JOINT FILING AGREEMENT

EXHIBIT 1

JOINT FILING AGREEMENT

In accordance with Rule 13d−1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of Novelion Therapeutics Inc. and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, have executed this Joint Filing Agreement this 19^th day of March, 2018.

SARISSA CAPITAL MANAGEMENT LP
By:	/s/ Xxxx XxXxxxx
	Name:	Xxxx XxXxxxx
	Title:	General Counsel
SARISSA CAPITAL OFFSHORE MASTER FUND LP
By: Sarissa Capital Offshore Fund GP LLC, its general partner
By:	/s/ Xxxx XxXxxxx
	Name:	Xxxx XxXxxxx
	Title:	Authorized Person
SARISSA CAPITAL CATAPULT FUND LLC
By: Sarissa Capital Management LP, its managing member
By:	/s/ Xxxx XxXxxxx
	Name:	Xxxx XxXxxxx
	Title:	General Counsel
/s/Xxxxxxxxx X. Xxxxxx
Xxxxxxxxx X. Xxxxxx

SCHEDULE A

DIRECTORS AND EXECUTIVE OFFICERS OF THE REPORTING PERSONS

The following sets forth the name, position, and principal occupation of each director and executive officer of each of the Reporting Persons. Each such person is a citizen of the United States of America. Except as otherwise indicated, the business address of each director and officer is c/o Sarissa Capital Management LP, 000 Xxxxxxxxx Xxxx, 0^xx Xxxxx, Xxxxxxxxx, XX 00000. To the best of the Reporting Persons' knowledge, except as set forth in this statement on Schedule 13D, none of the directors or executive officers of the Reporting Persons own any Shares.

SARISSA CAPITAL MANAGEMENT LP
SARISSA CAPITAL OFFSHORE MASTER FUND LP
SARISSA CAPITAL CATAPULT FUND LLC

Name		Position
Xxxxxxxxx X. Xxxxxx, Ph.D.		Chief Investment Officer and Authorized Person
Xxxx XxXxxxx		General Counsel and Authorized Person
Xxxxxxx Xxxxxxxxx		Chief Financial Officer and Chief Compliance Officer