[1]

In accordance with the asset purchase agreement, the Company has deposited $10.0 million in an escrow fund to be held for a period of 12 months from the closing date as a security to pay, or be applied against, any losses incurred by the Company that are subject to the general representations, warranties and indemnification obligations of Zogenix. The Company is considered to be the legal and tax owner of the fund until the expiration of the escrow period of 12 months. Accordingly, the amount of $10 million in the escrow fund is recognized as restricted cash and consideration payable to Zogenix. Restricted cash is presented separately under current assets while the consideration payable is included in current liabilities.

[2]

Under the asset purchase agreement, the Company purchased a specified quantity of Generation 1 version of Zohydro ER product line from Zogenix on the closing date for $927,000. Shortly before the closing date, Generation 2 version of Zohydro ER with Beadtek was approved by FDA and was announced by the Company to be launced in immediate future. This announcement for launch of Zohydro ER with Beadtek made the Generation 1 version of Zohydro ER obsolete and unsellable in the market. As a result, the fair value of the Generation 1 product inventory acquired from Zogenix has been estimated to be de-minimis on the closing date.

[3]

Under the asset purchase agreement, the number of common shares issued to Zogenix equaled $20 million divided by closing price of common stock on a trading day immediately preceding the purchase agreement date. The closing price of common stock of Pernix on March 9, 2015 (i.e. trading day immediately preceding the purchase agreement date) was $11.89. Accordingly, Pernix issued 1,682,086 shares of common stock to to Zogenix ($20 million/$11.89 per share). The common stock issued by the Company is measured at fair value at the closing date (i.e. April 24, 2015) in accordance with the measurement guidance in ASC 805. The closing price of common stock of the Company on closing date was $7.09 and accordingly the fair value of common stock issued by the Company on the closing date was determined to be $11.9 million. $16,820 representing the par value of 1,682,086 shares at $0.01 per share was recorded in common stock and the remaining amount of $11.9 million was recorded in Additional paid-in-capital.

[4]

Contingent consideration includes (a) $12.5 million milestone payment payable upon approval of ZX007 abuse-deterrent extended-release hydrocodone tablet, and (b) up to $271 million payable if the Zohydro ER product line achieves certain agreed-upon net sales targets. Each type of contingent consideration has been recognized as a separate unit of account. In accordance with the provisions of ASC 805-30-25-5, each unit of contingent consideration is recognized at the acquisition date fair value. The acquisition date fair value of the contingent consideration linked to FDA approval is $10.3 million and the fair value of the contingent consideration linked to achievement of net sales target is $19.0 million. The total contingent consideration of $29.3 million is classified in other long-term liabilities. Such fair values are determined based on probabilistic model with weights assigned on likelihood of the Company achieving the sales target in future. Each unit of contingent consideration is classified as a liability in the balance sheet and would be subsequently measured at fair value on each reporting date. Any change in fair values between the reporting dates would be recognized in the consolidated statement of operations.

[5]

As of the effective time of the acquisition, identifiable intangible assets are required to be measured at fair value and these acquired assets could include assets that are not intended to be used or sold or that are intended to be used in a manner other than their highest and best use. For purposes of these consolidated financial statements, it is assumed that all assets will be used in a manner that represents the highest and best of those assets, but it is not assumed that any market synergies will be achieved. The fair value of identifiable assets is determined primarily using the "income method," which starts with a forecast of all expected future cash flows. Some of the more significant assumptions inherent in the development of intangible asset values, from the perspective of a market participant, include: the amount and timing of projected future cash flows (including net revenue, cost of product sales, research and development costs, sales and marketing expenses, income tax expense, capital expenditures and working capital requirements) as well as estimated contributory asset charges; the discount rate selected to measure the risks inherent in the future cash flows; and the assessment of the asset's life cycle and the competitive trends impacting the asset, among other factors. The consolidated financial statements include estimated identifiable intangible assets representing core technology intangibles valued at $67.4 million, and in-process research and development ("IPR&D") intangibles valued at $54.6 million. The core technology intangible assets represent developed technology of products approved for sales in the market, which we refer to as marketed products, and have a finite useful lives. They are amortized on a straight-line basis over a weighted average of 7 years. These estimates will be adjusted accordingly if the final identifiable intangible asset valuation generates results, including corresponding useful lives and related amortization methods, which differ from the pro forma estimates, or if the above scope of intangible assets is modified. The IPR&D are considered indefinite-lived intangible assets until the completion of abandonment of the associated research and development efforts. Accordingly, during the development period, these assets are not amortized but subject to an annual impairment review. The final valuation is expected to be completed within 12 months from the completion of the acquisition.

[6]

Goodwill is calculated as the difference between the acquisition date fair value of the consideration expected to be transferred and the values assigned to the assets acquired. Goodwill is not amortized but tested for impairment on an annual basis or when indications for impairment exist.