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Exhibit 12.1

CERTIFICATION

I, Elie Farah, Chief Executive Officer of Merus Labs International
  Inc., certify that:

|1. | I have reviewed this annual report on Form 20-F of Merus
        Labs International Inc.;                                                                                                                                                                                                                                                                     
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|2. | 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;                    
|   |                                                                                                                                                                                                                                                                                                                                                               
|3. | 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 the company as of, and for, the periods presented in this
        report;                                          
|   |                                                                                                                                                                                                                                                                                                                                                               
|4. | The company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 l5d-l5(e)) and internal
        control over financial reporting (as defined in Exchange Act Rules 13a-15(f)
        and 15d-15(f)) for the company 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 company,
        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;
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| |     |                                                                                                                                                                                                                                                                                                                                                                                                                    
| | (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 company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 companys
        internal control over financial reporting that occurred during the period
        covered by the annual report that has materially affected, or is reasonably
        likely to materially affect, the companys internal control over
        financial reporting; and                                                                               

|5. | The companys other certifying officer and I have
        disclosed, based on our most recent evaluation of internal control over
        financial reporting, to the companys auditors and the audit committee
        of the companys board of directors (or persons performing the equivalent
        functions):
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| | (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 companys ability
        to record, process, summarize and report financial information; and
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| |     |                                                                                                                                                                                                                                                                                               
| | (b) | Any fraud, whether or not material, that involves management
        or other employees who have a significant role in the companys internal
        control over financial reporting.                                                                                                       

|                       | MERUS LABS INTERNATIONAL INC.               
|---------------------- | --------------------------------------------
|                       |                                             
|Date: January 2,  2013 | /s/ ELIE FARAH                              
|                       | Name:       Elie
      Farah                
|                       | Title:         Chief
      Executive Officer

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