EXHIBIT 99.1

AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement on Schedule 13G relating to the Common Stock of Chelsea Therapeutics International, Ltd. is being filed with the Securities and Exchange Commission on behalf of each of them.

February 14, 2014

BAKER BROS. ADVISORS LP
By:  Baker Bros. Advisors (GP) LLC, its
general partner
By:	/s/ Scott L. Lessing
	Name: Scott L. Lessing
	Title: President

BAKER BROS. ADVISORS (GP)
LLC
By:	/s/ Scott L. Lessing
	Name: Scott L. Lessing
	Title: President

/s/ Julian C. Baker

  Julian C. Baker

/s/ Felix J. Baker

 Felix J. Baker