarizes our current portfolio of novel products and product candidates:


                    [[Image Removed: supn-20200331_g1.jpg]]


* Prophylaxis of migraine headache in adults and adolescents. ** SPN-820 = NV-5138 (Navitor Partnership)



    We devote significant resources to research and development of product
candidates and proprietary drug technologies. We expect to incur significant
expenses as we: invest in research and development related to the continued
development of each of our product candidates through U.S. Food and Drug
Administration (FDA) approval or until the program terminates; expand product
indications for approved products; invest in sales and marketing resources for
existing and new products; enter into agreements to purchase products, product
candidates or other companies; and invest in support of our business,
technology, regulatory and intellectual property portfolio.
Our Neurology Portfolio
Our neurology portfolio includes two commercial products and one product
candidate for the treatment of neurological diseases.
Commercial Products
Trokendi XR is a once-daily extended release topiramate product for the
prophylaxis of migraine headache and for the treatment of epilepsy. We believe a
once-daily dosing regimen improves compliance, making it more probable that
patients take their medication and maintain sufficient levels of medication in
their bloodstream. Trokendi XR's unique smooth pharmacokinetic profile results
in lower peak plasma concentrations, higher trough plasma concentrations, and
slower plasma uptake rates. This results in smoother and more consistent plasma
concentrations than immediate release topiramate formulations. We believe that
such a profile mitigates blood level fluctuations that are frequently associated
with many side effects, thereby reducing the likelihood of breakthrough seizures
or migraine headaches that patients can suffer when taking immediate release
products. Side effects associated with immediate release products may lead
patients to skip doses, which could place them at higher risk for breakthrough
seizures or migraine headaches.
Oxtellar XR is a once-daily extended release oxcarbazepine product that was
initially approved for adjunctive treatment of partial onset seizures of
epilepsy. With its novel pharmacokinetic profile showing lower peak plasma
concentrations, a slower rate of plasma input, and smoother and more consistent
blood levels as compared to immediate release products, we believe Oxtellar XR
improves the tolerability of oxcarbazepine and thereby reduces side effects. In
addition, Oxtellar XR once-per-day dosing is designed to improve patient
compliance compared to the current immediate release products that must be taken
multiple times per day.

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Product Prescriptions


    The following table provides data regarding our prescriptions, as reported
by IQVIA, during the periods indicated, including percentage changes in volume:
                              Three Months ended
                                  March 31,                                    Change
                             2020               2019         Volume       Percent
Prescriptions
Trokendi XR                    160,315        160,940         (625)         -%
Oxtellar XR                     43,089         38,580        4,509          12%
Total prescriptions            203,404        199,520        3,884          2%


Product Candidate
SPN-817 (huperzine A)
SPN-817 will have new chemical entity status (NCE) in the U.S. market. We expect
to develop intellectual property (IP) protecting this product candidate through
our own research and development efforts, as well as through in-licensed IP.
SPN-817 represents a novel mechanism of action for an anticonvulsant.
Development will initially focus on the drug's anticonvulsant activity, which
has been shown in preclinical models for treatment of partial seizures and
Dravet Syndrome. SPN-817 is in clinical development, and has received an Orphan
Drug designation for Dravet Syndrome from the FDA.
SPN-817 Development Program

We plan on studying SPN-817 initially in severe epilepsy disorders. A Phase I
proof-of-concept trial is currently underway outside of the U.S. in adult
patients with refractory complex partial seizures, studying the safety and
pharmacokinetic profile of a new extended release formulation of non-synthetic
huperzine A. The Company initiated preclinical Investigational New Drug (IND)
enabling activities in the U.S.
We will focus on completing and optimizing the synthesis process of the
synthetic drug and developing a novel dosage form. Given the potency of
huperzine A, a novel extended release oral dosage form is critical to the
success of this program, because initial studies with the immediate release
formulations of non-synthetic huperzine A have shown dose-limiting, serious side
effects.
Our Psychiatry Portfolio
Our psychiatry portfolio includes two product candidates, SPN-812 and SPN-820,
for the treatment of psychiatric disorders.
Product Candidate
SPN-812 (extended release viloxazine hydrochloride)
SPN-812 is a serotonin norepinephrine modulating agent (SNMA), which we are
developing as a novel non-stimulant for the treatment of ADHD. We believe
SPN-812 could be well-differentiated as compared to other non-stimulant
treatments due to its different pharmacological and pharmacokinetic profile. The
active ingredient in SPN-812, viloxazine hydrochloride, has an extensive safety
record in Europe, where it was previously marketed for many years as an
antidepressant, albeit at much higher dosage levels. Viloxazine hydrochloride is
a structurally distinct, bicyclic, SNMA with NCE status in the U.S.
The FDA accepted the review of the NDA for SPN-812 for the treatment of children
and adolescents with ADHD in January 2020 and assigned a PDUFA target action
date of November 8, 2020. We plan to launch it, pending FDA approval, in the
fourth quarter of 2020. We expect SPN-812, if approved, to have five-year market
exclusivity due to its NCE status in the U.S. Furthermore, we are pursuing IP
covering the novel synthesis process for the active ingredient in SPN-812, its
novel use in ADHD and its novel extended release product profile.

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SPN-812 Development Program
We continue to prepare for the commercial launch of SPN-812 at the end of 2020.
The Company remains engaged with the FDA regarding the NDA for SPN-812 for the
treatment of ADHD.
We initiated a Phase III program in adults in the third quarter of 2019. The
SPN-812 adult trial reached approximately 75% of the targeted enrollment before
additional enrollment was put on hold in March 2020 due to the impact of
COVID-19. We are employing virtual efforts to ensure that currently enrolled
subjects can progress to completion of treatment. This trial was ahead of
schedule prior to the COVID-19 pandemic, with a potential data release in the
second half of this year. Depending on when the Company can restart enrollment
and complete the study, data from the trial may be pushed out into 2021.

Patents


We currently have ten U.S. patents that cover Trokendi XR. We have one patent
issued for extended release topiramate in each of the following countries:
Mexico; Australia; Japan; and Canada. We have two patents issued in Europe. The
ten issued U.S. patents covering Trokendi XR will expire no earlier than 2027.
We own all of the issued patents.
The Company has entered into settlement agreements with third parties,
permitting sale of a generic version of Trokendi XR on January 1, 2023, or
earlier under certain circumstances.
Our extended release oxcarbazepine patent portfolio currently includes twelve
U.S. patents, nine of which cover Oxtellar XR. The nine issued U.S. patents
covering Oxtellar XR will expire no earlier than 2027. We have two issued
patents for extended release oxcarbazepine in both Europe and Australia, and one
patent issued in each of the following countries: Canada; Japan; China and
Mexico. In addition, we have a pending U.S. patent application that covers
various extended release formulations containing oxcarbazepine. We own all of
the issued patents and the pending U.S. patent application.
For our pipeline product, SPN-812, we have three families of pending U.S.
non-provisional and foreign counterpart patent applications. Patents, if issued,
could expire from 2029 to 2033. We have one patent issued each in Europe and
Canada, covering a method of treating ADHD using viloxazine hydrochloride. In
another family, covering the novel synthesis process of active ingredient, we
have four patents issued in the U.S., five patents issued in Mexico, two patents
issued in Japan, and one patent issued each in Europe, Canada and Australia. We
have four patents issued in the U.S. covering modified release formulations of
viloxazine hydrochloride, two patents issued in Japan and Australia and one
patent issued in Mexico. We own all of the issued patents and the pending patent
applications.
We continue to build our intellectual property portfolio to provide additional
protection for our technologies, products and product candidates.
To protect our competitive position, it may be necessary to enforce our patent
rights through litigation against infringing third parties. See Part II, Item
1-Legal Proceedings for additional information.
Critical Accounting Policies and the Use of Estimates
The significant accounting policies and basis of presentation for our condensed
consolidated financial statements are described in Part I, Item 1, Financial
Statements, Note 2, Summary of Significant Accounting Policies, in the Notes to
the Condensed Consolidated Financial Statements. Our condensed consolidated
financial statements are prepared in accordance with U.S. generally accepted
accounting principles (U.S. GAAP), requiring us to make estimates and
assumptions that affect the reported amounts of assets, liabilities, revenues,
and expenses, and to disclose material contingent assets and liabilities. Actual
results could differ materially from our estimates.
We believe the following accounting policies and estimates to be critical:
Revenue Recognition

Revenue from product sales is recognized when physical control of our products
is transferred to our customers, who are primarily pharmaceutical wholesalers
and distributors. Product sales are recorded net of various forms of variable
consideration, including: estimated rebates; sales discounts; and an estimated
liability for future product returns (collectively, "sales deductions"). We
adjust our estimates at the earlier of when the most likely amount of
consideration we expect to receive changes, or when the consideration becomes
fixed. For a complete description of our revenue recognition policy, see
Part I, Item 1, Financial Statements, Note 2, Revenue from Product Sales, in the
Notes to Condensed Consolidated Financial Statements. In addition, see Results
of Operations, Sales deductions and related accruals for more information.

