UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13G/A

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 3)*

                       INTRABIOTICS PHARMACEUTICALS, INC.
                       ----------------------------------
                                (Name of Issuer)

                         Common Stock, $0.001 par value
                         ------------------------------
                         (Title of Class of Securities)

                                    46116T506
                                    ---------
                                 (CUSIP Number)

                                December 31, 2005
                                -----------------
             (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [X] Rule 13d-1(b)
                                [ ] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                          Continued on following pages
                                Page 1 of 9 Pages


CUSIP No. 46116T506                                          Page 2 of 9 Pages

1        Names of Reporting Persons
         I.R.S. Identification Nos. of above persons (entities only)

                  PERRY CORP.

2        Check the Appropriate Box If a Member of a Group (See Instructions)
                  a. [ ]
                  b. [ ]

3        SEC Use Only

4        Citizenship or Place of Organization

                  NEW YORK

                      5     Sole Voting Power
Number of                          425,000
  Shares
Beneficially          6     Shared Voting Power
  Owned By                         0
    Each
Reporting             7     Sole Dispositive Power
    Person                         425,000
    With
                      8     Shared Dispositive Power
                                   0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                            425,000

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares (See Instructions)

                            [ ]

11       Percent of Class Represented By Amount in Row (9)

                            4.5%

12       Type of Reporting Person (See Instructions)

                            IA, CO

CUSIP No. 46116T506                                          Page 3 of 9 Pages

1        Names of Reporting Persons
         I.R.S. Identification Nos. of above persons (entities only)

                  RICHARD C. PERRY

2        Check the Appropriate Box If a Member of a Group (See Instructions)
                  a. [ ]
                  b. [ ]

3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                      5     Sole Voting Power
Number of                          425,000
  Shares
Beneficially          6     Shared Voting Power
  Owned By                         0
    Each
Reporting             7     Sole Dispositive Power
    Person                         425,000
    With
                      8     Shared Dispositive Power
                                   0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                            425,000

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares (See Instructions)

                            [ ]

11       Percent of Class Represented By Amount in Row (9)

                            4.5%

12       Type of Reporting Person (See Instructions)

                            IN, HC

                                                             Page 4 of 9 Pages
Item 1(a)         Name of Issuer:

                  Intrabiotics Pharmaceuticals, Inc. (the "Issuer").

Item 1(b)         Address of the Issuer's Principal Executive Offices:

                  1009 Oak Hill Road, Suite 201, Lafayette, California 94549.

Item 2(a)         Name of Person Filing:

                  This statement is filed on behalf of each of the following
persons (collectively, the "Reporting Persons"):

                  i)  Perry Corp.; and

                  ii) Richard C. Perry, in his capacities as the President and
                      sole stockholder of Perry Corp. ("Mr. Perry").

                  This statement relates to Shares (as defined herein) held for
the accounts of two or more private investment funds for which Perry Corp. acts
as general partner and/or managing member of the general partner and/or
investment adviser.

Item 2(b)         Address of Principal Business Office or, if None, Residence:

                  The address of the principal  business  office of each of the
Reporting  Persons is 767 Fifth Avenue,  New York,  New York 10153.

Item 2(c)         Citizenship:

                  1)  Perry Corp. is a New York corporation; and

                  2)  Mr. Perry is a citizen of the United States.

Item 2(d)         Title of Class of Securities:

                  Common Stock, par value $0.001 per share (the "Shares").

Item 2(e)         CUSIP Number:

                  46116T506

Item 3.           If this statement is filed pursuant to Rule 13d-1(b), or 
                  13d-2(b) or (c), check whether the person filing is a:

                  i)  Perry Corp. is an investment adviser registered under 
                      Section 203 of the Investment Advisers Act of 1940.

                  ii) Mr. Perry is a control person of Perry Corp.

                                                             Page 5 of 9 Pages

Item 4.           Ownership:

Item 4(a)         Amount Beneficially Owned:

                  As of the Date of Event, each of the Reporting Persons may be
deemed to be the beneficial owner of 425,000 Shares. This number consists of (i)
325,000 Shares and (ii) 100,000 Shares issuable upon the exercise of warrants
held for the accounts of the private investment funds for which Perry Corp. acts
as general partner and/or managing member of the general partner and/or
investment adviser.

