Exhibit 24

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints each of Ronald M. Lombardi, Christine Sacco and William P’Pool, signing singly, the undersigned's true and lawful attorney-in-fact to:

execute for and on behalf of the undersigned, in the undersigned's capacity as a director and/or officer and/or owner of greater than 10% of the outstanding Common Stock of Prestige Brands Holdings, Inc., a Delaware corporation (the “Company”), Form 144 and Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules and regulations promulgated thereunder as well as a Schedule 13D or Schedule 13G and any amendments thereto;

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 144, Form 3, 4 or 5 or Schedule 13D or Schedule 13G, complete and execute any amendment or amendments thereto, and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority, including the New York Stock Exchange; and

take any and all other actions 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 Securities Exchange Act of 1934.

This Power of Attorney revokes any prior power of attorney relating to the subject matter hereof and shall remain in full force and effect until the undersigned is no longer required to file Form 144, Forms 3, 4 and 5 and Schedule 13D or Schedule 13G with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed on May 8, 2017.

/s/Gary E. Costley, PH.D.

Gary E. Costley, PH.D.

COSTLEY GARY E 4