Phase 1b Safety Study of Xevinapant, Weekly Cisplatin, and RT in Participants With Unresected LA SCCHN (HyperlynX)

A Single Arm, Open Label, Phase 1b Study of Xevinapant in Combination With Weekly Cisplatin and Intensity-modulated Radiotherapy to Assess Safety and Tolerability in Participants With LA SCCHN, Suitable for Definitive Chemoradiotherapy (HyperlynX)

The purpose of this study is to evaluate the tolerability and safety of Xevinapant when added to weekly cisplatin-based concurrent chemoradiotherapy (CRT) in the treatment of participants with unresectable locally advanced squamous cell carcinoma of the head and neck, suitable for definitive chemoradiotherapy.

Inclusion Criteria:

• Participants having an Eastern Cooperative Oncology Group Performance Score (ECOG PS) of 0 - 1
• Histologically confirmed diagnosis in previously untreated Locally Advanced Squamous Cell Carcinoma of Head and neck (LA SCCHN) patient (Stage III, IVA, or IVB according to the American Joint Committee on Cancer [AJCC]/ Tumor Nodes and metastases (TNM) Staging System, 8th Edition) suitable for definitive Chemoradiotherapy (CRT), with one of the following primary sites: oropharynx (OPC) Human Papillomavirus (HPV)-negative, hypopharynx, and larynx
• Participant should be able to swallow liquids or has an adequately functioning feeding tube, gastrostomy, or jejunostomy in place. For participants requiring liquid nutrition at baseline or during the study including the follow-up period, access to liquid nutrition supply should be ensured
• Participant with evaluable tumor burden (measurable and/or non-measurable tumor lesions) assessed by CT scan and/or MRI, based on RECIST v 1.1.
• Adequate hematological, hepatic, and renal function as defined in the protocol
• Other protocol defined inclusion criteria could apply

Exclusion Criteria:

• Primary tumor of nasopharyngeal, paranasal sinuses, nasal, or oral cavity, salivary, thyroid, or parathyroid gland pathologies, skin, or unknown primary site
• Metastatic disease (Stage IVC as per AJCC/TNM, 8th Edition)
• Existing need of a hearing aid or greater than or equal to (>=) 25 decibel shift over 2 contiguous frequencies on a pretreatment hearing test as clinically indicated
• Known history of infection with human immunodeficiency virus (HIV). If unknown history of HIV, an HIV screening test is to be performed and participants with positive serology for HIV-1/2 must be excluded
• Known gastrointestinal disorder with clinically established malabsorption syndrome and major gastrointestinal surgery in the last 12 months that may limit oral absorption
• Other protocol defined exclusion criteria could apply