EXHIBIT 32.1
CERTIFICATION
OF
CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of Manhattan Pharmaceuticals, Inc. do hereby certify that, to the best of their knowledge:
(a) the Quarterly Report on Form 10-Q/A of Manhattan Pharmaceuticals, Inc. for the quarter ended March 31, 2008 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Manhattan Pharmaceuticals, Inc.
| /s/ Douglas Abel | |
| Douglas Abel | |
| President and Chief Executive Officer | |
| Dated: September 3, 2008 | /s/ Michael G. McGuinness |
| Michael G. McGuinness | |
| Chief Operating and Financial Officer |