**Exhibit 31.2****CERTIFICATION**I, Kevin P. McDonnell, 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 omitto state a material fact necessary to make the statements made, in light of the circumstances underwhich 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 thisreport, fairly present in all material respects the financial condition, results of operations andcash 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 andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules13a-15(f) and 15d-15(f)) for Leiner Health Products Inc. and have:(e) Designed such disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that material information relatingto Leiner Health Products Inc., including its consolidated subsidiaries, is made known to us byothers within those entities, particularly during the period in which this report is beingprepared;(f) Designed such internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation of financial statementsfor external purposes in accordance with generally accepted accounting principles;(g) Evaluated the effectiveness of Leiner Health Products Inc.’s disclosure controls andprocedures and presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by this report based onsuch evaluation; and(h) Disclosed in this report any change in Leiner Health Products Inc.’s internal control overfinancial reporting that occurred during Leiner Health Products Inc.’s most recent fiscalquarter that has materially affected, or is reasonably likely to materially affect, LeinerHealth Products Inc.’s internal control over financial reporting; andLeiner Health Products Inc.’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to Leiner Health Products Inc.’sauditors and the audit committee of Leiner Health Products Inc.’s board of directors (or personsperforming the equivalent functions):(a) All significant deficiencies and material weaknesses in the design or operation of internalcontrol over financial reporting which are reasonably likely to adversely affect Leiner HealthProducts 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 asignificant role in Leiner Health Products Inc.’s internal controls over financial reporting.Date:June 29, 2007   /s/ Kevin P. McDonnell   Kevin P. McDonnell Executive Vice President and Chief Financial Officer