CONTACT:
Acura Pharmaceuticals, Inc.
Peter A. Clemens, SVP Investor Relations & CFO
(847-705-7709)
FOR IMMEDIATE RELEASE

ACURA PHARMACEUTICALS, INC.
ANNOUNCES ISSUANCE OF U.S. PATENT FOR DETERRING ABUSE OF OPIOID CONTAINING
DOSAGE FORMS
Palatine, IL, April 16, 2007: Acura
Pharmaceuticals, Inc. (OTC.BB-ACUR), today announced receipt from the
United States Patent and Trademark Office (the “USPTO”) of U.S. Patent
No. 7,201,920 titled ”Methods and Compositions for Deterring Abuse of
Opioid Containing Dosage Forms”. This issued patent was the subject of
the USPTO’s Notice of Allowance dated December 11, 2006 previously
disclosed by the Company. The allowed patent claims encompass pharmaceutical compositions intended to reduce or discourage the three
most common methods of prescription opioid analgesic product misuse and
abuse (the Company's "Aversion® Technology") including; (i) intravenous
injection of dissolved tablets or capsules; (ii) snorting of crushed
tablets or capsules and; (iii) intentionally swallowing excess
quantities of tablets or capsules. The opioid analgesics in the allowed
patent claims include oxycodone, hydrocodone, hydromorphone, morphine,
codeine, tramadol, propoxyphene and many others. At present, the
Company retains ownership of all intellectual property and commercial
rights to its Aversion® Technology and related product candidates.
In
addition to the issued patent (described above), the Company has pending
five U.S. non-provisional patent applications, two published WO patent
applications, one WO patent application pending publication, and
multiple additional U.S. provisional and international patent filings
relating to compositions containing opioid analgesics and other
abuseable drugs.
About Acura Pharmaceuticals, Inc.
Acura Pharmaceuticals, Inc., is a specialty pharmaceutical company
engaged in research, development and manufacture of innovative Aversion®
(abuse deterrent) Technology and related product candidates.
Forward
Looking Statements
This
press release contains "forward-looking statements" as defined in the
Private Securities Litigation Reform Act of 1995. These statements are
based on current expectations of future events. If underlying
assumptions prove inaccurate or unknown risks or uncertainties
materialize, actual results could vary materially from the Company’s
expectations and projections. The most significant of such risks and
uncertainties include, but are not limited to, the Company’s ability to
secure additional financing to fund continued product development and
operations, the Company’s ability to enter into contractual arrangements
with qualified pharmaceutical partners to license, develop and
commercialize the Company’s technology and product candidates, the
Company’s ability to avoid infringement of patents, trademarks and other
proprietary rights or trade secrets of third parties, and the Company’s
ability to fulfill the FDA’s requirements for approving the Company’s
product candidates for commercial distribution in the United States,
including, without limitation, the adequacy of the results of the
clinical studies completed to date and the results of other clinical
studies, to support FDA approval of the Company’s product candidates,
the adequacy of the development program for the Company’s product
candidates, changes in regulatory requirements, adverse safety findings
relating to the Company’s product candidates, the risk that the FDA may
not agree with the Company’s analysis of its clinical studies and may
evaluate the results of these studies by different methods or conclude
that the results of the studies are not statistically significant,
clinically meaningful or that there were human errors in the conduct of
the studies or otherwise, the risk that further studies of the Company’s
product candidates are not positive, and the uncertainties inherent in
scientific research, drug development, clinical trials and the
regulatory approval process. You are encouraged to review other
important risk factors relating to the Company on our web site at
www.acurapharm.com under
the link, “Company Risk Factors” and detailed in Company filings with
the Securities and Exchange Commission. The Company is at development
stage and may never have any products or technologies that generate
revenue. Acura Pharmaceuticals, Inc. assumes no obligation to update
any forward-looking statements as a result of new information or future
events or developments.

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