Exhibit 10.64

AMENDMENT NO. 1 TO LICENSE AND SUPPLY AGREEMENT

This AMENDMENT NO. 1 TO LICENSE AND SUPPLY AGREEMENT (this “Amendment”) is made and entered into as of October 9, 2013 and shall become effective upon the closing of an IPO (as defined in the License Agreement). This Amendment amends that certain License and Supply Agreement dated as of May 23, 2013 (the “License Agreement”), by and between Ruthigen, Inc., a Delaware corporation (“Ruthigen”) and Oculus Innovative Sciences, Inc., a Delaware corporation (“Oculus”). Capitalized terms used and not defined herein shall have the meanings given to them in the License Agreement.

WHEREAS, Section 15.13 of the License Agreement provides that the License Agreement may be amended, if such amendment is reduced to writing and signed by the authorized officers of both Parties to the License Agreement;

WHEREAS, the Parties wish to amend the second milestone event listed in Section 7.1 of the License Agreement as set forth herein.

NOW, THEREFORE, in consideration of the mutual covenants, agreements and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Parties agree as follows:

1. Amendment to Second Milestone Event. The second milestone event set forth in Section 7.1 of the License Agreement is hereby deleted in its entirety and the following inserted in lieu thereof:

2. Effect of this Amendment. Except as specifically amended as set forth herein, each term and condition of the License Agreement shall continue in full force and effect.

3. Governing Law. This Amendment shall be governed by and construed in accordance with the laws in force in the State of California, without giving effect to the choice of laws provisions thereof.

4. Counterparts; Facsimile Signatures. This Amendment may be executed or consented to in counterparts, each of which shall be deemed an original and all of which taken together shall constitute one and the same instrument. This Amendment may be executed and delivered by facsimile or electronically and, upon such delivery, the facsimile or electronically transmitted signature will be deemed to have the same effect as if the original signature had been delivered to the other party.

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IN WITNESS WHEREOF, the Parties have caused this Amendment No. 1 to License and Supply Agreement to be duly executed and delivered by their proper and duly authorized officers as of the day and year first above written.