Eledon Pharmaceuticals (ELDN) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated March 3, 2017 relating to the financial statements, which appears in Tokai Pharmaceuticals, Inc.‘s Annual Report on Form10-K for the year ended December 31, 2016.

/s/ PricewaterhouseCoopers LLP

Boston, MA

March 3, 2017