To confirm the feasibility of studying Xtampza ER during radiotherapy (RT) for locally advanced head and neck cancer (LAHNC) as part of a prospective clinical trial. Investigators will also assess pain control, quality of life, and drug related toxicity during RT and during short term follow-up.
To confirm the feasibility of studying Xtampza ER during radiotherapy (RT) for LAHNC as part of a prospective clinical trial.