Exhibit 99.27
 THERATECHNOLOGIES INC.
    
    (COMPUTERSHARE LOGO)
9th Floor, 100 University Avenue
Toronto, Ontario M5J 2Y1
www.computershare.com
 Security Class
 Holder Account Number
 Fold
 Form of Proxy  Annual and Special Meeting of Shareholders to be held on May 18, 2011
 This Form of Proxy is solicited by and on behalf of Management.
 Notes to proxy
 1.
    
    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
proxyholder 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.
    
    Fold
 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 16, 2011.
 VOTE USING THE TELEPHONE OR INTERNET 24 HOURS A DAY 7 DAYS A WEEK!
 (IMAGE)
    
    (IMAGE)  Call the number listed BELOW from a touch
    
      Go to the following web site:tone telephone.
    
    www.investorvote.com1-866-732-VOTE (8683) Toll Free
 If you vote by telephone or the Internet, DO NOT mail back this proxy.
 Voting by mail
 Voting by mail or by Internet
 To vote by telephone or the Internet, you will need to provide your CONTROL NUMBER listed below.
 CONTROL NUMBER




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 Appointment of ProxyholderThe undersigned shareholder of
Theratechnologies Inc. (the
Corporation) hereby appoints:
Paul Pommier, Chairman of the
Board, or failing him, John-Michel
Huss, President and Chief
Executive Officer
    
    OR
    
    Print the name of the person
you are appointing if this
person is someone other than
the Management Nominees
listed herein.
  VOTING RECOMMENDATIONS BY MANAGEMENT ARE INDICATED BY HIGHLIGHTED TEXT OVER THE BOXES.
 For
    
    Withhold1. Election of Directors
    
    
    
    c
    
    cVote FOR or WITHHOLD from voting with respect to the election of directors.FoldFor
    
    Withhold2. Appointment of Auditors
    
    
    
    c
    
    cVote FOR or WITHHOLD from voting with respect to the appointment of auditors.For
    
    Against
    
    Withhold3. Resolution 2011-1 Approving the Amendments to the Articles of the Corporation
    
    c
    
    c
    
    cVote FOR, AGAINST or WITHHOLD from voting with respect to resolution 2011-1.Fold
 
 Authorized Signature(s) - This section must be completed for your instructions to be executed.
    
    Signature(s)
    
    DateI 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.
    
    
    
    DD/MM/YY
 
 Interim Financial Statements- Mark
this box if you would like to
receive Interim Financial Statements
and accompanying Managements
Discussion and Analysis by mail.
    
    o
    
    Annual Report- Mark this box if you
would like to receive the Annual
Report and accompanying Managements
Discussion and Analysis by mail.
    
    o
  n
    
    117131
    
    AR1
    
    THTQ
    
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