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Research and Development Expenses and Related Accrued Research and Development Expenses



Research and development expenditures are expensed as incurred. We estimate
preclinical and clinical trial expenses based on services performed pursuant to
contracts with research institutions, clinical investigators, clinical research
organizations (CROs) and other service providers that conduct activities on the
Company's behalf. If the actual timing of the performance of services or the
level of effort varies from our estimate, we adjust our accrued expenses or our
deferred advance payments accordingly. For a complete description of our
research and development expense, preclinical trial, and clinical trial accrual
policies, see Part I, Item 1, Financial Statements, Note 2, Summary of
Significant Accounting Policies-Research and Development Expense and Related
Accrued Research and Development Expenses, in the Notes to Condensed
Consolidated Financial Statements.

Preclinical and clinical trials are inherently complex and often involve
multiple service providers. Because billing for services often lags by a month
or several months, we are often required to estimate, and therefore accrue, a
significant portion of the incurred expenses. This process involves reviewing
open contracts and communicating with our subject matter expert personnel, as
well as with the appropriate service provider personnel, to identify services
that have been performed on our behalf but for which no invoice has been
received. This includes services provided by CROs, as well as services provided
by clinical investigators and other service providers. We accrue the cost for
unbilled services performed, whether partially or fully completed.

Payments to service providers can either be based on hourly rates for service,
or based on achievement of performance driven milestones. We work with each
service provider to obtain an estimate for services provided but are unbilled as
of the end of the calendar quarter, including estimates for payments to site
investigators. When accruing clinical trial expenses, we estimate the time
period over which services will be performed during the life of the entire
clinical program, the total cost of the program, and the level of effort to be
expended in each intervening period.

We work diligently to minimize, if not eliminate, estimates based solely on
Company generated calculations by relying primarily on estimates provided by our
vendors. If we and/or the service provider underestimates or overestimates the
costs associated with a service at any given point in time, adjustments to
research and development expenses would be necessary in the following periods.
Historically, our estimated accrued clinical expenses have closely approximated
the actual expenses incurred, with minimal adjustments to expense in the
subsequent periods.

Results of Operations
Comparison of the Three Months ended March 31, 2020 and 2019
Revenues
Revenues consist of net product sales of Trokendi XR and Oxtellar XR in the
U.S., and royalty and licensing revenues from our collaborative licensing
arrangements. The following table provides information regarding our revenues
during the periods indicated, (dollars in thousands):
                               Three Months ended                            Change
                                   March 31,
                              2020           2019          Amount       Percent
Net product sales
Trokendi XR                $ 68,551       $ 63,693       $ 4,858          8%
Oxtellar XR                  23,939         19,406         4,533          23%
Total net product sales    $ 92,490       $ 83,099       $ 9,391          11%
Royalty revenues              2,486          2,375           111          5%
Total revenues             $ 94,976       $ 85,474       $ 9,502          11%


