---
title: Study to Assess Epidural Resiniferatoxin for the Treatment of Intractable Pain Associated With Advanced Cancer
nct_id: NCT05067257
overall_status: SUSPENDED
phase: PHASE2
sponsor: Sorrento Therapeutics, Inc.
study_type: INTERVENTIONAL
primary_condition: Pain, Intractable
countries: United States
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT05067257.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT05067257"
ct_last_update_post_date: 2024-03-18
last_seen_at: "2026-05-12T06:28:46.385Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# Study to Assess Epidural Resiniferatoxin for the Treatment of Intractable Pain Associated With Advanced Cancer

**Official Title:** A Multicenter, Phase 2 Study to Assess the Safety and Efficacy of Epidural Resiniferatoxin for the Treatment of Intractable Pain Associated With Advanced Cancer

**NCT ID:** [NCT05067257](https://clinicaltrials.gov/study/NCT05067257)

## Key Facts

- **Status:** SUSPENDED
- **Why Stopped:** Sorrento Therapeutics filed for chapter 11 bankruptcy.
- **Phase:** PHASE2
- **Study Type:** INTERVENTIONAL
- **Target Enrollment:** 120
- **Lead Sponsor:** Sorrento Therapeutics, Inc.
- **Conditions:** Pain, Intractable, Pain Cancer, Pain
- **Start Date:** 2025-09
- **Completion Date:** 2027-12
- **CT.gov Last Update:** 2024-03-18

## Brief Summary

This Phase 2 study assesses the safety and efficacy of a single injection of Resiniferatoxin versus placebo for the treatment of intractable advanced cancer pain.

## Detailed Description

This is a global multicenter, randomized Phase 2 study for subjects with advanced cancer experiencing intractable pain to assess the safety and efficacy of a single epidural injection of Resiniferatoxin versus vehicle control. Additional subjects who elect to not enroll but are willing to be followed will comprise a Concurrent Control Group. Subjects will be followed for twelve months.

## Eligibility

- **Minimum age:** 18 Years
- **Sex:** ALL
- **Healthy Volunteers:** No

```
Inclusion Criteria:

* Histologically or cytologically confirmed advanced cancer
* Targeted pain area of involvement that is at or below the lower thoracic or chest level down to lower extremities, attributed to the cancer
* If pain is present in other areas, able to differentiate pain in the target area is the primary source of pain
* Intractable pain that has not responded to standard therapies
* Be opioid tolerant, defined as an average daily opioid consumption \> 30 mg oral morphine equivalent dose during the screening and which has been stable for the month prior to screening
* Have a Karnofsky Performance Scale score ≥ 50 at Screening
* In the Investigator's opinion, a reasonable expectation that the subject will be able to complete the study
* Able to comply with the study procedures and give informed consent
* Willing to follow contraception guidelines

Exclusion Criteria:

* Be undergoing or have plans to undergo changes to current cancer treatment from D-7 through M3
* Had an implantation of intrathecal pump or spinal cord stimulator less than 6 weeks prior to D1 or planning to undergo such a placement during the study prior to M3
* Have leptomeningeal metastases in the lumbar area
* Unless approachable via the caudal route, have the level of intended epidural injection within site of prior lumbar spine surgical procedures that could disrupt the epidural space or otherwise impair ability of the injection to reach nerves
* Has evidence of a non-correctable coagulopathy or hemostasis problem including a low platelet count, prothrombin time, abnormal PT or PTT, or on anticoagulant or antiplatelet therapies before and during investigational product (IP) administration
* Have evidence or history of bleeding disorder or disseminated intravascular coagulation, any recent hemorrhage or bleeding event within 4 weeks prior to D1
* Have abnormal neutrophil or serum creatinine
* Is febrile or has other evidence of infection within 24 hours of D1
* Has recently been diagnosed as COVID-19 positive or evidence of active infection. The subject may participate if full recovery has occurred with a negative RT-PCR test (any EUA cleared test) at least 1 week prior to D1
* Has an allergy or hypersensitivity to TRPV1 agonists, bupivacaine, radiographic contrast agents, fentanyl, hydromorphone, or morphine
* Pregnant at Screening or planning on becoming pregnant or currently breastfeeding
* Has an intrathecal shunt, increased intracranial pressure or evidence of brain pathology as determined by symptoms, history, physical examination, and/or magnetic resonance imaging (MRI)
* Is unable or distinguish the target pain from any additional loci of pain at screening
* Non-study related minor surgical procedure ≤ 2 days or major surgical procedure ≤ 7 days prior to screening and must be sufficiently recovered and stable prior to D1
* Has not recovered from toxicities from previous cancer treatment, including chemotherapy, hormone therapy, immunotherapy, radiotherapy or bisphosphonates. Participants are not eligible if they have received such therapy within the month prior to D1
* Non-study related minor surgical procedure ≤ 5 days or major surgical procedure ≤ 21 days prior to enrollment. In all cases, subjects must be sufficiently recovered and stable prior to IP administration on D1
* Arterial thrombi, myocardial infarction, admission for unstable angina, within 3 months prior to screening
* Clinically significant electrocardiogram abnormalities
* Have any medical condition that could adversely impact subject's participation or safety or interfere with pain assessments
* Participation in another investigational trial during the study
```

