**Exhibit 31**

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**CERTIFICATIONS PURSUANTTO RULE 13a-14(A) OF THE EXCHANGE ACT**

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I,Louis R. Bucalo, M.D., Chairman, President and Chief Executive Officer of TitanPharmaceuticals, Inc., certify that:

 

1.               I have reviewed this quarterly report onForm 10-Q of Titan Pharmaceuticals, Inc.;

 

2.               Based on my knowledge, this quarterlyreport does not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading withrespect to the period covered by this quarterly report;

 

3.               Based on my knowledge, the financialstatements, and other financial information included in this quarterly report,fairly present in all material respects the financial condition, results ofoperations and cash flows of the registrant as of, and for, the periodspresented in this quarterly report;

 

4.               The registrant’s other certifyingofficer and I are responsible for establishing and maintaining disclosure controlsand procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) forthe registrant and have:

 

a)              designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to be designedunder our supervision, to ensure that material information relating to theregistrant, including its consolidated subsidiaries, is made known to us byothers within those entities, particularly during the period in which thisquarterly report is being prepared;

 

b)             evaluated the effectiveness of theregistrant’s disclosure controls and procedures and presented in this reportour conclusions about the effectiveness of the disclosure controls andprocedures, as of the end of the period covered by this report based on suchevaluation; and

 

c)              disclosed in this report any change inthe registrant’s internal control over financial reporting that occurred duringthe registrant’s most recent fiscal quarter that has materially affected, or isreasonably likely to materially affect, the registrant’s internal control overfinancial reporting; and

 

5.               The registrant’s other certifying officerand I have disclosed, based on our most recent evaluation of internal controlover financial reporting, to the registrant’s auditors and the audit committee ofregistrant’s board of directors:

 

a)              all significant deficiencies and materialweaknesses in the design or operation of internal control over financialreporting which are reasonably likely to adversely affect the registrant’sability to record, process, summarize and report financial information; and

 

b)             any fraud, whether or not material, thatinvolves management or other employees who have a significant role in theregistrant’s internal control over financial reporting.

 

 
| Date: August 6, 2004 | /s/ Louis R. Bucalo                             |   |
|---------------------------|-------------------------------------------------|--------|
|                      | Louis R. Bucalo, M.D.                           |
|                      | Chairman, President and Chief Executive Officer |

 

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**CERTIFICATIONS PURSUANT TO RULE 13a-14(A) OFTHE EXCHANGE ACT**

 

I, Robert E. Farrell, J.D., Executive Vice President and ChiefFinancial Officer of Titan Pharmaceuticals, Inc., certify that:

 

1.               I have reviewed this quarterly report onForm 10-Q of Titan Pharmaceuticals, Inc.;

 

2.               Based on my knowledge, this quarterlyreport does not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading withrespect to the period covered by this quarterly report;

 

3.               Based on my knowledge, the financialstatements, and other financial information included in this quarterly report,fairly present in all material respects the financial condition, results ofoperations and cash flows of the registrant as of, and for, the periodspresented in this quarterly report;

 

4.               The registrant’s other certifyingofficer and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the registrant and have:

 

a)              designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to be designedunder our supervision, to ensure that material information relating to theregistrant, including its consolidated subsidiaries, is made known to us byothers within those entities, particularly during the period in which thisquarterly report is being prepared;

 

b)             evaluated the effectiveness of theregistrant’s disclosure controls and procedures and presented in this reportour conclusions about the effectiveness of the disclosure controls and procedures,as of the end of the period covered by this report based on such evaluation;and

 

c)              disclosed in this report any change inthe registrant’s internal control over financial reporting that occurred duringthe registrant’s most recent fiscal quarter that has materially affected, or isreasonably likely to materially affect, the registrant’s internal control overfinancial reporting; and

 

5.               The registrant’s other certifying officerand I have disclosed, based on our most recent evaluation of internal controlover financial reporting, to the registrant’s auditors and the audit committeeof registrant’s board of directors:

 

a)              all significant deficiencies and materialweaknesses in the design or operation of internal control over financialreporting which are reasonably likely to adversely affect the registrant’sability to record, process, summarize and report financial information; and

 

b)             any fraud, whether or not material, thatinvolves management or other employees who have a significant role in theregistrant’s internal control over financial reporting.

 

 
| Date: August 6, 2004 | /s/ Robert E. Farrell                                |   |
|---------------------------|------------------------------------------------------|--------|
|                      | Robert E. Farrell, J.D.                              |
|                      | Executive Vice President and Chief Financial Officer |

 

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