Exhibit 99.1

Theratechnologies Announces Proposed Public Offering of Common Shares and Concurrent Private Placement
This news release constitutes a “designated news release” for the purposes of the Company’s prospectus supplement dated December 16, 2021 to its short form base shelf prospectus dated December 14, 2021.
Montreal, Quebec, October 25, 2023 – Theratechnologies Inc. (“Theratechnologies” or the “Company”) (Nasdaq: THTX; TSX: TH), a biopharmaceutical company focused on the development and commercialization of innovative therapies, today announced the launch of a marketed public offering (the “Public Offering”) of common shares of the Company (the “Common Shares”). The Company intends to grant the underwriter a 30-day option to purchase up to an additional 15% of the number of Common Shares to be sold pursuant to the Public Offering (the “Option”).
In connection with the Public Offering, the Company intends to enter into a subscription agreement with Investissement Québec for a concurrent private placement of Common Shares (and Common Share equivalents in the form of pre-funded, non-voting subscription receipts, exchangeable into Common Shares on a one-for-one basis (the “Exchangeable Subscription Receipts”) in lieu of Common Shares), for up to US$12.5 million aggregate gross proceeds (the “Concurrent Private Placement”). As part of the Concurrent Private Placement, it is expected that Investissement Québec will be granted rights to nominate one director to the Company’s board of directors. The consummation of the Concurrent Private Placement will be contingent upon the closing of the Public Offering.
Cantor Fitzgerald & Co. is acting as the underwriter for the Public Offering.
A preliminary prospectus supplement (the “Prospectus Supplement”) to the Company’s short form base shelf prospectus dated December 14, 2021 (the “Base Shelf Prospectus”) was filed with the securities regulatory authorities in each of the provinces of Canada as well as with the U.S. Securities and Exchange Commission (the “SEC”) as part of its registration statement on Form F-10 (the “Registration Statement”) under the U.S.-Canada multijurisdictional disclosure system (“MJDS”). The Public Offering will be made in Canada only pursuant to the Prospectus Supplement and Base Shelf Prospectus and in the United States only pursuant to the Registration Statement, containing the Prospectus Supplement and the Base Shelf Prospectus, filed with the SEC under the MJDS. Copies of the Prospectus Supplement and the Base Shelf Prospectus are available on SEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov, and a copy of the Registration Statement is available on EDGAR at www.sec.gov. Copies may also be obtained from Cantor Fitzgerald & Co., Attention: Capital Markets, 110 East 59th Street, 6th Floor, New York, New York 10022, or by e-mail at prospectus@cantor.com.
Completion of the Public Offering and Concurrent Private Placement will be subject to customary closing conditions, including the listing of the Common Shares and the Common Shares underlying the Exchangeable Subscription Receipts on the Toronto Stock Exchange and the submission of notice to the Nasdaq Global Market.
Prospective investors should read the Prospectus Supplement, Base Shelf Prospectus and Registration Statement before making an investment decision.