Exhibit 99.6

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Theratechnologies Inc. (the “Company”) on Form 40-F for the period ended November 30, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Luc Tanguay, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in this Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 25, 2020	/s/ Luc Tanguay
	Luc Tanguay
	President and Chief Executive Officer
	(Principal Executive Officer)

A signed original of this written statement required by Section 906 has been provided to Theratechnologies Inc. and will be retained by Theratechnologies Inc. and furnished to the Securities and Exchange Commission or its staff upon request.