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 her true and lawful
attorney-in-fact and agent with full power of substitution, signing singly, for
her and in her 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 16th day of September, 2013.


                                        Signature: /s/ M. Kathleen Behrens
                                                   -----------------------
                                                   M. Kathleen Behrens