Partner Fund Management SC 13G ESSA Pharma / PFM Health Sciences ownership change

EXHIBIT 99.1

JOINT FILING AGREEMENT

The undersigned hereby agree that the Statement on Schedule 13G filed herewith (and any amendments thereto), relating to the common stock of ESSA Pharma, Inc., a corporation organized under the laws of British Columbia, Canada, is being filed jointly with the Securities and Exchange Commission pursuant to Rule 13d-1(c) under the Securities Exchange Act of 1934, as amended, on behalf of each of the undersigned.

This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.

Dated this 10^th day of November, 2022.

PFM Health Sciences, LP		PFM Health Sciences GP, LLC
By:	PFM Health Sciences GP, LLC,	By:	/s/ Darin Sadow
	its general partner		Darin Sadow, Authorized Signatory
By:	/s/ Darin Sadow
	Darin Sadow, Authorized Signatory
PARTNER Asset MANAGEMENT, LLC		BRIAN D. GROSSMAN
By:	PFM Health Sciences GP, LLC,	By:	/s/ Darin Sadow
	its manager		Darin Sadow, attorney-in-fact
By:	/s/ Darin Sadow
	Darin Sadow, Authorized Signatory