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  <p style="border:none;color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;padding:0in;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">&nbsp;</font></b></p>
  
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  <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;text-align:center;"><b><font size="5" color="black" face="Times New Roman" style="color:windowtext;font-size:18.0pt;">UNITED STATES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
  
  <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">Washington, D.C. 20549</font></b></p>
  
  <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">&nbsp;</font></b></p>
  
  <h2 align="center" style="font-weight:bold;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;">FORM&nbsp;8-K</font></b></h2>
  
  <h2 align="center" style="font-weight:bold;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></h2>
  
  <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="3" color="black" face="Times New Roman" style="color:windowtext;font-size:12.0pt;">CURRENT REPORT</font></b></p>
  
  <h2 align="center" style="font-weight:bold;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;">Pursuant to Section&nbsp;13 or 15(d)&nbsp;of</font></b></h2>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">the Securities Exchange Act of 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report
  (Date of earliest event reported): <b>&#160;May&nbsp;6, 2008</b></font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SONUS PHARMACEUTICALS, INC.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of
  Registrant as Specified in Its Charter)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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    <p align="center" style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">Delaware</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">000-21243</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:1.0pt;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="color:black;font-weight:bold;line-height:normal;margin:0in 0in .0001pt;page-break-after:auto;text-align:center;"><b><font size="2" color="black" face="Times New Roman" style="color:windowtext;font-size:10.0pt;">95-4343413</font></b></p>
    </td>
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    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other jurisdiction</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer</font></p>
    </td>
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    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">of incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Identification No)</font></p>
    </td>
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1522 217th Place S.E., Bothell, Washington 98021</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices)</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(425) 487-9500</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s telephone number, including area code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Not Applicable</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former name or former address, if changed since last report)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K
  filing is intended to simultaneously satisfy the filing obligation of the
  registrant under any of the following provisions:</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="99%" style="border-collapse:collapse;width:99.76%;">
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    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Written communications pursuant to Rule&nbsp;425
    under the Securities Act (17 CFR 230.425) </font></p>
    </td>
   </tr>
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    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
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    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Soliciting material pursuant to Rule&nbsp;14a-12
    under the Exchange Act (17 CFR 240.14a-12)</font></p>
    </td>
   </tr>
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    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under
    the Exchange Act (17 CFR 240.14d-2(b))</font></p>
    </td>
   </tr>
   <tr>
    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
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    <td width="29" valign="top" style="padding:0in .5pt 0in .5pt;width:21.55pt;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="691" valign="top" style="padding:0in .5pt 0in .5pt;width:518.15pt;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under
    the Exchange Act (17 CFR 240.13e-4(c)) </font></p>
    </td>
   </tr>
  </table>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\jgafar\08-13872-1\task2926472\13872-1-ba.htm',USER='105170',CD='May  9 05:32 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 3.01</font></b><b><font size="1" style="font-size:3.0pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Notice of Delisting or Failure to Satisfy a Continued Listing Rule&nbsp;or
  Standard; Transfer of Listing</font></b></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On
  November&nbsp;7, 2007, the Company reported on Form&nbsp;8-K that it had
  received a notice from The NASDAQ Stock Market (&#147;NASDAQ&#148;) indicating that it did
  not comply with the minimum $1.00 per share bid price requirement for continued
  inclusion under Marketplace Rule&nbsp;4450(a)(5)&nbsp;(the &#147;Rule&#148;). Therefore,
  in accordance with Marketplace Rule&nbsp;4450(e)(2), the Company was told that
  it had 180 calendar days, or until May&nbsp;5, 2008, to regain compliance.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
  Company has not regained compliance with the Rule.&#160; As a result, on May&nbsp;6, 2008, the Company
  received a determination letter from NASDAQ stating that its common stock would
  be delisted unless the Company appeals the delisting determination.&#160; The Company intends to appeal NASDAQ&#146;s
  determination to delist its common stock to a NASDAQ Listing Qualifications
  Panel.&#160; There is no assurance that a
  Nasdaq Listing Qualifications Panel will grant the Company&#146;s request for
  continued listing.&#160; During the appeal
  process, the Company&#146;s common stock will continue to trade on The Nasdaq Global
  Market.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Company issued a press release on May&nbsp;9,
  2008 regarding the determination letter that it received from NASDAQ.&#160; A copy of the press release is attached
  hereto as Exhibit&nbsp;99.1 and is incorporated by reference herein.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
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    <td width="8%" valign="top" style="padding:0in .7pt 0in .7pt;width:8.02%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item
    9.01</font></b></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:5.98%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in .7pt 0in .7pt;width:86.0%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Financial
    Statements and Exhibits.</font></b></p>
    </td>
   </tr>
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    <td width="8%" valign="top" style="padding:0in .7pt 0in .7pt;width:8.02%;">
    <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:5.98%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in .7pt 0in .7pt;width:86.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
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    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)</font></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:5.98%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in .7pt 0in .7pt;width:86.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Exhibits.</font></p>
    </td>
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    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:5.98%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in .7pt 0in .7pt;width:86.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
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    <td width="8%" valign="top" style="padding:0in .7pt 0in .7pt;width:8.02%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:5.98%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in .7pt 0in .7pt;width:86.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Exhibit&nbsp;99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Press
    release issued by Sonus Pharmaceuticals,&nbsp;Inc. on May&nbsp;9, 2008.</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant
  to the requirements of the Securities Exchange Act of 1934, the registrant has
  duly caused this report to be signed on its behalf by the undersigned hereunto
  duly authorized.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="50%" colspan="2" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SONUS PHARMACEUTICALS, INC.</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in .7pt 0in .7pt;width:5.54%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="44%" valign="top" style="padding:0in .7pt 0in .7pt;width:44.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in .7pt 0in .7pt;width:5.54%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="44%" valign="top" style="padding:0in .7pt 0in .7pt;width:44.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date:
    May&nbsp;9, 2008</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in .7pt 0in .7pt;width:5.54%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
    </td>
    <td width="44%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:44.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/
    Alan Fuhrman</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in .7pt 0in .7pt;width:5.54%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="44%" valign="top" style="border:none;padding:0in .7pt 0in .7pt;width:44.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Alan
    Fuhrman</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in .7pt 0in .7pt;width:50.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in .7pt 0in .7pt;width:5.54%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="44%" valign="top" style="padding:0in .7pt 0in .7pt;width:44.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Senior
    Vice President and Chief Financial Officer</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>
  
