Baclofen-Amitriptyline Hydrochloride-Ketamine Gel in Treating Peripheral Neuropathy Caused by Chemotherapy in Patients With Cancer

Motor Neuropathy as Measured by the EORTC QLQ-CIPN20 at Baseline and Week 4

The scoring algorithm for the parent instrument, the EORTC QLQ-C30, was applied for linearly converting items and subscales of CIPN-20 to 0-100 scales so that a high score corresponds to better condition or less symptom. The secondary analysis was to compare changes from baseline at 4 weeks for the motor neuropathy subscale of the CIPN-20. To analyze this endpoint, the area under the curve (AUC) from baseline to week 4 was calculated for each patient's motor neuropathy score. The average AUC for the placebo arm was compared to the average AUC for the topical amitriptyline HCl/ baclofen/ ketamine arm using a Wilcoxon rank sum test.

Time frame: From Baseline to week 4

Autonomic Symptoms and Functioning as Measured by the EORTC QLQ-CIPN20 at Baseline and Week 4

The scoring algorithm for the parent instrument, the EORTC QLQ-C30, was applied for linearly converting items and subscales of CIPN-20 to 0-100 scales so that a high score corresponds to better condition or less symptom. The secondary analysis was to compare changes from baseline at 4 weeks for the autonomic neuropathy subscale of the CIPN-20. To analyze this endpoint, the area under the curve (AUC) from baseline to week 4 was calculated for each patient's motor neuropathy score. The average AUC for the placebo arm was compared to the average AUC for the topical amitriptyline HCl/ baclofen/ ketamine arm using a Wilcoxon rank sum test.

Time frame: Up to 4 weeks

Mood States and Total Mood Disturbance as Measured by the Profile of Mood States (POMS)

Each mood scale (0 - 100, higher is better mood) will be analyzed as an endpoint along with the total mood disturbance score.

Time frame: At 4 weeks

Pain Severity and Interference as Measured by the Brief Pain Inventory (BPI) at Baseline and Week 4

Pain severity, defined by the four items addressing worst, least, and average pain and pain right now as measured by the BPI will be analyzed identical to the primary endpoint. Additionally, total pain interference as measured by the BPI will be transformed onto a 0-100 ( higher is less pain) point scale. The area under the curve (AUC) from baseline to week 4 was calculated for each patient's score. The average AUC for the placebo arm and the topical amitriptyline HCl/ baclofen/ ketamine arm are reported.

Time frame: Up to 4 weeks

Numbness, Tingling, and Pain as Measured by the Peripheral Neuropathy Questionnaire at Baseline and Weekly for 4 Weeks

The Peripheral Neuropathy Questionnaire was used to analyze this endpoint. Patient neuropathy symptoms were scored on a 0 - 100 scale (higher score represents less symptomatic). The area under the curve (AUC) from baseline to week 4 was calculated for each patient's score. The average AUC for the placebo arm and the topical amitriptyline HCl/ baclofen/ ketamine arm are reported.

Time frame: Up to 4 weeks

Adverse Event Profile of Topical Amitriptyline HCl/ Baclofen/Ketamine > Frequency and Severity of Adverse Events Reported by the Patient in the > Symptom Experience Diary and Evaluated Through Clinical Assessment by NCI CTCAE v3.0

Frequency and severity of adverse events reported by patients in weekly diary and evaluated through clinical assessment by NCI CTCAE v3.0. The number of patients reporting grade 3 or higher events are reported in this outcome measure. For a full list of all events, please refer to the Adverse Events section of this report.

Time frame: Up to 4 weeks