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Single-Site Study of Naltrexone/Acetaminophen for the Acute Treatment of Migraine: A Phase 2 Randomized Trial

Safety and Efficacy of Naltrexone/Acetaminophen for the Acute Treatment of Migraine: A Single-Site, Phase 2 Randomized Trial

Status
Withdrawn
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05685225
Acronym
AT-06
Enrollment
0
Registered
2023-01-17
Start date
2025-01-31
Completion date
2025-12-02
Last updated
2025-12-08

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

Conditions

Migraine

Keywords

Naltrexone, Acetaminophen, Acute migraine, Low-dose naltrexone, Anxiety

Brief summary

* This two-stage clinical trial will assess a novel combination therapy for acute migraine. In Stage 1 (factorial), participants will receive the combination, each individual component, or placebo. In Stage 2 (dose-finding), they will test three doses of the combination. Before both stages, participants will complete a run-in period, documenting a migraine attack without study medication. They will then treat one migraine attack in each stage. * 4 visits * Requirements: Migraine Diagnosis. BMI below 34. Read, write, and speak English. No opioids, marijuana, benzodiazepines, or excessive alcohol.

Detailed description

This study evaluating naltrexone-acetaminophen in the acute treatment of migraine.

Interventions

DRUGStage 1: Naltrexone/Acetaminophen

Combination

DRUGStage 1: Naltrexone

Naltrexone alone

DRUGStage 1: Acetaminophen

Acetaminophen alone

DRUGStage1: Placebo

Matching placebo

DRUGStage 2: Naltrxone/Acetaminophen high dose

Combination high dose

DRUGStage 2: Naltrexone/Acetaminophen medium dose

Combination medium dose

DRUGStage 2: Naltrxone/Acetaminophen low dose

Combination low dose

DRUGStage 2: Placebo

Matching Placebo

Sponsors

Allodynic Therapeutics, Inc
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Intervention model description

Randomized, Double-Blind, Placebo-Controlled, Parallel-Group

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

1. Ages 18 to 75 years, inclusive. 2. At least 1-year of history of migraine with or without aura as defined by the International Classification of Headache Disorders 3rd edition 17 (ICHD-3). 3. Migraine onset before age 50 years. 4. Read, write, and speak English 5. BMI Higher than 20 and Lower than 34 6. The female subject who is premenopausal or postmenopausal less than one year or have not had surgical sterilization (i.e., tubal ligation, partial or complete hysterectomy) must have a negative urine pregnancy test, be non-lactating, and commit to using two methods of adequate and reliable contraception throughout the study and for 28 days after taking the last dose of the study medication (e.g., barrier with an additional spermicidal, intra- uterine device, hormonal contraception). Male subjects must be surgically sterile (the procedure occurred greater than 6 months before the Screening Visit) or commit to using two different birth control methods during the study and for 28 days after the last dose of the study medication.

Exclusion criteria

1. Pregnant or nursing women or those planning a pregnancy. 2. Used opioids (including methadone and buprenorphine), barbiturate-containing medications, muscle relaxants, or benzodiazepines within 3 months prior to screening. 3. Used any recreational drugs in the past 3 months. 4. Use of medications to treat headaches more than 10 days per month in the past 3 months or use of any pain medication for other pain syndromes for more than 10 days per month. 5. Uncontrolled cardiovascular or cerebrovascular disease or a history of heart failure, atrial fibrillation, or myocardial infarction. 6. Uncontrolled hypertension (systolic/diastolic blood pressure ˃ 140/90 mmHg) or diabetes. 7. Immediate family members or same household members participating in the study. 8. Site personnel, their friends, and family. 9. Abnormal laboratory or ECG results. 1. Aspartate transaminase (AST/SGOT), alanine transaminase (ALT/SGPT), or alkaline Phosphatase ≥ 1.5 x Upper Limit of Normal (ULN). creatinine ≥ 1.5 x ULN. 2. BBB or intraventricular conduction defect with a QRS duration ≥ 150 msec. ST-T wave abnormalities. 3. Hemoglobin \< 10 g/dL 4. Neutrophil count ≤ 1000/μL 5. Cholesterol ≥ 300 mg/dL 6. Triglycerides ≥ 500 mg/dL Additional

