The Study on the Esketamine in the Treatment of Postherpetic Neuralgia

Herpes zoster (HZ) is an acute herpetic skin disease caused by the reactivation of the varicella-zoster virus (VZV) latent in the sensory ganglia. Postherpetic neuralgia (PHN) often occurs after herpes zoster heals and persists for a long time. At present, clinically anticonvulsants (such as gabapentin, pregabalin) and antidepressants (such as amitriptyline) are clinically first-line drugs for the treatment of PHN, which are not usually effective to treat PHN well, as well as to alleviate patients' bad mental symptoms. Esketamine, as a well-known N-methyl-D-aspartate receptor inhibitor, has both analgesic and antidepressant effects with extremely few incidence of respiratory depression, delirium, hallucinations, nausea and vomiting. Therefore, we hypothesize that esketamine could relieve PHN and Anxiety and depression-like symptoms symptoms in patients with PHN. This study intended to compare the efficacy of pregabalin, amitriptyline combined with esketamine therapy and pregabalin combined with amitriptyline therapy for alleviating PHN, and to further explore the feasibility and safety of esketamine in the treatment of PHN as well as underlying the mechanism of esketamine on the PHN.

Study Overview

• Status: Recruiting
• Conditions: Postherpetic Neuralgia; Esketamine
• Intervention / Treatment: Drug: Saline; Drug: esketamine

• Study Type: Interventional
• Enrollment (Anticipated): 48
• Phase: Phase 4

Contacts and Locations

• Study Contact: Name: Lieju Wang, Master; Phone Number: 18758131223; Email: 11518264@zju.edu.cn

Study Locations

• China
  • Zhejiang
    • Hangzhou, Zhejiang, China, 310000
      • Recruiting
      • The Second Affiliated Hospital of Zhejiang University anesthesiology department

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 80 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• 18-80 years old; Patients with post-herpetic neuralgia with anxiety and depression; NRS ≧4 points; A and (or) D ≧8 points in the Hospital Anxiety and Depression Scale (HADS) ; The course of disease ≧3 months; Patients with invalid conventional treatment (pregabalin or gabapentin combined with anti-anxiety depression, anti-epileptic dugs).

Exclusion Criteria:

• Present acute and chronic pain caused by other disease during treatment; Serious systemic disease; Severe infection, history of heart, lung, liver and kidney dysfunction, tumor, immunodeficiency and other serious diseases, or currently receiving or have recently received immunosuppression or cytotoxic drug treatment; A history of mental illness such as epilepsy, depression, Alzheimer's, multiple sclerosis, Parkinson, etc., and a history of head trauma; Participating in another clinical trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment group	Drug: esketamine; The in-hospital intervention process is divided into a titration phase and an effect evaluation phase. After admission, all patients received pregabalin 150mg twice for one day and amitriptyline 12.5mg one piece per night. The treatment group was combined with intranasal esketamine three times per day, and individualized concentration titration was performed within 5 days. Set the initial dosage to 10mg for nasal drops. If the score is less than 5 points compared to the basic value, the dose is increased by 5 mg each time. When the dose reaches 25mg, the increment of the dose will be adjusted to 10mg. If the score is reduced by ≥5 points compared to the basic value, the current dose will be maintained and the titration will end. The titration phase will be finished when the titration dose reaches 35mg or untolerable adverse reactions occurs. Finally, a 7 tesla scan was performed on the right-hand patients with herpes on the body to explore the effect of ketamine on the brain network.
Placebo Comparator: Control group	Drug: Saline; The titration process in the control group with saline are the same as those in the treatment group with esketamine.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Numeric rating scales	The score to assess the pain degree	Baseline, once for the period of drug administration

Collaborators and Investigators

• Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University
• Investigators: Study Chair: Min Yan, Doctor, The second affiliated hospital of Zhejiang University hangzhou, Zhejiang, China

Study record dates

Study Major Dates

• Study Start (Actual): November 25, 2020
• Primary Completion (Anticipated): June 1, 2022
• Study Completion (Anticipated): December 1, 2023

Study Registration Dates

• First Submitted: December 6, 2020
• First Submitted That Met QC Criteria: December 6, 2020
• First Posted (Actual): December 11, 2020

Study Record Updates

• Last Update Posted (Actual): December 11, 2020
• Last Update Submitted That Met QC Criteria: December 6, 2020
• Last Verified: December 1, 2020

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Nervous System Diseases; Pain; Neurologic Manifestations; Neuromuscular Diseases; Peripheral Nervous System Diseases; Neuralgia; Neuralgia, Postherpetic; Psychotropic Drugs; Antidepressive Agents; Esketamine
• Other Study ID Numbers: 2020-1035

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No