POWER OF ATTORNEY


      KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints Christopher Garabedian, Sandesh Mahatme, David Tyronne Howton and
Michael Flanagan, and their respective successors, and each of them his true and
lawful attorney-in-fact and agent with full power of substitution, signing
singly, for his and in his name, place and stead, in any and all capacities, to:

      1.  prepare, execute in the undersigned's name and on the undersigned's
          behalf, and submit to the U.S. Securities and Exchange Commission (the
          "SEC") a Form ID, including amendments thereto, and any other
          documents necessary or appropriate to obtain codes and passwords
          enabling the undersigned to make electronic filings with the SEC of
          reports required by Section 16(a) of the Securities Exchange Act of
          1934 (as amended, the "Exchange Act") or any rule or regulation of the
          SEC;

      2.  complete and execute for and on behalf of the undersigned, in the
          undersigned's capacity as an officer and/or director of Sarepta
          Therapeutics, Inc. (the "Company") and/or 10% holder of the Company's
          capital stock, Forms 3, 4, 5 and Form ID, any other forms, and any
          amendments thereto in accordance with Section 16(a) of the Exchange
          Act and the rules and regulations thereunder;

      3.  do and perform any and all acts for and on behalf of the undersigned
          which may be necessary or desirable to complete and execute any such
          Form 3, 4, 5 or Form ID, or any other forms,  complete and execute any
          amendment or amendments thereto, and timely file such form with the
          SEC and any stock exchange or similar authority; and

      4.  take any other action of any type whatsoever in connection with the
          foregoing which, in the opinion of such attorney-in- fact, may be of
          benefit to, in the best interest of, or legally required by, the
          undersigned, it being understood that the documents executed by such
          attorney-in-fact on behalf of the undersigned pursuant to this Power
          of Attorney shall be in such form and shall contain such terms and
          conditions as such attorney-in-fact may approve in such attorney-in-
          fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Exchange Act.

      The undersigned agrees that each such attorney-in-fact herein may rely
entirely on information furnished orally or in writing by the undersigned to
such attorney-in-fact.  The undersigned also agrees to indemnify and hold
harmless the Company and each such attorney-in-fact against any losses, claims,
damages or liabilities (or actions in these respects) that arise out of or are
based upon any untrue statements or omission of necessary facts in the
information provided by the undersigned to such attorney-in fact for purposes of
executing, acknowledging, delivering or filing Forms 3, 4 or 5, Form ID or any
other form (including amendments thereto) and agrees to reimburse the Company
and such attorney-in-fact for any legal or other expenses reasonably incurred in
connection with investigating or defending against any such loss, claim, damage,
liability or action.

      This Power of Attorney supersedes any power of attorney previously
executed by the undersigned regarding the purposes outlined in the first
paragraph hereof ("Prior Powers of Attorney"), and the authority of the
attorneys-in-fact named in any Prior Powers of Attorney is hereby revoked.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier (a) revoked by the undersigned in a signed writing delivered to
the foregoing attorneys-in-fact or (b) superseded by a new power of attorney
regarding the purposes outlined in the first paragraph hereof dated as of a
later date.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 9th day of January, 2014.


                                    Signature:   /s/ Arthur M. Krieg, M.D.
                                               ---------------------------------
                                               Arthur M. Krieg, M.D.