Net product sales
Net product sales are computed as gross revenue generated from our product
shipments to our customers, which are primarily pharmaceutical wholesalers and
distributors, less various forms of variable consideration, including: estimated
liability
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for rebates; estimated liability for future product returns; and estimated
allowance for discounts. These are collectively considered "sales deductions."
Total Net Product Sales
The increase in net product sales for the three months ended March 31, 2020 as
compared to the prior year, is primarily due to the favorable impact of the 8%
price increase taken January 1, 2020, favorable unit prescription growth for
Oxtellar XR and the adverse impact of the pipeline inventory reduction in 2019.
These effects were partially offset by unfavorable changes in net sales
deductions.
In the fourth quarter of 2018, wholesalers, distributors and pharmacies
increased their inventory holdings, as compared to the prevailing inventory
levels in the preceding quarter. This action was effectively reversed in the
first quarter of 2019. As a result, both gross sales and net product sales in
the first quarter of 2019 were adversely impacted, with the impact on net
product sales of approximately $10 million.
As regards to sales deductions, patient reimbursement challenges and increased
contracting pressure from managed care providers resulted in higher program
participation rates, increased per patient costs for our co-pay programs and
higher per patient rebate payments to managed care providers. As a result, this
increased the provision for sales deductions and reduced net product sales.
Trokendi XR
Trokendi XR net product sales increased by $4.9 million, or 8%, for the three
months ended March 31, 2020, as compared to the same period in 2019. This
increase was driven by the favorable impact of an 8% price increase in 2020. The
adverse impact in sales deductions year over year was essentially offset by the
negative impact in the first quarter of 2019 of the aforementioned channel
inventory reduction.
Oxtellar XR
Oxtellar XR net product sales increased by $4.5 million, or 23%, for the three
months ended March 31, 2020, as compared to the same period in 2019. The
increase was primarily attributable to growth in prescription unit volume and
the favorable impact from the 2020 price increase of 8%. These effects were
partially offset by increased net product sales deductions due to higher per
patient payments under both Medicaid and managed care programs, as well as
higher co-payment program expenditures.
Sales deductions and related accruals
The Company records accrued product rebates and accrued product returns in
Accrued product returns and rebates as current liabilities on our condensed
consolidated balance sheets. We record sales discounts as a valuation allowance
against Accounts receivable on the condensed consolidated balance sheets. These
outstanding amounts are generally affected by changes in the level of gross
product sales, changes in the provision for net product sales deductions and
timing of payments/credits.
The following table provides a summary of activities with respect to sales
deductions and related accruals during the periods indicated, (dollars in
thousands):
                                                    Accrued Product Returns and
                                                              Rebates
                                                     Product            Product           Allowance for
                                                     Rebates            Returns          Sales Discounts           Total
Balance at December 31, 2019                      $  88,811           $ 18,818          $       11,013          $ 118,642
Provision
Provision for sales in current year                  87,114              2,681                  15,524            105,319
Adjustments relating to prior year sales              3,716              7,951                     147             11,814
Total provision                                   $  90,830           $ 10,632          $       15,671          $ 117,133
Less: Actual payments/credits                       (85,029)            (4,609)                (16,398)          (106,036)
Balance at March 31, 2020                         $  94,612           $ 24,841          $       10,286          $ 129,739



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Balance at December 31, 2018               $ 85,003       $ 22,060       $ 11,548       $ 118,611
Provision
Provision for sales in current year          63,941          1,724         11,214          76,879
Adjustments relating to prior year sales       (844)           (42)           (43)           (929)
Total provision                            $ 63,097       $  1,682       $ 11,171       $  75,950
Less: Actual payments/credits               (82,010)        (1,632)       (14,909)        (98,551)
Balance at March 31, 2019                  $ 66,090       $ 22,110       $  7,810       $  96,010


The total provision for sales deductions on gross product sales increased by
$41.2 million, from $76.0 million in 2019 to $117.1 million in 2020.
Approximately 67% of this increase, or $27.7 million, was attributable to the
year over year increase in the provision for product rebates, from $63.1 million
in 2019 to $90.8 million in 2020.

    The year over year increase in the provision for product rebates is
primarily attributable to greater utilization of our patient co-payment
programs, as well as higher per patient payments under both Medicaid and managed
care programs. Growth in prescriptions, and the impact of the 8% price increase
taken in January 2020, also contributed to the increase in product rebates.
    The $9.0 million increase in the provision for product returns, from $1.7
million to $10.6 million for the three months ended March 31, 2019 and 2020,
respectively, was due primarily to unfavorable actual returns experience in the
first quarter of 2020 for discontinued blister pack Trokendi XR configurations.
The Company ceased production and distribution of all blister pack
configurations for Trokendi XR in 2017. Subsequent to ceasing blister pack
production and distribution in 2017, the observed rate of product return for all
blister pack configurations of Trokendi XR steadily declined over time. This
return rate trend was firmly established over a multi-year period. However, in
the first quarter of 2020, the return rate for the final blister pack lots of
Trokendi XR produced in 2017 exhibited a return rate significantly higher than
had been experienced with all previous lots. The lots for which a higher return
rate was observed are the last lots which were produced and distributed.
As a result, the Company changed its estimate of the provision for product
returns, based on the most recent experience. This change in estimate resulted
in an increase to the provision for product returns of $8.0 million, decreased
net product sales of $8.0 million and decreased net earnings of $5.9 million, or
$0.11 per basic and per diluted share, for the three months ended March 31,
2020.

