**EXHIBIT
31.1**
 
 **CERTIFICATION
PURSUANT TO RULE 13a-14(a)/15d-14(a)**
 **OF
THE SECURITIES EXCHANGE ACT OF 1934**
 
 I, Fred
Wilkinson, certify that:
  1.
    I have reviewed this quarterly report on Form 10-Q
      of Columbia Laboratories, Inc. (the "Registrant");  2.
    Based
      on my knowledge, this quarterly report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements made, in light of the circumstances under which such
      statements were made, not misleading with respect to the period covered by
      this report;
 
 3.
    Based
      on my knowledge, the financial statements, and other financial information
      included in this quarterly report, fairly present in all material respects
      the financial condition, results of operations and cash flows of the
      Registrant as of, and for, the periods presented in this report;
 
 4.
    The
      Registrant's other certifying officer and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
      control over financial reporting (as defined in Exchange Act
      Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:
 
 (a)  Designed
such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material
information relating to the Registrant, including its consolidated subsidiaries,
is made known to us by others within those entities, particularly during the
period in which this report is being prepared;
 
 (b)  Designed
such internal control over financial reporting, or caused such internal control
over financial reporting to be designed under our supervision, to provide
reasonable assurance regarding the reliability of financial reporting and the
preparation of financial statements for external purposes in accordance with
generally accepted accounting principles;
 
 (c)  Evaluated
the effectiveness of the Registrant's disclosure controls and procedures and
presented in this report our 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
 
 d)  Disclosed
in this report any change in the Registrant's internal control over financial
reporting that occurred during the Registrant's most recent fiscal quarter (the
Registrant's fourth fiscal quarter in the case of an annual report) that has
materially affected, or is reasonably likely to materially affect, the
Registrant's internal control over financial reporting; and
 
 5.
    The
      Registrant's other certifying officer and I have disclosed, based on our
      most recent evaluation of internal control over financial reporting, to
      the Registrant's auditors and the audit committee of the Registrant's
      board of directors (or persons performing the equivalent functions):
 
 (a)  All
significant deficiencies and material weaknesses in the design or operation of
internal control over financial reporting which are reasonably likely to
adversely affect the Registrant's ability to record, process, summarize and
report financial information; and
 
 (b)  Any
fraud, whether or not material, that involves management or other employees who
have a significant role in the Registrant's internal control over financial
reporting.
 
 Date: May
10, 2005
 
 /s/
      Fred Wilkinson
      Fred
      Wilkinson
      Chief
      Executive Officer