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  </div>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Exhibit&nbsp;Index</font></b></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="10%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:10.1%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit&nbsp;No.</font></b></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:4.44%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="85%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:85.46%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="top" style="border:none;padding:0in .7pt 0in .7pt;width:10.1%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:4.44%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="85%" valign="top" style="border:none;padding:0in .7pt 0in .7pt;width:85.46%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press
    release issued by Sonus Pharmaceuticals,&nbsp;Inc. on May&nbsp;9, 2008.</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4</font></p>
  
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metadata_filer: {"company-data": {"conformed-name": "SONUS PHARMACEUTICALS INC", "cik": "0000949858", "assigned-sic": "2835", "irs-number": "954343413", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-21243", "film-number": "08816030"}, "business-address": {"street1": "1522 217TH PLACE S.E.", "city": "BOTHELL", "state": "WA", "zip": "98021", "phone": "4254879500"}, "mail-address": {"street1": "1522 217TH PLACE S.E.", "city": "BOTHELL", "state": "WA", "zip": "98021"}}
text: UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  Washington, D.C. 20549
  FORM 8-K
  CURRENT REPORT
  Pursuant to Section 13 or 15(d) of
  the Securities Exchange Act of 1934
  Date of Report
  (Date of earliest event reported):
  May 6, 2008
  SONUS PHARMACEUTICALS, INC.
  (Exact name of
  Registrant as Specified in Its Charter)
  Delaware
  000-21243
  95-4343413
  (State or other jurisdiction
  (Commission
  (IRS Employer
  of incorporation)
  File Number)
  Identification No)
  1522 217th Place S.E., Bothell, Washington 98021
  (Address of principal executive offices)
  (425) 487-9500
  (Registrant's telephone number, including area code)
  Not Applicable
  (Former name or former address, if changed since last report)
  Check the appropriate box below if the Form 8-K
  filing is intended to simultaneously satisfy the filing obligation of the
  registrant under any of the following provisions:
  o
  Written communications pursuant to Rule 425
    under the Securities Act (17 CFR 230.425)
  o
  Soliciting material pursuant to Rule 14a-12
    under the Exchange Act (17 CFR 240.14a-12)
  o
  Pre-commencement communications pursuant to Rule 14d-2(b) under
    the Exchange Act (17 CFR 240.14d-2(b))
  o
  Pre-commencement communications pursuant to Rule 13e-4(c) under
    the Exchange Act (17 CFR 240.13e-4(c))
  Item 3.01
  Notice of Delisting or Failure to Satisfy a Continued Listing Rule or
  Standard; Transfer of Listing
  On
  November 7, 2007, the Company reported on Form 8-K that it had
  received a notice from The NASDAQ Stock Market ("NASDAQ") indicating that it did
  not comply with the minimum $1.00 per share bid price requirement for continued
  inclusion under Marketplace Rule 4450(a)(5) (the "Rule"). Therefore,
  in accordance with Marketplace Rule 4450(e)(2), the Company was told that
  it had 180 calendar days, or until May 5, 2008, to regain compliance.
  The
  Company has not regained compliance with the Rule.  As a result, on May 6, 2008, the Company
  received a determination letter from NASDAQ stating that its common stock would
  be delisted unless the Company appeals the delisting determination.  The Company intends to appeal NASDAQ's
  determination to delist its common stock to a NASDAQ Listing Qualifications
  Panel.  There is no assurance that a
  Nasdaq Listing Qualifications Panel will grant the Company's request for
  continued listing.  During the appeal
  process, the Company's common stock will continue to trade on The Nasdaq Global
  Market.
  The Company issued a press release on May 9,
  2008 regarding the determination letter that it received from NASDAQ.  A copy of the press release is attached
  hereto as Exhibit 99.1 and is incorporated by reference herein.
  Item
    9.01
  Financial
    Statements and Exhibits.
  (d)
  Exhibits.
  Exhibit 99.1       Press
    release issued by Sonus Pharmaceuticals, Inc. on May 9, 2008.
  2
  SIGNATURES
  Pursuant
  to the requirements of the Securities Exchange Act of 1934, the registrant has
  duly caused this report to be signed on its behalf by the undersigned hereunto
  duly authorized.
  SONUS PHARMACEUTICALS, INC.
  Date:
    May 9, 2008
  By:
  /s/
    Alan Fuhrman
  Alan
    Fuhrman
  Senior
    Vice President and Chief Financial Officer
  3
  Exhibit Index
  Exhibit No.
  Description
  99.1
  Press
    release issued by Sonus Pharmaceuticals, Inc. on May 9, 2008.
  4