Supernus Announces Pricing of Public Offering

Supernus Announces Pricing of Public Offering

ROCKVILLE, Md., Nov. 29, 2012 (GLOBE NEWSWIRE) -- Supernus Pharmaceuticals,
Inc. (Nasdaq:SUPN), a specialty pharmaceutical company announced the pricing
of the underwritten public offering of 6,000,000 shares of its common stock at
a price to the public of $8.00 per share. Supernus has granted the
underwriters a 30-day option to purchase up to 900,000 additional shares to
cover over-allotments, if any.

Jefferies & Company, Inc., Piper Jaffray & Co. and Cowen and Company, LLC are
acting as joint book-running managers for the offering. Stifel Nicolaus Weisel
and Lazard Capital Markets LLC are acting as co-managers.

A registration statement relating to these securities has been filed with, and
declared effective by, the Securities and Exchange Commission. This press
release shall not constitute an offer to sell or a solicitation of an offer to
buy, nor shall there be any sale of these securities in any state in which
such offer, solicitation or sale would be unlawful prior to registration or
qualification under the securities laws of such state.

This offering is being made only by means of a prospectus. Copies of the
preliminary prospectus or, when available, the final prospectus for this
offering, may be obtained from the offices of Jefferies & Company, Inc.,
Equity Syndicate Prospectus Department, at 520 Madison Avenue, New York, NY
10022, or by calling (877) 547-6340, or by emailing
Prospectus_Department@Jefferies.com; from Piper Jaffray & Co., Attention:
Prospectus Department, 800 Nicollet Mall, J12S03, Minneapolis, MN 55402, or by
telephone at 800-747-3924, or by email at prospectus@pjc.com; or from Cowen
and Company, LLC, c/o Broadridge Financial Services, 1155 Long Island Avenue,
Edgewood, NY 11717, Attention: Prospectus Department, or by telephone at (631)
274-2806, or by fax at (631) 254-7140.

About Supernus Pharmaceuticals, Inc.

Supernus Pharmaceuticals, Inc. is a specialty pharmaceutical company focused
on developing and commercializing products for the treatment of central
nervous system, or CNS, diseases. The company has one approved product for
epilepsy, Oxtellar XR™ (extended-release oxcarbazepine), and one tentatively
approved product for epilepsy, Trokendi XR™ (extended-release topiramate). The
company is also developing several product candidates in psychiatry to address
large market opportunities in ADHD, including ADHD patients with impulsive
aggression. These product candidates include SPN-810 for impulsive aggression
in ADHD and SPN-812 for ADHD.

CONTACT: Jack Khattar, President & CEO
         Gregory S. Patrick, Vice President and CFO
         Supernus Pharmaceuticals, Inc.
         Tel: (301) 838-2500