Tetrahydroquinoline sulfonamide derivatives of formula (I), the pharmaceutically acceptable addition salts thereof, the hydrates and/or solvates thereof, and the use of same as inverse agonists of retinoid-related orphan receptor gamma (RORγt) are described. Pharmaceutical compositions including such compounds, as well as the use thereof for the topical and/or oral treatment of RORγt receptor-mediated inflammatory diseases, in particular acne, psoriasis and/or atopic dermatitis are also described.