Patients will rinse oral cavity with 10cc of placebo oral rinse for 2 minutes 3 times a day.

Oral cavity sensitivity was assessed by an oral cavity specific quality of life questionnaire. Sensitivity was rated based on a 0-10 rating scale on which subjects selected a single integer. 0 = no sensitivity and 10 = worst sensitivity. A negative value indicates an increase in oral sensitivity. A positive value indicates an improvement in patient-perceived oral sensitivity.

Oral cavity dryness was assessed by an oral cavity specific quality of life questionnaire. Dryness was rated based on a 0-10 rating scale on which subjects selected a single integer. 0 = no dryness and 10 = worst dryness. A negative value indicates an increase in patient-perceived oral dryness. A positive value indicates an improvement in patient-perceived oral dryness.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Peripheral blood was drawn at baseline and day 28 of clobetasol rinse use, and clobetasol levels were measured in the blood sample. Plasma concentrations of clobetasol were measured using a validated LC-MS/MS assay with a lower limit of quantification of 0.05 ng/mL. Any values below detectable limit or with no peak were adjusted to 0.

Here is the count of participants with serious and non-serious adverse events assessed by the Common Terminology Criteria in Adverse Events (CTCAE v4.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Total of all reporting groups

Oral cavity pain was assessed by an oral cavity specific quality of life questionnaire. Pain was rated based on a 0-10 rating scale on which subjects selected a single integer. 0 = no pain and 10 = worst pain. A negative value indicates an increase in oral pain. A positive value indicates an improvement in patient-perceived oral pain.

18/19 are analyzed in the Clobetasol grp because one participant declined participation before treatment started. Clobetasol and Placebo grps were not assessed separately at Day 28. Only those pts who completed 4 wks of active clobetasol treatment and did not have an active oral infection at the 4 week timepoint were included in the final analysis.

Oral cavity sensitivity was assessed by an oral cavity specific quality of life questionnaire. Sensitivity was rated based on a 0-10 rating scale on which subjects selected a single integer. 0 = no sensitivity and 10 = worst sensitivity. A negative value indicates an increase in oral sensitivity. A positive value indicates an improvement in patient-perceived oral sensitivity.

18/19 are analyzed in the Clobetasol grp because one participant declined participation before treatment started.

Oral cavity dryness was assessed by an oral cavity specific quality of life questionnaire. Dryness was rated based on a 0-10 rating scale on which subjects selected a single integer. 0 = no dryness and 10 = worst dryness. A negative value indicates an increase in patient-perceived oral dryness. A positive value indicates an improvement in patient-perceived oral dryness.

18/19 are analyzed in the Clobetasol grp because one participant declined participation before treatment started.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Per protocol, pharmacokinetic testing was only done on the first 10 patients in the clobetasol group. We are reporting a calculation based on these 3 time points, not a number that can be reported at 3 discrete times.

Peripheral blood was drawn at baseline and day 28 of clobetasol rinse use, and clobetasol levels were measured in the blood sample. Plasma concentrations of clobetasol were measured using a validated LC-MS/MS assay with a lower limit of quantification of 0.05 ng/mL. Any values below detectable limit or with no peak were adjusted to 0.

37/40 participants are included in this laboratory assessment as interpretable data was not available for 3 patient samples.

Here is the count of participants with serious and non-serious adverse events assessed by the Common Terminology Criteria in Adverse Events (CTCAE v4.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.

18/19 are analyzed in the Clobetasol arm/group because one participant declined participation before treatment started.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Per protocol, pharmacokinetic testing was only done on the first 10 patients in the clobetasol group. We are reporting a calculation based on these 3 time points, not a number that can be reported at 3 discrete times.

Steady-state pharmacokinetics of systemic clobetasol were assessed following a single 2 min oral rinse of 0.05% clobetasol on day 14 (1 patient collected on day 12). A noncompartmental pharmacokinetic assessment was performed using WinNonlin v5 (Pharsight Corp, Mountain View, CA) from three sampling times (pre-rinse, 15-45 min post-rinse, and 90-120 min post-rinse). Plasma concentrations of clobetasol were measured using a newly designed and validated LC-MS/MS assay, with a lower limit of quantification of 0.05 ng/mL. The maximum plasma concentrations (CMAX) were recorded as observed values and the area under the plasma-concentration time curve using all three sampling time points (AUCALL) was calculated using the Linear Trapezoidal rule.

Per protocol, pharmacokinetics testing was only done on the first 10 patients in the clobetasol group.

Patients will rinse oral cavity with 10cc of placebo oral rinse for 2 minutes 3 times a day.

Placebo oral rinse: Patients will rinse oral cavity with 10cc of placebo oral rinse for 2 minutes 3 times a day.

Patients will rinse oral cavity with 10cc of placebo oral rinse for 2 minutes 3 times a day.

Placebo oral rinse: Patients will rinse oral cavity with 10cc of placebo oral rinse for 2 minutes 3 times a day.

enlarging mediastinal lymphadenopathy

EBV low positive

CMV reactivation