OPNT Opiant Pharmaceuticals Inc

OPNET Technologies, Inc. (Nasdaq:OPNT) will hold an investor conference call on Wednesday, November 3 at 5:00 pm Eastern Time to review financial results for the second quarter of fiscal 2011.

To listen to the OPNET investor conference call:

• Call 877-377-7550 in the U.S. or 408-337-0151 for international callers, or
• Use the webcast at www.opnet.com. Investors are advised to go to the web site at least 15 minutes early to register, download, and install any necessary audio software.

To listen to the archived call:

• Call the replay phone number at 800-642-1687 or 706-645-9291 for international callers. For replay, enter passcode # 16048831. The replay will be available from 8:00 pm Eastern Time Nov 3rd through 11:59 pm Eastern Time Nov 10th.
• The webcast will be available at www.opnet.com, archived for seven days.

The second quarter of fiscal 2011 financial results will be released after the market closes on Wednesday, November 3, 2010.

About OPNET Technologies, Inc.

Founded in 1986, OPNET Technologies, Inc. (Nasdaq:OPNT) is a leading provider of IT Service Assurance solutions. For more information about OPNET and its products, please visit www.opnet.com.

OPNET and OPNET Technologies, Inc. are trademarks of OPNET Technologies, Inc. All other trademarks are the property of their respective owners.

CONTACT:  OPNET Technologies, Inc.
          Media Contact:
          Susan S. Cole
            (919) 461-2445
            Media@opnet.com
          Investor Relations:
          Mel Wesley
            (240) 497-3000
            ir@opnet.com
          www.opnet.com