Item 4(b)         Percent of Class:

                  As of the Date of Event, the number of Shares outstanding was
9,271,401 according to the Issuer's Quarterly Report on Form 10-Q for the
quarter ended September 30, 2005 filed on October 27, 2005. As of the Date of
Event, each of the Reporting Persons may be deemed to be the beneficial owner of
approximately 4.5% of the total number of Shares outstanding.

Item 4(c)         Number of shares as to which such person has:

         Perry Corp.
         (i)   Sole power to vote or direct the vote                    425,000
         (ii)  Shared power to vote or to direct the vote                     0
         (iii) Sole power to dispose or to direct the disposition of    425,000
         (iv)  Shared power to dispose or to direct the disposition of        0

         Mr. Perry
         (i)   Sole power to vote or direct the vote                    425,000
         (ii)  Shared power to vote or to direct the vote                     0
         (iii) Sole power to dispose or to direct the disposition of    425,000
         (iv)  Shared power to dispose or to direct the disposition of        0

Item 5.           Ownership of Five Percent or Less of a Class:

                  If this statement is being filed to report the fact that as of
the date hereof the reporting person has ceased to be the beneficial owner of
more than five percent of the class of securities, check the following [X].

Item 6.           Ownership of More than Five Percent on Behalf of Another 
                  Person:

                  The limited partners of (or investors in) each of the private
investment funds for which Perry Corp. acts as general partner and/or managing
member of the general partner and/or investment adviser have the right to
participate in the receipt of dividends from, or proceeds from the sale of, the
securities held for the accounts of their respective funds in accordance with
their respective limited partnership interest (or investment percentages) in
their respective funds.

                                                             Page 6 of 9 Pages

Item 7.           Identification and Classification of the Subsidiary Which 
                  Acquired the Security Being Reported on by the Parent Holding
                  Company:

                  Perry Corp. is the relevant entity for which Mr. Perry may be
 considered a control person.

                  Perry Corp. is an investment adviser registered under the 
Investment Advisers Act of 1940.

Item 8.           Identification and Classification of Members of the Group:

                  This Item 8 is not applicable.

Item 9.           Notice of Dissolution of Group:

                  This Item 9 is not applicable.

Item 10. Certification:

                  By signing below each of the Reporting Persons certifies that,
to the best of such person's knowledge and belief, the securities referred to
above were acquired and are held in the ordinary course of business and were not
acquired and are not held for the purpose of or with the effect of changing or
influencing the control of the Issuer of such securities and were not acquired
and are not held in connection with or as a participant in any transaction
having such purpose or effect.


                                                             Page 7 of 9 Pages
                                   
                                   SIGNATURES


         After reasonable inquiry and to the best of my knowledge and belief,
the undersigned certifies that the information set forth in this statement is
true, complete and correct.


Date:    January 10, 2006                          PERRY CORP.


                                                   By: /s/Richard C. Perry
                                                   --------------------------
                                                       Name: Richard C. Perry
                                                       Title:President



Date:    January 10, 2006                          RICHARD C. PERRY


                                                   /s/ Richard C. Perry
                                                   --------------------------


                                                             Page 8 of 9 Pages 

                                  EXHIBIT INDEX
                                                                       Page No. 
                                                                       -------- 
                                                                              
A.  Joint Filing Agreement, dated as of January 10, 2006, by 
    and among the Reporting Persons..........................               9


                                                             Page 9 of 9 Pages

                                    EXHIBIT A

                             JOINT FILING AGREEMENT

         The undersigned hereby agree that the statement on Schedule 13G/A with
respect to the Common Stock, $0.001 par value, of Intrabiotics Pharmaceuticals,
Inc., dated as of January 10, 2006 , is, and any amendments thereto (including
amendments on Schedule 13D) signed by each of the undersigned shall be, filed on
behalf of each of us pursuant to and in accordance with the provisions of Rule
13d-1(k) under the Securities Exchange Act of 1934.


Date:    January 10, 2006                          PERRY CORP.


                                                   By: /s/Richard C. Perry
                                                   --------------------------
                                                       Name: Richard C. Perry
                                                       Title:President



Date:    January 10, 2006                          RICHARD C. PERRY


                                                   /s/ Richard C. Perry
                                                   --------------------------