Exhibit 5.2

November 22, 2021 File No.: 116744.00128 Jean-Pierre Chamberland Direct +1 514 397 5186 jchamberland@fasken.com

THERATECHNOLOGIES INC.

2015 Peel Street

11^th Floor

Montreal, Québec H3A 1T8

Dear Mesdames/Sirs:

Re:     Registration Statement on Form F-10 of Theratechnologies Inc.

We hereby consent to the reference to our firm on the face page of the short form base prospectus (the “Prospectus”) filed as part of this Registration Statement on Form F-10 and to the reference to our firm name under the heading “Legal Matters” in the Prospectus. By giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations promulgated thereunder.

Yours truly,

FASKEN MARTINEAU DuMOULIN LLP

(signed) FASKEN MARTINEAU DuMOULIN LLP

JPC.