Design outcomes

Primary

MeasureTime frameDescription
Proportion of subjects with acute migraine who achieved freedom from pain after dosing2 hours after dosingFreedom from pain is defined as the absence of headache pain from moderate or severe pain at baseline, without the use of rescue medication. The pain is measured on a 4-point scale, with 0 indicating no pain, 1 for mild pain, 2 for moderate pain, and 3 for severe pain.
Proportion of subjects with acute migraine who achieved freedom from migraine's Most Bothersome Symptoms (MBS) after dosing2 hours after dosingMBS freedom is defined as the absence of the identified Most Bothersome Symptom (MBS), which can be nausea, photophobia, or phonophobia. The MBS is measured on a binary scale, either absent or present.

Secondary

MeasureTime frameDescription
Proportion of subjects with acute migraine who achieved sustained pain relief from 2 to 24 hours2 to 24 hoursSustained pain relief is defined as the reduction of headache pain severity from moderate or severe intensity to mild without the use of rescue medication.
Functional disability at 2 hours2 hours after dosingFunctional disability refers to the inability to perform activities of daily living or work tasks to a normal level due to physical, mental, or sensory impairments. It is measured on a scale of 0 to 3, where 0 indicates normal function and 3 indicates the need for bedrest due to severe impairment.
Functional disability at 24 hours24 hours after dosingFunctional disability refers to the inability to perform activities of daily living or work tasks to a normal level due to physical, mental, or sensory impairments. It is measured on a scale of 0 to 3, where 0 indicates normal function and 3 indicates the need for bedrest due to severe impairment.
Use of rescue medications within 24 hourswithin 24 hoursRescue medication use refers to the use of an additional medication to treat the current migraine.
Pain relapse within 48 hourswithin 48 hoursPain relapse refers to the reappearance of headache pain of any severity when the subject had been free of pain 2 hours after dosing.
Proportion of subjects with acute migraine who achieved pain relief2 hours after dosingPain relief is defined as a reduction in headache pain severity from moderate or severe to mild or no headache pain.
Proportion of subjects with acute migraine who achieved freedom from photophobia2 hours after dosingFreedom from photophobia is defined as absence of photophobia
Proportion of subjects with acute migraine who achieved freedom from phonophobia2 hours after dosingFreedom from phonophobia is defined as absence of phonophobia
Proportion of subjects with acute migraine who achieved freedom from nausea2 hours after dosingFreedom from nausea is defined as absence of nausea
The proportion of subjects with acute migraine who achieved sustained pain freedom from 2 to 24 hours2 to 24 hoursSustained pain freedom is defined as the absence of any headache pain of any intensity without the use of rescue medication.

Other

MeasureTime frameDescription
Self-reported tense feelings score2 hours after dosingSelf-reported tense feelings on a 4-point scale: (0=Not at all, 1=Slightly, 2=Moderate, 3=Extremely).
Self-reported hurt feelings score2 hours after dosingSelf-reported hurt feelings on a 4-point scale: (0=Not at all, 1=Slightly, 2=Moderate, 3=Extremely).
Hamilton Anxiety Rating Scale scoreBaseline (Randomization Visit) to 2 hours after dosingThe Hamilton Anxiety Rating Scale is a validated assessment tool for measuring anxiety symptoms. The scale consists of fourteen items designed to assess the severity of anxiety on a scale of zero to four, with four being the most severe.
Self-reported overall sense of wellbeing2 hours after dosingSelf-reported overall sense of wellbeing (physical and emotional) is a subjective measurement that reflects an individual's perception of their physical and emotional health. It is typically assessed on a 4-point scale, ranging from 0 (Poor) to 3 (Superb), with 1 (Okay) and 2 (Good) representing intermediate levels of wellbeing. This measurement considers factors such as physical pain, positive emotions, life satisfaction, stress management, and the absence of negative emotions like depression and anxiety.

Countries

United States

Outcome results

None listed

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