FDA Advisory Committee Recommends Approval of HETLIOZ for the Treatment of Non-24-Hour-Disorder (Non-24) in the Totally Blind HETLIOZ is the First Potential Treatment to be Reviewed by the FDA for Non-24 WASHINGTON

FDA Advisory Committee Recommends Approval of HETLIOZ for the Treatment of Non-24-Hour-Disorder (Non-24) in the Totally Blind

HETLIOZ is the First Potential Treatment to be Reviewed by the FDA for Non-24

WASHINGTON, November 14, 2013 Vanda Pharmaceuticals Inc. (VANDA) (NASDAQ: VNDA) announced today that the U.S. Food and Drug

Administration s (FDA) Peripheral and Central Nervous System Drugs Advisory Committee (Advisory Committee) voted overwhelmingly to recommend the approval of Vanda s New Drug Application (NDA) for tasimelteon, proposed tradename

HETLIOZ , for the treatment of Non-24-Hour Disorder (Non-24) in the totally blind.

The advisory panel found that:

We are extremely pleased that

the FDA s advisory committee has recommended that the FDA approve HETLIOZ for the treatment of Non-24 in the totally blind, said Mihael H. Polymeropoulos M.D., Vanda s President and Chief Executive Officer. We are now one

step closer toward our goal of providing a treatment option that addresses the physiologic cause of this serious, debilitating orphan condition that impacts a majority of totally blind individuals.

Vanda s tasimelteon NDA is currently under Priority Review by the FDA for the treatment of Non-24 in the totally blind, with an action target date under

the Prescription Drug User Fee Act (PDUFA-V) of January 31, 2014.

The FDA grants Priority Review status for a drug that treats a serious

condition and, if approved, would provide a significant improvement in safety or effectiveness over current therapies. Currently, there is no approved treatment for Non-24 and HETLIOZ has the potential to address this unmet medical need.

About Non-24-Hour Disorder

serious, rare, and chronic circadian rhythm disorder characterized by the inability to entrain (synchronize) the master body clock with the 24-hour day-night cycle. Non-24 affects a majority of totally blind individuals, or between 65,000 and 95,000

people in the U.S. Non-24 occurs almost entirely in individuals who lack the light sensitivity necessary to entrain the master body clock in the brain with the 24-hour day-night cycle. Most people have a master body clock that naturally runs longer

than 24-hours and light is the primary environmental cue that resets it to 24 hours each day. Individuals with Non-24 have a master body clock that is not reset, and continually delays, resulting in prolonged periods of misalignment between their

circadian rhythms and the 24-hour day-night cycle, including the timing of melatonin and cortisol secretion. As a result of this misalignment, Non-24 is associated with significant disruption of the sleep-wake cycle and impairments in social and

occupational functioning, and marked subjective distress. Currently there is no approved treatment for Non-24. For more information on Non-24, please visit www.Non-24.com.

Tasimelteon, proposed tradename HETLIOZ , is a circadian regulator in development for the treatment of Non-24. Tasimelteon is a dual melatonin receptor

agonist (DMRA) with selective agonist activity at the MT1 and MT2 receptors. Tasimelteon aims to reset the master body clock in the suprachiasmatic nucleus (SCN), resulting in the entrainment of the body s melatonin and cortisol rhythms to

align to the 24-hour day-night cycle. The patent claiming Tasimelteon as a new chemical entity extends through December 2022, assuming a 5-year extension to be granted under the Hatch-Waxman Act. Tasimelteon has been granted orphan drug designation

for the treatment of Non-24 from both the U.S. and the European Union. Tasimelteon has not been approved by the FDA or any other regulatory authority.

About Vanda Pharmaceuticals Inc.

Pharmaceuticals Inc. is a biopharmaceutical company focused on the development and commercialization of products for the treatment of central nervous system disorders. For more on Vanda, please visit http://www.vandapharma.com.

Senior Vice President and Chief Financial Officer

Pharmaceuticals Inc.

Assistant Vice President

CAUTIONARY NOTE REGARDING

FORWARD LOOKING STATEMENTS

Various statements in this release are forward-looking statements under the securities laws. Words such as,

but not limited to, believe, expect, anticipate, estimate, intend, plan, project, target, goal, likely, will,

would, and could, or the negative of these terms and similar expressions or words, identify forward-looking statements. Forward-looking statements are based upon current expectations that involve risks, changes in

circumstances, assumptions and uncertainties. Important factors that could cause actual results to differ materially from those reflected in the company s forward-looking statements include, among others: the FDA not following the Advisory

Committee s recommendation, Vanda s failure to obtain, or any delay in

obtaining, regulatory approval for tasimelteon for the treatment of Non-24-Hour Disorder or to comply with ongoing regulatory requirements and other factors that are described in the Risk

Factors and Management s Discussion and Analysis of Financial Condition and Results of Operations sections of Vanda s annual report on Form 10-K for the fiscal year ended December 31, 2012 and quarterly report on

Form 10-Q for the quarter ended September 30, 2013, which are on file with the SEC and available on the SEC s website at www.sec.gov. In addition to the risks described above and in Vanda s annual report on Form 10-K and

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