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Safety, Tolerability, and Pharmacokinetics of CSX-1004

A Phase 1a, Randomized, Double-Blind, Placebo-Controlled, Single Site, Single Ascending Dose Study of the Safety, Tolerability, and Pharmacokinetics of CSX-1004 Injection in Healthy Adults

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06005402
Enrollment
32
Registered
2023-08-22
Start date
2023-08-01
Completion date
2024-05-28
Last updated
2024-08-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Opioid Overdose, Opioid Use Disorder

Brief summary

This is a Phase 1a, randomized, double-blind, single ascending dose study, designed to assess the safety, tolerability, and PK of a single CSX-1004 injection, administered by IV infusion across a range of doses in healthy adult subjects. The study will have 3 phases: Screening, Inpatient Treatment, and Outpatient Follow-up. The primary objective of the study is to determine the safety and tolerability of CSX-1004 Injection administered by intravenous (IV) infusion across a range of doses in healthy adult subjects. The secondary objective of the study is to determine the pharmacokinetics (PK) of CSX-1004 Injection administered by IV infusion across a range of doses in healthy adult subjects.

Interventions

BIOLOGICALCSX-1004

Recombinant human immunoglobulin G (IgG) 1λ monoclonal antibody specific for fentanyl and structurally related fentanyl analogs

BIOLOGICALPlacebo

Sterile saline for injection

Sponsors

Dr. Vince Clinical Research
CollaboratorOTHER
Cessation Therapeutics, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Intervention model description

Single ascending dose study

Eligibility

Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
Yes

Inclusion criteria

Major Inclusion Criteria: * Healthy male or female subjects, aged 18 to 50 years, inclusive, * Minimum weight of 50.0 kg and maximum weight of 100.0 kg * Body mass index (BMI) within the range of 18.0 to 32.0 kg/m2, inclusive Major

Exclusion criteria

* Positive UDS for substances of abuse (including alcohol) at Screening or admission to the Treatment Phase * Current daily cigarette smoker within 3 months of Screening. Social smoking, as defined by non-daily use of nicotine-containing products, is permitted. * History or presence of any clinically significant cardiac, psychiatric, endocrine, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, renal, or other major disease or illness at Screening, which in the opinion of the Investigator, might jeopardize the safety of the subject or the validity of the study results.

Design outcomes

Primary

MeasureTime frameDescription
Infusion site examination6 daysInfusion site will be visually inspected for evidence of erythema, edema, itching, pain, infection, bleeding, abnormal healing, and any other abnormalities
Treatment-emergent adverse events (AEs), serious AEs, and AEs leading to discontinuation5 monthsIncidence, intensity, and causality of adverse events
Clinical laboratory assessments5 monthsHematology, biochemistry, and urinalysis
Vital signs5 monthsBlood pressure and pulse rate
12-Lead electrocardiogram5 monthsVariables will include ventricular heart rate and the PR, QRS, QT, QTcB and QTcF intervals
Physical examination5 monthsComplete physical examination, assessing the subject's overall health and physical condition

Secondary

MeasureTime frameDescription
Cmax4 monthsMaximum serum concentration
AUCinf4 monthsArea under the curve from time zero extrapolated to infinity
AUClast4 monthsArea under the curve from time zero to the last measurable concentration
Tmax4 monthsTime to maximum serum concentration
t1/24 monthsbeta terminal elimination half-life

Other

MeasureTime frameDescription
Immunogenicity4 monthsProportions of subjects who are positive (above the limits of quantitation) and negative (below the limits of quantitation) for anti-CSX-1004 antibodies

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026