This clinical trial is focused on studying a type of cancer called squamous cell carcinoma of the head and neck. This cancer affects areas such as the mouth, throat, and voice box. The study is investigating the effects of a treatment called xevinapant, which is also known by its code name Debio 1143. Xevinapant is taken as an oral solution, meaning it is a liquid that is swallowed. The trial will compare the effects of xevinapant combined with radiotherapy to a placebo combined with radiotherapy. A placebo is a substance with no active medication.
The purpose of the study is to see if adding xevinapant to radiotherapy can help improve the time patients live without the cancer coming back or getting worse. The study will involve older patients who have locally advanced head and neck cancer, which means the cancer has spread to nearby tissues but not to distant parts of the body. Participants will receive either xevinapant or a placebo along with their radiotherapy treatment. The study will monitor how long patients remain free from cancer progression and will also look at overall survival, response to treatment, and any side effects experienced.
Throughout the study, patients’ health and quality of life will be assessed using various scales and questionnaires. The trial aims to provide valuable information on whether xevinapant can offer additional benefits to standard radiotherapy in treating this type of cancer. The study is expected to continue until June 2030, with recruitment having started in September 2023.



Belgium
France
Germany
Ireland
Italy
Norway
Slovenia
Spain
The Netherlands