13D Filing: Park West Asset Management and PLX Pharma Inc. (PLXP)

Exhibit A

AGREEMENT

In accordance with Rule 13d-1(k) under the
Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of them of a statement
on Schedule 13D (including amendments thereto) with respect to the shares of common stock, $0.001 par value per share, of
PLx Pharma Inc., a Delaware corporation, and further agree that this Joint Filing Agreement be included as Exhibit A to such Schedule
13D.  In evidence thereof, the undersigned hereby execute this agreement this 20th day of November, 2017.