The provision for sales discounts increased by $4.5 million, from $11.2 million to $15.7 million, for the three months ended March 31, 2019 and 2020. This increase was driven by prescription volume growth. Royalty Revenues



Royalty revenue includes royalties from the following products (dollars in
thousands):

                    Three Months ended
                        March 31,                               Change
                    2020           2019        Amount      Percent
Mydayis (1)     $     919       $   800       $ 119          15%
Orenitram (2)       1,567         1,575          (8)        (1)%
Total           $   2,486       $ 2,375       $ 111          5%






(1) Royalty from net product sales of Mydayis, a product of Shire Plc, a
subsidiary of Takeda Pharmaceuticals Company Ltd.
(2) Noncash royalty revenue pursuant to our agreement with Healthcare Royalty
Partners III, L.P. (HC Royalty). HC Royalty receives royalty payments from
United Therapeutics Corporation (United Therapeutics) based on net product sales
of United Therapeutics' product Orenitram. Supernus records noncash royalty
based on these product sales.
Royalty revenues were essentially flat for the three months ended March 31,
2020, compared to the same period in 2019.
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Cost of Goods Sold
The following table provides information regarding our cost of goods sold during
the periods indicated (dollars in thousands):
                         Three Months ended
                             March 31,                               Change
                         2020           2019        Amount      Percent
Cost of goods sold   $   4,152       $ 3,684       $ 468          13%


Cost of goods sold during the three months ended March 31, 2020 was $4.2
million, $0.5 million higher than the $3.7 million incurred for the same period
in 2019. The increase was primarily attributable to year over year increase in
prescriptions, as well as the aforementioned reduction in channel level
inventory which occurred in the first quarter of 2019.
Research and Development Expenses
The following table provides information regarding our research and development
(R&D) expenses during the periods indicated (dollars in thousands):
                               Three Months ended
                                   March 31,                                 Change
                              2020           2019          Amount       Percent

Research and development $ 18,937 $ 15,394 $ 3,543 23%




R&D expenses increased by $3.5 million in the three months ended March 31, 2020
as compared to the same period in 2019. The increase quarter over quarter was
primarily driven by enrollment in the SPN-812 Phase III program for adults that
was initiated in late 2019.
Selling, General and Administrative Expenses
The following table provides information regarding our selling, general and
administrative (SG&A) expenses during the periods indicated (dollars in
thousands):
                                  Three Months ended
                                      March 31,                                  Change
                                 2020           2019          Amount        Percent
Selling and marketing         $ 29,041       $ 30,749       $ (1,708)        (6)%
General and administrative      13,834         10,219          3,615          35%
Total                         $ 42,875       $ 40,968       $  1,907          5%


Selling and Marketing. Selling and marketing expenses decreased by $1.7 million
in the three months ended March 31, 2020 as compared to the same period in 2019.
The change was due to decreased employee-related expenses of $0.5 million and
marketing expense for commercial products of $2.3 million, partially offset by
increased professional and consulting spending for SPN-812 pre-launch activities
of $1.0 million.
General and Administrative. General and administrative expenses increased by
$3.6 million for the three months ended March 31, 2020 as compared to the same
period in 2019. The change was primarily due to the $1.4 million increase in
employee-related expenses due to increased headcount and higher share-based
compensation expense, $1.3 million increase in higher occupancy-related costs,
and $0.9 million increase in professional and consulting fees.
Other Income (Expense)
The following table provides the components of other income (expense) during the
periods indicated (dollars in thousands):
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                                                          Three Months ended
                                                               March 31,                                        Change
                                                        2020              2019             Amount          Percent
Interest income                                      $  5,777          $  4,681          $ 1,096             23%
Interest expense                                       (4,693)           (4,710)              17              -%
Interest expense on nonrecourse liability related to
sale of future royalties                               (1,062)           (1,160)              98             (8)%
Total                                                $     22          $ (1,189)         $ 1,211            (102)%

Interest income increased by $1.1 million for the three months ended March 31, 2020, primarily due to gains from sales and maturity of marketable securities.


    Interest expense for the three months ended March 31, 2020 remained
essentially unchanged, compared to the same period in 2019.
Noncash interest expense related to our nonrecourse royalty liability for the
three months ended March 31, 2020 remained unchanged as compared to the same
period in 2019.
Income Tax Expense
The following table provides information regarding our income tax expense during
the periods indicated (dollars in thousands):
                         Three Months ended
                             March 31,                               Change
                       2020              2019       Amount      Percent
Income tax expense    $7,516            $5,899      $1,617        27%
Effective tax rate    25.9%             24.3%


The increases in income tax expense and the effective tax rate for the three
months ended March 31, 2020, as compared to the same period in the prior year,
was primarily attributable to higher income before taxes, increase in the number
of states in which we owe taxes and an increase in non-deductible expenses.
Net Earnings

The following table provides information regarding our net earnings during the periods indicated (dollars in thousands):



                      Three Months ended March 31,                               Change
                     2020                        2019          Amount       Percent
Net earnings   $      21,518                  $ 18,340       $ 3,178          17%


The increase in net earnings was primarily due to increased revenue generated from our two commercial products, Trokendi XR and Oxtellar XR.