## Arms

- **Resiniferatoxin** (EXPERIMENTAL) — 15 mcg, 20 mcg, or 25 mcg in 2mL injected once into the epidural space
- **Placebo** (PLACEBO_COMPARATOR) — 2mL injected once into the epidural space
- **Concurrent Control** (NO_INTERVENTION) — No intervention

## Interventions

- **Resiniferatoxin** (DRUG) — Resiniferatoxin is a compound purified from natural sources
- **Placebo** (DRUG) — Vehicle solution

## Primary Outcomes

- **Assess the incidence of any treatment-emergent adverse events of epidural Resiniferatoxin (RTX) [safety and tolerability]** _(time frame: Baseline through study completion at up to approximately 12 months)_ — To assess the safety of epidural RTX including incidence and severity of any short-term and long-term treatment-emergent adverse events (TEAEs) using the Common Terminology Criteria for Adverse Events (CTCAE) criteria

## Secondary Outcomes

- **Assess efficacy of RTX on pain associated with advanced cancer** _(time frame: Baseline through study completion at up to approximately 12 months)_
- **Assess RTX effect on quality of life** _(time frame: Baseline through study completion at up to approximately 12 months)_
- **Assess RTX effect on opioid consumption** _(time frame: Baseline through study completion at up to approximately 12 months)_

## Locations (4)

- Altman Clinical and Translational Research Institute (ACTRI), La Jolla, California, United States
- University of Florida, Gainesville, Florida, United States
- Oregon Health & Science University, Portland, Oregon, United States
- HD Research, Bellaire, Texas, United States

## Recent Field Changes (last 30 days)

- `status.overallStatus` — added _(2026-05-12)_
- `status.whyStopped` — added _(2026-05-12)_
- `status.primaryCompletionDate` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.phases` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `eligibility.minAge` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `outcomes.primary` — added _(2026-05-12)_
- `outcomes.secondary` — added _(2026-05-12)_
- `armsInterventions.arms` — added _(2026-05-12)_
- `armsInterventions.interventions` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.altman clinical and translational research institute (actri)|la jolla|california|united states` — added _(2026-05-12)_
- `locations.university of florida|gainesville|florida|united states` — added _(2026-05-12)_
- `locations.oregon health & science university|portland|oregon|united states` — added _(2026-05-12)_
- `locations.hd research|bellaire|texas|united states` — added _(2026-05-12)_

---

*Canonical: https://parkinsonspathways.com/agent/trials/NCT05067257.md*  
*Source data (authoritative): https://clinicaltrials.gov/study/NCT05067257*  
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