SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                         TETRAGENEX PHARMACEUTICALS, INC
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

     DELAWARE                                                         22-3781895
- ---------------------                                                 ----------
(STATE OR JURISDICTION OF INCORPORATION)                           (IRS EMPLOYER
                                                             IDENTIFICATION NO.)

1 MAYNARD DRIVE SUITE 205                                                  07656
PARK RIDGE, NEW JERSEY 07656
                                                                      (ZIP CODE)
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)

If this form relates to the               If this form relates to the
registration of a class of securities     registration of a class of securities
pursuant to Section 12(b) of the Exchange pursuant to Section 12(g) of the
Act and is effective pursuant to          Exchange Act and is effective pursuant
General Instruction A(c), please          to General Instruction A(d), please
check the following box. / /                         check the following box /X/

SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

TITLE OF EACH CLASS                              NAME OF EACH EXCHANGE ON WHICH
TO BE SO REGISTERED                              EACH CLASS IS TO BE REGISTERED
- -------------------                              ------------------------------

NONE


SECURITIES TO REGISTERED PURSUANT TO SECTION 12 (g) OF THE ACT:

TITLE OF EACH CLASS                              NAME OF EACH EXCHANGE ON WHICH
TO BE SO REGISTERED                              EACH CLASS IS TO BE REGISTERED
- -------------------                              ------------------------------

COMMON STOCK, PAR VALUE $0.001 PER SHARE         OVER THE COUNTER BULLETIN BOARD



Item 1.  Description of Registrant's Securities to be registered.
         --------------------------------------------------------

         Contemporaneously  with the filing of this  Registration  Statement  on
Form  8-A,  Tetragenex   Pharmaceuticals,   Inc  (the  "Company")  is  filing  a
Registration  Statement  including  32,468,132 shares of common stock, par value
$0.001  per  share,   which  offering  is  being   conducted   pursuant  to  the
Pre-Effective  Amendment No. 2 to its Registration  Statement on Form SB-2 (File
No. 333-134987),  of which the Company's prospectus to be filed pursuant to Rule
424(b) forms a part,  and which  Registration  Statement and prospectus are each
incorporated herein by reference.

         For  an  additional  discussion  of  the  Company's  securities  to  be
registered,  see  the  section  entitled  "DESCRIPTION  OF  SECURITIES"  in  the
Company's aforementioned Registration Statement on Form SB-2.

Item 2.  Exhibits.
         --------

Filed as  Exhibits  to the  Registrant's  Pre-Effective  Amendment  No. 2 to the
Registration  Statement  on Form SB-2 (File No.  333-134987),  as  amended,  and
incorporated herein by reference.

2.1         Final order of the bankruptcy of Innapharma, Inc.
3.1.1       Amended and Restated Certificate of Incorporation of Tetragenex
            Pharmaceuticals, Inc.
3.1.2       Amended and Restated By-laws of Tetragenex Pharmaceuticals, Inc.
3.2         Certificate of Authority to do business in the State of New Jersey
            of Tetragenex Pharmaceuticals, Inc.
3.2.1       Certificate of Correction of Certificate of Merger
4.1         Promissory Note
5.1         Opinion of Gersten Savage LLP.
10.1        Employment Agreement with Martin Schacker dated October 28, 1999,
            as amended
14          Code of Ethics
16          Letter from Former Auditor
23.1        Consent of Demetrius & Company, LLC
23.2        Consent of Gersten Savage, LLP (included in the opinion filed
            as Exhibit 5.1).
99.1        Patent Security Agreement

                                    SIGNATURE

         Pursuant  to the  requirements  of  Section  12 of the  Securities  and
Exchange Act of 1934, the Registrant has duly caused this registration statement
to be signed on its behalf by the undersigned, thereunto duly authorized.



Dated:   October 30, 2006

                                    TETRAGENEX PHARMACEUTICALS, INC.

                                    By: /s/ Martin F. Schacker
                                       -----------------------------------------
                                       Martin F. Schacker, Chairman of the Board