Study to Assess Drowsiness, Cognition, Fall Risk After Metaxalone 640 mg and Metaxalone 800 mg

NCT ID: NCT06348303

Last Updated: 2025-08-07

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-05-16

Study Completion Date

2024-10-30

Brief Summary

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Every participant will receive Metaxalone in two (2) stages, one week after the other. A single dose of each Metaxalone dose will be taken one (1) time after a high fat meal which must be eaten within 30 minutes. Every participant will be given written tests to measure drowsiness, reaction time and thinking process and will also be asked to take walking tests to assess fall risk. Participation in this study will last approximately 2-4 weeks.

Detailed Description

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The Screening-Baseline Visit will include vital signs and urine testing, and a discussion of medications and current medical history. Participants will be given written tests to measure drowsiness, reaction time and thinking process and will also be asked to take walking tests to assess fall risk.

Visit 2 approximately one to two (1 to 2) week(s) later will be the first dosing day (Arm 1) after eating the high fat meal. The testing from Baseline will be repeated four (4) hours after the medication dose is taken.

Visit 3 approximately one (1) week later will be the second dosing day (Arm 2) after eating the high fat meal. The testing from Baseline will be repeated four (4) hours after the medication dose is taken.

The End of Study safety visit will take place one (1) week after Visit 3 by phone with a discussion of any side effects from the drug, recent medications, and any illness or injury experienced since the previous visit. Participants will be given end of study and discharge instructions.

Conditions

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Healthy Participants

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

Each participant will be enrolled to two (2), single dose, study treatment arms in a crossover design. The treatments will occur consecutively with seven (7) days separating days of dosing.
Primary Study Purpose

PREVENTION

Blinding Strategy

SINGLE

Participants
Single mask of participants. Participants will be prevented from knowing product dose.

Study Groups

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Active 640 mg

Metaxalone (M640) 640 mg tablet, a single-dose at visit 2 of 4 visits.

Group Type ACTIVE_COMPARATOR

Metaxalone m640 mg oral tablet

Intervention Type DRUG

Metaxalone partially micronized 640 mg tablet

Active 800 mg

Metaxalone 800 mg tablet, a single-dose at Visit 3 of 4 visits.

Group Type ACTIVE_COMPARATOR

Metaxalone 800 mg oral tablet

Intervention Type DRUG

Metaxalone non-micronized 800 mg oral tablet

Interventions

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Metaxalone m640 mg oral tablet

Metaxalone partially micronized 640 mg tablet

Intervention Type DRUG

Metaxalone 800 mg oral tablet

Metaxalone non-micronized 800 mg oral tablet

Intervention Type DRUG

Other Intervention Names

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m640 Skelaxin

Eligibility Criteria

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Inclusion Criteria

* Weigh at least 120 pounds at Screening
* Medically healthy with no clinically significant medical co-morbidities impact endpoints

Exclusion Criteria

* Current use of any medications known to affect sleep-wake cycle.
* Known sleep disorder.
* Current use of cimetidine.
* Current use of a monoamine oxidase Inhibitor (MAOI), selective serotonin reuptake inhibitor (SSRI), selective norepinephrine reuptake inhibitor (SNRI), 5- hydroxytryptamine (5-HT) agonist or any drug that has the potential to affect the serotonergic neurotransmitter system (e.g. mirtazapine, trazodone, tramadol).
* Positive urine test for amphetamines, barbiturates, cocaine, opiates, benzodiazepines, or cannabinoids.
* Participants taking skeletal muscle relaxants or sedative hypnotics.
* Participants with gastrointestinal disease affecting absorption.
* Participants with severe hepatic or renal impairment.
Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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ClinOhio Research Services, LLC

INDUSTRY

Sponsor Role collaborator

Primus Pharmaceuticals

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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J Lukban, DO

Role: STUDY_DIRECTOR

Primus Pharmaceuticals, Inc.

Locations

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ClinOhio Research Institute

Columbus, Ohio, United States

Site Status

Countries

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United States

Other Identifiers

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PMMD-01

Identifier Type: -

Identifier Source: org_study_id

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