Exhibit 99.4

THERATECHNOLOGIES INC. Security Class Holder Account Number Form of Proxy - Annual Meeting of Shareholders to be held on May 16, 2012This Form of Proxy is solicited by and on behalf of Management. Notes to proxy1. Every holder has the right to appoint some other person or company of their choice, who need not be a holder, to attend and act on their behalf at the meeting, or at any adjournment thereof. If you wish to appoint a person or company other than the persons whose names are printed herein, please insert the name of your chosen proxy holder in the space provided (see reverse). 2. If the securities are registered in the name of more than one owner (for example, joint ownership, trustees, executors, etc.), then all those registered should sign this proxy. If you are voting on behalf of a corporation or another individual you may be required to provide documentation evidencing your power to sign this proxy with signing capacity stated.3. This proxy should be signed in the exact manner as the name appears on the proxy.4. If this proxy is not dated, it will be deemed to bear the date on which it is mailed by Management to the holder.5. The securities represented by this proxy will be voted as directed by the holder; however, if such a direction is not made in respect of any matter, this proxy will be voted as recommended by Management. 6. The securities represented by this proxy will be voted or withheld from voting, in accordance with the instructions of the holder, on any ballot that may be called for and, if the holder has specified a choice with respect to any matter to be acted on, the securities will be voted accordingly.7. This proxy confers discretionary authority in respect of amendments to matters identified in the Notice of Meeting or other matters that may properly come before the meeting.8. This proxy should be read in conjunction with the accompanying documentation provided by Management. Proxies submitted must be received prior to 5:00 p.m., Eastern Time, on May 14, 2012. ------- Fold -------Fold

Appointment of ProxyholderThe undersigned shareholder of Theratechnologies Inc. (the “Corporation”) hereby appoints: Paul Pommier, Chairman of the Board, orfailing him, John-Michel Huss, President and ChiefExecutive Officer ORPrint the name of the person you areappointing if this person is someoneother than the ManagementNominees listed herein.as my proxyholder to attend and act for and on my behalf at the Annual Meeting of Shareholders of the Corporation to be held at the Hotel Omni Mont-Royal, 1050 Sherbrooke Street West,Montreal, Québec, on Wednesday, May 16, 2012 at 10:00 a.m., (the “Meeting”), and at any adjournment thereof, with full power of substitution and with all the powers which the undersignedcould exercise with respect to his/her common shares if personally present at the Meeting. The shares are to be voted, on any ballot, in accordance with the instructions given below:VOTING RECOMMENDATIONS BY MANAGEMENT ARE INDICATED BY HIGHLIGHTED TEXT OVER THE BOXES. For Withhold 1. Election of Directors Fo WithholdVote FOR or WITHHOLD from voting with respect to the election of directors.2. Appointment of AuditorsVote FOR or WITHHOLD from voting with respect to the appointment of auditors. For Withhold Authorized Signature(s) - This section must be completed for your instructions to be executed. I authorize you to act in accordance with my instructions set out above. I hereby revoke any proxy previously given with respect to the Meeting. If no voting instructions are indicated above, this Proxy will be voted as recommended by Management. Signature(s) Date Interim Financial Statements - Mark this box if you would like to receive Interim Financial Statements and accompanying Management’s Discussion and Analysis by mail. Annual Report - Mark this box if you would like to receive the Annual Report and accompanying Management’s Discussion and Analysis by mail. If you are not mailing back your proxy, you may register online to receive the above financial report(s) by mail at www.computershare.com/mailinglist.