Exhibit 10.21


 


Addendum
to the

Convertible Loan Agreement


 


"Addendum"


 


of







 


 





 



  


  


between


  


NLS
Pharmaceutics AG


Alter
Postplatz 2


6370
Stans


Switzerland


"Borrower"


 


and


  


Alexander
Zwyer


Steinwichslenstrasse
9


9052
Niederteufen


		Switzerland	"Lender"



  


 


(Borrower
and Lender each a ʺPartyʺ


collectively
the ʺPartiesʺ)


regarding


extension
of maturity date


 




     


    	Addendum	2/3



    

 


WHEREAS








	 	 
	A.	The
                                         Borrower is a stock corporation (Aktiengesellschaft) in accordance with Swiss
                                         law with its registered seat and prinicipal place of business at Stans (company number
                                         CHE-447.067.367). The Company has a share capital of CHF 139'200.00, divided into 6'960'000
                                         registered shares with a nominal value of CHF 0.02 each, which have been fully paid
                                         in.
	 	 



	B.	The
                                         Lender and the Borrower entered into a convertible loan agreement dated 21 February 2020
                                         ("Agreement"). The Lender agreed to make available to the Borrower a
                                         convertible loan in the amount of CHF 150'000 ("Loan Amount"). This
                                         Loan Amount was reduced with the amendment dated 15 September 2020 to CHF 100'000.00
                                         ("New Amount"). The Lender granted to the Borrower the New Amount.
	 	 



	C.	The
                                         Maturity Date for the repayment of the Convertible Loan together with accrued interest
                                         was set at 30 June 2020 ("Maturity Date").



 


NOW,
THEREFORE, the Parties agree as follows:


 


Any
capitalized terms, if not defined otherwise in this Addendum, shall have the meaning as set forth in the Agreement.


 


		1.	Open
                                         Amount



 


The
Parties hereby confirm that the Convertible Loan has not been repaid to the Lender by the Borrower.


 





		2.	Extension
                                         of Maturity Date



 


The
Maturity Date as set forth in section 4 of the Agreement shall be extended from 30 June 2020 to 31 December 2020.


 


The
Parties therefore confirm that no default interest as set forth in section 2.2 of the Agreement has accrued so far. In any case,
the Lender waives any claim with regard to regular and default interest.


 


		3.	Governing
                                         Law and Jurisdiction



 


This
Addendum shall be governed by and construed in accordance with the substantive laws of Switzerland, without reference to principles
of conflict of laws or choice of laws.


 


All
disputes arising out of or in connection with the Addendum, including disputes on its conclusion, binding effect, amendment and
termination, shall be resolved by the ordinary courts in Stans (NW), Switzerland.


 


[signature
page to follow]


 




     


    	Addendum	3/3



    

 


Borrower





 


NLS
Pharmaceutics AG


 


	/s/
Ronald Hafner	 	/s/ Alexander Zwyer
	Name: Ronald Hafner	 	Name: Alexander Zwyer
	Function: Chairman of the Board	 	Function: CEO



 


  


Lender


 


	/s/ Alexander Zwyer	 	 
	Alexander
    Zwyer: