ClinicalTrials.gg
CompletedNCT04774328Updated Sep 14, 2022Results posted

Preliminary Study of CA-008 (Vocacapsaicin) in Patients Undergoing Ventral Hernia Repair

A Phase 1/2 interventional study of CA-008 (vocacapsaicin) and Placebo in Postsurgical Pain, sponsored by Concentric Analgesics. Completed at 1 site in United States. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2022-09-14.

Sponsored by Concentric Analgesics · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Registered 5 months after the study started (first participant enrolled Sep 2020, registered Feb 2021).
Phase
Phase 1/2
Study type
Interventional
Enrollment
34
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

A Three-Part, Phase 1/2, Randomized, Double-blind, Placebo-Controlled, Adaptive Safety, Pharmacokinetics, and Preliminary Efficacy Study of CA-008 (Vocacapsaicin) in Patients Undergoing Ventral Hernia Repair

02

Conditions studied

  • Postsurgical Pain

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03

In context

Pain, Postoperative

5,640 studies on the registry are indexed under Pain, Postoperative; 1,230 are open to participants now.

This study's enrollment of 34 is below the median of 75 across 4,821 interventional studies indexed under Pain, Postoperative.

Browse Pain, Postoperative studies →

Lead sponsor

Concentric Analgesics is the lead sponsor of 7 studies on the registry; none are open to participants now.

Of its 7 completed or terminated interventional studies of FDA-regulated products, 7 (100%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Scheduled elective, primary, open laparotomy with VHR, with retromuscular, preperitoneal mesh placement, with midline fascial reconstruction
  • ASA physical class 1, 2, or 3
  • \</= 40 kg/m2
  • Aged 18-80 years old

Exclusion criteria

Exclusion Criteria:

  • Concurrent condition requiring analgesic treatment during study period
  • Opioid tolerant
  • Known allergy to capsaicin or other study medication
  • Use of prohibited medications
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
34 participants (actual)

Study arms

  • Active comparator
    CA-008 (vocacapsaicin)

    Single administration

    Drug: CA-008 (vocacapsaicin)

  • Placebo comparator
    Placebo

    Single administration

    Drug: Placebo

Interventions

  • Single administration of CA-008 (vocacapsaicin) versus placebo

  • DrugPlacebo

    Single administration of CA-008 (vocacapsaicin) versus placebo

06

What researchers measure

Primary outcomes

  1. Pain at Rest - Part B

    Pain at rest measured by a Numeric Rating Scale (NRS) from time 0 to 96 hours (AUC 0-96). NRS pain scores at rest were collected at 1, 2, 4, 6, 8, 12, 16, 20, 24 and every 4 hours there after post the time of entry into the PACU (while the patient is awake), until discharge from the inpatient until at 96 hour. NRS area under the curve (AUC) is the weighted sum of current pain intensity assessments for a specified time interval. The NRS ranks pain from 0-10; zero being no pain present and 10 being the worst possible pain. Other than 0 and 10, no other pain ratings (2-9) were labeled.

    Time frame: Up to 96 hours

Secondary outcomes

  1. Evoked NRS - Part B

    Evoked NRS pain scores (three maneuvers: coughing, sitting up, walking) from time 0-96 hours. Evoked NRS scores were obtained twice daily in the morning at 10:00AM (± 1h) and in the afternoon at 4:00PM (±1 h). NRS area under the curve (AUC) is the weighted sum of current pain intensity assessments for a specified time interval. The NRS ranks pain from 0-10; zero being no pain present and 10 being the worst possible pain. Other than 0 and 10, no other pain ratings (2-9) were labeled.

    Time frame: Up to 96 hours

  2. Opioid Consumption - Part B

    Total opioid consumption (OC) converted to an oral morphine equivalent (OME) dose from 0 to 96 hours (OC 0-T96) and 0 to Day 8 (OC 0-D8).

    Time frame: Up to Day 8

07

Results

Posted Sep 14, 2022

Participant flow

The clinical trial was conducted at one clinical research surgical center from September 2020 until June 2021. Qualified patients are adults aged 18 to 80 years of age, inclusive, who are planning to undergo an elective, open laparotomy for ventral hernia repair (VHR), with retromuscular, preperitoneal mesh repair and who otherwise meet eligibility criteria.

Participant flow — Overall Study
MilestoneCA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part B
Started101212
Follow-up to 29 days post surgery101212
Completed101212
Not completed000

Outcome measures

PrimaryPain at Rest - Part B

Pain at rest measured by a Numeric Rating Scale (NRS) from time 0 to 96 hours (AUC 0-96). NRS pain scores at rest were collected at 1, 2, 4, 6, 8, 12, 16, 20, 24 and every 4 hours there after post the time of entry into the PACU (while the patient is awake), until discharge from the inpatient until at 96 hour. NRS area under the curve (AUC) is the weighted sum of current pain intensity assessments for a specified time interval. The NRS ranks pain from 0-10; zero being no pain present and 10 being the worst possible pain. Other than 0 and 10, no other pain ratings (2-9) were labeled.

Time frame:
Up to 96 hours
Reported as:
Mean · score on a scale*hours
Pain at Rest - Part B
score on a scale*hoursCA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part B
Pain at Rest - Part B148.98 ± 146.68188.26 ± 120.60
Statistical analysis
  • CA-008 (Vocacapsaicin), 24 mg - Part B vs Placebo - Part B · ANOVA · p = 0.4812 · Median difference (final values): -39.28 · 95% CI -152.97 to 74.40
SecondaryEvoked NRS - Part B

Evoked NRS pain scores (three maneuvers: coughing, sitting up, walking) from time 0-96 hours. Evoked NRS scores were obtained twice daily in the morning at 10:00AM (± 1h) and in the afternoon at 4:00PM (±1 h). NRS area under the curve (AUC) is the weighted sum of current pain intensity assessments for a specified time interval. The NRS ranks pain from 0-10; zero being no pain present and 10 being the worst possible pain. Other than 0 and 10, no other pain ratings (2-9) were labeled.

Time frame:
Up to 96 hours
Reported as:
Mean · score on a scale*hours
Evoked NRS - Part B
score on a scale*hoursCA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part B
Coughing187.58 ± 176.49345.66 ± 135.50
Sitting-up116.24 ± 105.90171.28 ± 105.69
After ambulation143.42 ± 112.71222.14 ± 94.89
Statistical analysis
  • CA-008 (Vocacapsaicin), 24 mg - Part B vs Placebo - Part B · ANOVA · p = 0.0222 · Mean difference (final values): -158.08 · 95% CI -291.29 to -24.87
  • CA-008 (Vocacapsaicin), 24 mg - Part B vs Placebo - Part B · ANOVA · p = 0.2158 · Mean difference (final values): -55.04 · 95% CI -144.61 to 34.53
  • CA-008 (Vocacapsaicin), 24 mg - Part B vs Placebo - Part B · ANOVA · p = 0.0777 · Mean difference (final values): -78.73 · 95% CI -166.93 to 9.48
SecondaryOpioid Consumption - Part B

Total opioid consumption (OC) converted to an oral morphine equivalent (OME) dose from 0 to 96 hours (OC 0-T96) and 0 to Day 8 (OC 0-D8).

Time frame:
Up to Day 8
Reported as:
Mean · mg morphine equivalents
Opioid Consumption - Part B
mg morphine equivalentsCA-008 (Vocacapsaicin), 24 mgPlacebo
OC 0 to 96 hours27.18 ± 31.6336.56 ± 30.70
OC 0 to Day 829.68 ± 37.6637.81 ± 33.27
Statistical analysis
  • CA-008 (Vocacapsaicin), 24 mg vs Placebo · ANOVA · p = 0.4690 · Mean difference (final values): -9.375 · 95% CI -35.764 to 17.014
  • CA-008 (Vocacapsaicin), 24 mg vs Placebo · ANOVA · p = 0.5811 · Mean difference (final values): -8.125 · 95% CI -38.208 to 21.958

Adverse events

Collected over All AEs were recorded through at least 29 days, and on average 30.8 days, after the completion of surgery.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
CA-008 (Vocacapsaicin), 15 mg - Part A0/10 (0%)0/10 (0%)9/10 (90%)
CA-008 (Vocacapsaicin), 24 mg - Part B0/12 (0%)0/12 (0%)10/12 (83.3%)
Placebo - Part B0/12 (0%)0/12 (0%)10/12 (83.3%)
Most frequent other events
Showing 10 of 25
Most frequent other events
EventCA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part B
ConstipationGastrointestinal disorders6/106/128/12
NauseaGastrointestinal disorders2/104/121/12
TachycardiaCardiac disorders0/103/122/12
HeadacheNervous system disorders2/100/120/12
VomitingGastrointestinal disorders0/102/120/12
Postoperative wound infectionInfections and infestations0/100/122/12
Incision site vesiclesInjury, poisoning and procedural complications0/100/122/12
DizzinessNervous system disorders1/102/121/12
BradycardiaCardiac disorders1/101/120/12
Abdominal discomfortGastrointestinal disorders1/101/121/12

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
<=18 years0000
Between 18 and 65 years10121234
>=65 years0000
Age, Continuous
Age, Continuous(years)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
Mean47.9 ± 10.847.1 ± 10.1642.2 ± 10.1945.6 ± 10.4
Sex: Female, Male
Sex: Female, Male(Participants)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
Female2439
Male88925
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
Hispanic or Latino18615
Not Hispanic or Latino94619
Unknown or Not Reported0000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
American Indian or Alaska Native0000
Asian0000
Native Hawaiian or Other Pacific Islander0000
Black or African American1012
White9121132
More than one race0000
Unknown or Not Reported0000
Region of Enrollment
Region of Enrollment(participants)CA-008 (Vocacapsaicin), 15 mg - Part ACA-008 (Vocacapsaicin), 24 mg - Part BPlacebo - Part BTotal
United States10121234
08

Study locations

1 site
  • First Surgical Hospital
    Houston, Texas 77004, United States
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 14, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04774328
Lead sponsor
Concentric Analgesics
Responsible party
Sponsor
First posted
Mar 1, 2021
Start date
Sep 9, 2020
Primary completion
Jun 15, 2021
Completion
Jun 15, 2021
Results posted
Sep 14, 2022
Last update
Sep 14, 2022

Study contacts

Daneshvari Solanki, MD
principal investigator · First Surgical Hospital

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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