Esketamine with Pregabalin and Duloxetine for Pain Relief in Postherpetic Neuralgia

Intravenous Infusion of Esketamine in Combination With Pregabalin and Duloxetine for Postherpetic Neuralgia

Not applicable Interventional Beijing Tiantan Hospital · NCT06896994

This study is testing if combining esketamine with pregabalin and duloxetine can help people with postherpetic neuralgia find faster and better pain relief when pregabalin alone hasn’t worked.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment150 (estimated)
Ages18 Years and up
SexAll
SponsorBeijing Tiantan Hospital Academic / other
Locations1 site (Beijing, Beijing Municipality)
Trial IDNCT06896994 on ClinicalTrials.gov

What this trial studies

This study investigates the effects and safety of esketamine when combined with pregabalin and duloxetine in patients suffering from postherpetic neuralgia (PHN). The goal is to determine if this combination can provide rapid and effective pain relief for patients who have not responded to pregabalin alone. Participants will be monitored over a one-week period to assess pain reduction and any potential side effects. The study aims to offer a new treatment option for those with refractory PHN.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 years old with persistent pain from postherpetic neuralgia lasting more than three months and who have not adequately responded to pregabalin.

Not a fit: Patients with certain medical conditions, such as severe cardiopulmonary issues or a history of drug abuse, may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could significantly alleviate pain for patients suffering from postherpetic neuralgia.

How similar studies have performed: While the combination of these specific treatments is being explored in this study, similar approaches have shown promise in managing chronic pain conditions.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Ages more than 18 years;
2. Pain present for more than 3 months after healing of a herpes zoster skin rash;
3. Has an average pain score of at least 4 on a Numeric Rating Scale (NRS, 0= no pain, 10= worst possible pain);
4. Failed to respond to or tolerate the effective dose of pregabalin monotherapy.

Exclusion Criteria:

1. Obstructive sleep apnoea syndrome;
2. Those who receive interventional treatments;
3. A history of systemic immune diseases, organ transplantation, or cancers;
4. A history of severe cardiopulmonary, hepatic or renal dysfunction;
5. A history of schizophrenia, epilepsy, or myasthenia gravis, delirium;
6. Currently using monoamine oxidase inhibitors (MAOIs);
7. Having untreated angle-closure glaucoma;
8. Those suffering from increased intracranial pressure;
9. Comorbid hyperthyroidism or phaeochromocytoma;
10. Suspected or confirmed history of drug abuse;
11. Having contraindications to esketamine, pregabaline or duloxetine;
12. Communication difficulties;
13. Women who are preparing for pregnancy, in the pregnancy or lactation period.

Where this trial is running

Beijing, Beijing Municipality

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Postherpetic Neuralgiaesketamine
Last reviewed 2026-06-10 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.