(PETX) Granted First FDA Approval

Galliprant for the Control of Pain and Inflammation Associated with Osteoarthritis in Dogs

KANSAS CITY, Kan., March 21, 2016  — Aratana Therapeutics, Inc. (NASDAQ: PETX), a pet therapeutics company focused on the licensing, development and commercialization of innovative biopharmaceutical products for companion animals, today announced the Food and Drug Administration’s Center for Veterinary Medicine (CVM) approved GALLIPRANT^® (grapiprant tablets) for the control of pain and inflammation associated with osteoarthritis in dogs. Galliprant is expected to be available to veterinarians in fall 2016.

“As the first approved product in the new piprant class, Galliprant offers veterinarians a needed therapeutic option for the millions of dogs treated each year for osteoarthritis,” explains Steven St. Peter, M.D., President and Chief Executive Officer of Aratana Therapeutics. “Clinical studies have shown Galliprant offers proven efficacy when compared to placebo and is well-tolerated in dogs.”

Galliprant is a prostaglandin E2 (PGE2) EP4 receptor antagonist (PRA), a non-cyclooxygenase inhibiting, non-steroidal and anti-inflammatory drug. Galliprant blocks PGE2-elicited pain and inflammation.

Important Safety Information
GALLIPRANT® (grapiprant tablets) is for use in dogs only. Do not use in dogs younger than 9 months of age and less than 8 lbs (3.6 kg), dogs used for breeding, or in pregnant or lactating dogs. Adverse reactions in dogs may include mild gastrointestinal effects including, vomiting, diarrhea and decreased appetite. Should not be used in dogs that have a hypersensitivity to grapiprant. Avoid use with COX-inhibiting NSAIDs or corticosteroids.

About Aratana Therapeutics
Aratana Therapeutics is a pet therapeutics company focused on licensing, developing and commercializing innovative pharmaceutical products for dogs and cats. Aratana believes that it can leverage the investment in the human pharmaceutical industry to bring therapeutics to pets in a capital and time efficient manner. The Company has multiple products approved by the Food and Drug Administration’s Center for Veterinary Medicine or licensed by the United States Department of Agriculture. The Company’s pipeline includes therapeutic candidates targeting pain, inappetence, cancer, viral diseases, allergy and other serious, unmet or underserved medical needs.  Aratana believes providing innovative options to veterinarians and pet owners will help manage pets’ medical needs safely and effectively, result in longer and improved quality of life for pets. For more information, please visit www.aratana.com.

Forward-Looking Statements Disclaimer
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact should be considered forward-looking statements, including without limitation statements with respect to our ability to bring several innovative products to market; expectations regarding the timing or scope of commercialization of Galliprant; and the Company’s plans and opportunities, including without limitation offering innovative therapeutics.

These forward-looking statements are based on management’s current expectations. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the following: our history of operating losses and expectations of losses for the foreseeable future; failure to obtain sufficient capital to fund our operations; risks relating to the impairment of intangible assets AT-004, AT-005, AT-007 and AT-011; effects of unstable market and economic conditions; restrictions placed on our operating and financial flexibility by the terms of our credit facility; our substantial dependence on the success of certain of our product candidates; our dependence on novel technologies and compliance with complex regulatory requirements; our inability to obtain regulatory approval for our existing or future product candidates; the lack of commercial success of our current or future product candidates; our inability to realize all of the anticipated benefits of our acquisitions and difficulty integrating acquired businesses; the uncertainty of outcomes of the development of pet therapeutics, which is a lengthy and expensive process; effects of competition; our inability to identify, license, develop and commercialize additional product candidates; our failure to attract and keep senior management and key scientific personnel; our reliance on third-party manufacturers, suppliers, and partners; regulatory restrictions on the marketing of our product candidates; unanticipated difficulties or challenges in the relatively new field of biologics development and manufacturing;  our small commercial organization; difficulties managing the growth of our organization; our significant costs of operating as a public company; risks related to the restatement of our financial statements for the year ended December 31, 2013 and the identification of a material weakness in our internal control over financial reporting; changes in distribution channels for pet therapeutics; consolidation of our customers; limitations on our ability to use our net operating carryforwards; impact of generic products; unanticipated safety or efficacy concerns; our limited patents and patent rights; our failure to comply with our intellectual property license obligations; our infringement of third party patents and challenges to our patents or rights; litigation resulting from the misuse of our confidential information; the uncertainty of the regulatory approval process; our failure to comply with regulatory requirements or obtain foreign regulatory approvals; our failure to report adverse medical events related to our products; legislative or regulatory changes; the volatility of our stock price; our status as an “emerging growth company,” as defined in the JOBS Act; the potential for dilution if we sell shares of our common stock in future financings; the influence of significant stockholders over our business; and effects of anti-takeover provisions in our charter documents and under Delaware law. These and other important factors discussed under the caption “Risk Factors” in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission, or SEC, on March 15, 2016, along with our other reports filed with the SEC could cause actual results to differ materially from those indicated by the forward-looking statements made in this press release. Any such forward-looking statements represent management’s estimates as of the date of this press release. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

Contacts
For investor inquires:
Craig Tooman
ctooman@aratana.com
(913) 353-1026

For media inquiries:
Rachel Reiff
rreiff@aratana.com
(913) 353-1050