Liquidity and Capital Resources



We have financed our operations primarily with cash generated from product
sales, supplemented by cash generated by revenue from royalty and licensing
arrangements as well as proceeds from the sale of equity and debt securities.
Continued cash generation is highly dependent on the commercial success of our
two commercial products, Trokendi XR and Oxtellar XR. We were cash flow positive
and profitable from operations in 2019.

While we expect continued profitability for future years, we anticipate there
may be significant variability from year to year in the level of our profits,
particularly as we move forward with the anticipated commercial launch of
SPN-812 late in 2020, assuming FDA approval.

We believe our existing cash and cash equivalents, marketable securities and
cash received from product sales will be sufficient to finance ongoing
operations, develop our new products and fund label expansions for existing
products. To continue to grow our business over the long-term, we plan to commit
substantial resources to: product development and clinical trials of product
candidates; product acquisition; and in-licensing; and supportive functions such
as compliance, finance, management of
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our intellectual property portfolio, information technology systems and personnel. In each case, spending would be commensurate with the growth of the business.



We may, from time to time, consider raising additional capital through: new
collaborative arrangements; strategic alliances; additional equity and/or debt
financings; or financing from other sources, especially in conjunction with
opportunistic business development initiatives. We will continue to actively
manage our capital structure and to consider all financing opportunities that
could strengthen our long-term financial profile. Any such capital raises may or
may not be similar to transactions in which we have engaged in the past. There
can be no assurance that any such financing opportunities will be available on
acceptable terms, if at all.

Financial Condition

Cash and cash equivalents, marketable securities, long term marketable securities, working capital, convertible notes and total stockholder's equity, as of the periods presented below, are as follows (dollars in thousands):



                                        March 31       December 31               Change
                                          2020            2019           Amount         Percent

Cash and cash equivalents             $ 225,767       $  181,381       $ 44,386           24%
Marketable securities                   175,104          165,692          9,412           6%
Long term marketable securities         534,712          591,773        (57,061)         (10)%
Total                                 $ 935,583       $  938,846       $ (3,263)          -%

Working capital                         388,713          312,057         76,656           25%

Convertible notes, net (2023 Notes)     349,232          345,170          4,062           1%

Total stockholder's equity              613,383          595,428         17,955           3%

The total cash and cash equivalents, marketable securities and long term marketable securities decreased by $3.3 million in the first three months of 2020, primarily due to decreases in the valuation of long term marketable securities resultant from market volatility.


    Our working capital at March 31, 2020 was $388.7 million, an increase of
$76.7 million, as compared to $312.1 million at December 31, 2019. The increase
was primarily due to increased accounts receivable of $31.9 million and
increased cash, cash equivalents, and marketable securities of $53.8 million
offset by increases in current liabilities of $7.7 million during the three
months ended March 31, 2020.
As of March 31, 2020 and December 31, 2019, the outstanding principal on our
0.625% Convertible Senior Notes Due 2023 (2023 Notes) was $402.5 million. No
2023 Notes have been converted as of March 31, 2020. Contemporaneous with the
issuance of the 2023 Notes, the Company also entered into separate convertible
note hedge transactions (collectively, the Convertible Note Hedge Transactions),
issuing 402,500 convertible note hedge options. The Convertible Note Hedge
Transactions are expected to reduce the potential dilution of the Company's
common stock upon conversion of the 2023 Notes. Concurrently with entering into
the Convertible Note Hedge Transactions, the Company also entered into separate
warrant transactions, issuing a total of 6,783,939 warrants (the Warrant
Transactions). See Part I, Item 1, Financial Statements, Note 5, Convertible
Senior Notes Due 2023, in the Notes to the Condensed Consolidated Financial
Statements, for further discussion of the 2023 Notes and our other indebtedness.
Stockholders' equity increased by $18.0 million during the three months ended
March 31, 2020, primarily as a result of net earnings of $21.5 million coupled
with share-based compensation of $4.0 million. These increases were offset by
unrealized losses on marketable securities, net of tax of $7.6 million.
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