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Patients receive doxepin hydrochloride oral rinse (swish, gargle, and spit) over 1 minute on day 1. Patients may crossover to arm II on day 2.

Patients receive placebo oral rinse (swish, gargle, and spit) over 1 minute on day 1. Patients may crossover to arm I on day 2.

doxepin hydrochloride

placebo

Robert C. Miller, MD

RATIONALE: Doxepin hydrochloride may be an effective treatment for oral mucositis pain in patients undergoing radiation therapy with or without chemotherapy.

PURPOSE: This randomized phase III trial is studying doxepin hydrochloride to see how well it works compared to placebo in treating oral mucositis pain in patients with head and neck cancer undergoing radiation therapy with or without chemotherapy.

OUTLINE: This is a multicenter study. Patients are stratified according to gender, concurrent radiosensitizing chemotherapy (yes vs no), and age (\< 60 years vs ≥ 60 years). Patients are randomized to 1 of 2 treatment arms.

* Arm I: Patients receive doxepin hydrochloride oral rinse (swish, gargle, and spit)\* over 1 minute on day 1. Patients may crossover to arm II on day 2.
* Arm II: Patients receive placebo oral rinse (swish, gargle, and spit)\* over 1 minute on day 1.

Patients may crossover to arm I on day 2. The primary and secondary objectives are detailed below.

Primary Objective:

Determine whether doxepin oral rinse is effective in reducing OM-related pain in patients undergoing RT to the oral cavity, as measured by a patient-reported questionnaire at 5,15, 30, 60, 120 and 240 minutes

Secondary Objectives:

1. Assess the adverse event profile of doxepin rinse using a patient-reported questionnaire at 5, 15, 30, 60, 120 and 240 minutes for domains of unpleasant taste, burning or stinging discomfort, and drowsiness.
2. Compare the incidence of using alternative analgesics before 4 hours, between the doxepin oral rinse and placebo arms.
3. Assess patient preference for continued therapy with oral rinse after initial test rinse or after the cross-over phase.

NOTE: \* Patients are instructed to avoid taking medications for mucositis pain 60 minutes before and after study medication.

After completing study therapy, patients have the option to receive doxepin hydrochloride oral rinse every 4 hours as needed during radiotherapy.

Patients complete questionnaires at baseline, and at 5, 15, 30, 60, 120, and 240 minutes after study medication. Patients who choose to continue doxepin hydrochloride oral rinse also complete weekly questionnaires.

Doxepin Hydrochloride in Treating Oral Mucositis Pain in Patients With Head and Neck Cancer Undergoing Radiation Therapy With or Without Chemotherapy

A Randomized Double-Blind Study of Doxepin Rinse Versus Placebo in the Treatment of Acute Oral Mucositis Pain in Patients Receiving Radiotherapy With or Without Chemotherapy

The total pain reduction will be calculated by the (average of mouth and throat) area under the curve (AUC) adjusting for baseline, with time scale replaced by a numerical scale of 1,2,3,4,5,6. The numerical scale will be used rather than the raw time scale in order to give proper weights to more immediate patient-reported mouth pain outcomes after treatment. The AUC will be calculated by proration when there are terminal missing data. If the missing data are intermittent, simple imputation will be applied to calculate the AUC. The question ('On a scale from 0 to 10, what number best describes your MOUTH PAIN due to your radiation treatment now?') used 11-point numerical analog scales (0 (no pain) to 10 (worst pain imaginable or possible) scores) to measure pain. The AUCs for the two treatment arms were compared by using the Wilcoxon rank sum test with 95% CIs.

The total taste of the oral rinse will be calculated by the area under the curve (AUC) adjusting for baseline, with time scale replaced by a numerical scale of 1,2,3,4,5,6 , and analyzed in the same way as the primary endpoint. The numerical scale will be used rather than the raw time scale in order to give proper weights to more immediate patient-reported mouth pain outcomes after treatment. The AUC will be calculated by proration when there are terminal missing data. If the missing data are intermittent, simple imputation will be applied to calculate the AUC. The question ('On a scale from 0 to 10, what number best describes the TASTE OF THE ORAL RINSE now?') used 11-point numerical analog scales (0 (acceptable taste) to 10(terrible taste), with higher values representing worse outcome) to evaluate the total taste of the oral rinse. The AUCs for the two treatment arms were compared by using the Wilcoxon rank sum test with 95% CIs.

