EXHIBIT 99.1

JOINT FILING AGREEMENT

The undersigned hereby agree that the statement on Schedule 13G with respect to the equity securities of NLS Pharmaceutics Ltd.. is, and any amendment thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended. The undersigned hereby further agree that this Joint Filing Agreement be included as an exhibit to such statement and any such amendment. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein and therein but shall not be responsible for the completeness and accuracy of the information concerning the others. This Joint Filing Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

Dated: October 7, 2021

YA II PN, Ltd.
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer
YA Global Investments II (U.S.), Ltd.
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer
YA GLOBAL II SPV, LLC.
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
Yorkville Advisors Global, LP
By: Yorkville Advisors Global II, LLC
Its: General Partner
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer

Yorkville Advisors Global II, LLC
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer
YAII GP, LP
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer
YA II GP II, LLC
By:	/s/ Troy J. Rillo, Esq.
	Troy J. Rillo, Esq.	Date: October 7, 2021
	Chief Compliance Officer

/s/ Mark Angelo	Date: October 7, 2021
Mark Angelo