Gabapentin, Methadone, and Oxycodone With or Without Venlafaxine Hydrochloride in Managing Pain in Participants With Stage II-IV Squamous Cell Head and Neck Cancer Undergoing Chemoradiation Therapy

PRIMARY OBJECTIVES:

I. To assess the pain-reduction effects of adding venlafaxine to a regimen of gabapentin and methadone to control pain during and after chemoradiation.

SECONDARY OBJECTIVES:

I. To assess the effect of venlafaxine hydrochloride (venlafaxine) of the rate of toxicities possibly or probably related to the pain control regimen.

TERTIARY OBJECTIVES:

I. The effect of venlafaxine on other quality of life scores, patient nutrition, hydration status, and opioid requirements during and after chemoradiotherapy (CRT).

OUTLINE: Participants are randomized to 1 of 2 arms.

ARM I: Participants receive gabapentin orally (PO) daily or 3 times a day (TID). Participants may also receive methadone PO TID and oxycodone PO every 8 hours as needed. Treatment continues for up to 12 months in the absence of disease progression or unacceptable toxicity.

ARM II: Participants receive gabapentin, methadone, and oxycodone as in Arm I and venlafaxine PO twice daily (BID) or venlafaxine hydrochloride extended release daily for up to 12 months in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, participants are followed up at 4 weeks, 3, 6, 9, and 12 months, and then every 6 months for up to 24 months.