The total stinging or burning from the oral rinse will be calculated by the area under the curve (AUC) adjusting for baseline, with time scale replaced by a numerical scale of 1,2,3,4,5,6. The numerical scale will be used rather than the raw time scale in order to give proper weights to more immediate patient-reported mouth pain outcomes after treatment. The AUC will be calculated by proration when there are terminal missing data. If the missing data are intermittent, simple imputation will be applied to calculate the AUC. The question ('On a scale from 0 to 10, what number best describes any STINGING OR BURNING FROM THE ORAL RINSE now?') used 11-point numerical analog scales (0 (no stinging or burning) to 10 (worst stinging or burning possible) scores) to total stinging or burning from the oral rinse. The AUCs for the two treatment arms were compared by using the Wilcoxon rank sum test with 95% CIs.The statistical analysis will be the same as the primary analysis.

The total drowsiness increase will be calculated by the area under the curve (AUC) adjusting for baseline, with time scale replaced by a numerical scale of 1,2,3,4,5,6. The numerical scale will be used rather than the raw time scale in order to give proper weights to more immediate patient-reported mouth pain outcomes after treatment. The AUC will be calculated by proration when there are terminal missing data. If the missing data are intermittent, simple imputation will be applied to calculate the AUC. The question ('On a scale from 0 to 10, what number best describes your DROWSINESS now?') used 11-point numerical analog scales (0 (no drowsiness) to 10 (extreme drowsiness, leading to sleep) scores) to measure total drowsiness increase. The AUCs for the two treatment arms were compared by using the Wilcoxon rank sum test with 95% CIs. The statistical analysis will be the same as the primary analysis.

The incidence of utilizing additional analgesics between 2 and 4 hours after the initial mouthwash will be compared between the arms by the Chi-square test .

After each dose was administered, patients were asked if they would like to continue rinses with that particular agent. The percentage of patients who expressed an interest in continuing therapy are reported below.

National Cancer Institute (NCI)

Alliance for Clinical Trials in Oncology

The descriptions and grading scales found in the revised NCI Common Terminology Criteria for Adverse Events (CTCAE) version 4.0 will be utilized for AE reporting. All graded adverse events are reported.

Patients receive (10 mg/mL x 2.5 mL) 25 mg doxepin hydrochloride (diluted to 5 mL with 2.5 mL of sterile water for irrigation, or sterile water for injection, or distilled water) oral rinse (swish, gargle, and spit) over 1 minute on day 1. Patients may crossover to arm II on day 2.

Arm I (Doxepin-Placebo)

Patients receive 2.5 mL placebo (diluted to 5 mL with 2.5 mL of sterile water for irrigation, or sterile water for injection, or distilled water) oral rinse (swish, gargle, and spit) over 1 minute on day 1. Patients may crossover to arm I on day 2.

Arm II (Placebo-Doxepin)

Total

Age, Continuous

Sex: Female, Male

United States

Region of Enrollment

Robert C. Miller, M.D.

If a patient cancels, is missing baseline data, or only provides baseline data, he/she will be excluded from the statistical analysis. The primary analysis of the total pain reduction will only use primary data from the first phase.

Total Pain Reduction (Mouth and Throat)

If a patient cancels, is missing baseline data, or only provides baseline data, he/she will be excluded from the statistical analysis.

Total Taste of the Oral Rinse

Total Stinging or Burning From the Oral Rinse

Total Drowsiness Increase

At 2 hours after the initial mouthwash

At 4 hours after the initial mouthwash

Incidence of Using Alternative Analgesics Between 2 and 4 Hours After the Initial Mouthwash

Patient Preference for Continuing Therapy With Oral Doxepin Hydrochloride

Overall Study

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Doxepin Hydrochloride in Treating Oral Mucositis Pain in Patients With Head and Neck Cancer Undergoing Radiation Therapy With or Without Chemotherapy	NCT01156142	Head and Neck C... Mucositis Oral Complicati... Pain	doxepin hydroch... placebo	18 Years -	Alliance for Clinical Trials in Oncology
Doxepin Hydrochloride in Treating Oral Mucositis Pain in Patients With Head and Neck Cancer Undergoing Radiation Therapy With or Without Chemotherapy	NCT01156142	Head and Neck C... Mucositis Oral Complicati... Pain	doxepin hydroch... placebo	18 Years -	Alliance for Clinical Trials in Oncology

Spots Global Cancer Trial Database for squamous cell carcinoma of the lip and oral cavity