**Exhibit
      31.1**





**CERTIFICATION**





I,
      Robert
      Kaminski, certify that:





I
      have
      reviewed this annual report on Form 10-K of Leiner Health Products
      Inc.




Based
      on
      my knowledge, this 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;





Based
      on
      my knowledge, the financial statements, and other financial information included
      in this report, fairly present in all material respects the financial condition,
      results of operations and cash flows of Leiner Health Products Inc. as of,
      and
      for, the periods presented in this report;





Leiner
      Health Products Inc.’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 Leiner
      Health Products Inc. 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 Leiner Health Products Inc., 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 Leiner Health Products Inc.’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 Leiner Health Products Inc.’s internal control over
      financial reporting that occurred during Leiner Health Products Inc.’s most
      recent fiscal quarter that has materially affected, or is reasonably likely
      to
      materially affect, Leiner Health Products Inc.’s internal control over financial
      reporting; and





Leiner
      Health Products Inc.’s other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting, to
      Leiner Health Products Inc.’s auditors and the audit committee of Leiner Health
      Products Inc.’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 Leiner Health Products Inc.’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 Leiner Health Products Inc.’s internal controls over
      financial reporting.




Dated:
                June 23, 2006/s/
                Robert KaminskiRobert
                KaminskiChief
                Executive Officer