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Assess the Effect of Metaxalone 640 mg (M640) Compared to Tizanidine 8 mg on Truck Driving Ability and Cognition

Assessment of the Effect of Metaxalone 640 mg (M640) on Truck Driving Ability and Cognition Compared to Tizanidine 8 mg: A Prospective, Single-blind, Within-subject Pilot Study

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06382662
Enrollment
20
Registered
2024-04-24
Start date
2024-04-29
Completion date
2025-03-06
Last updated
2026-09-11

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

Conditions

Cognitive Impairment

Keywords

Impaired driving

Brief summary

Every participant will receive active study drug and one (1 )comparator, in two (2) stages, one after the other. Each drug will be taken one (1) time after a high fat meal. Vital signs and discussion of medications, illness or injury are considered safety assessments and will be discussed at every visit. There will be ( four (4) visits.

Detailed description

Every participant will receive active study drug and one (1) comparator in two (2) stages, one after the other. Each drug will be taken one (1) time after a high fat meal. Vital signs and discussion of medications, illness or injury are considered safety assessments and will be discussed at every visit. The Screening Visit will be followed by the Baseline (Visit 1) 1-14 days later. At the Baseline Visit participants will be given written tests to measure thinking process. You will also be asked to take a computer driving simulation test. Visits 2 and 3 approximately one (1) week apart will be the dosing days after eating a high fat meal within 30 minutes. The testing from the Baseline Visit will be repeated at four (4) hours and 1.5 hours after dosing with comparator drug. The End of Study safety visit will take place two (2) weeks later. Participants will be given discharge instructions.

Interventions

DRUGmetaxalone m640 mg

A single dose of micronize metaxalone 640 mg

DRUGtizanidine 8mg

A single dose of tizanidine 8 mg

Sponsors

Primus Pharmaceuticals
Lead SponsorINDUSTRY
Sun Valley Arthritis Center
CollaboratorUNKNOWN

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Subject)

Intervention model description

This is a prospective, randomized, single-blind, pilot study to assess degree of drowsiness, cognition, and driving risk following a single dose of oral metaxalone 640 mg (M640) compared to tizanidine 8 mg in healthy subjects.

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes

Inclusion criteria

* equal to or greater than 18 years old * equal to or less than 65 years old * weight at least 120 pounds * medically healthy * able to eat a high fat meal

Exclusion criteria

* medications known to affect sleep-wake cycle * current use of cimetidine * current use of certain anti-depressants * current use of certain antibiotics * positive urine drug test for mind altering medications

Design outcomes

Primary

MeasureTime frameDescription
Change From Baseline, Standard Deviation of Lateral Position, no Trafficthirty minutesUsing the One Motion GT Elite Mini- Simulator (SimGear) with Carnet Soft Driving Simulation Software
Change From Baseline, Standard Deviation of Lateral Position, Oncoming Trafficthirty minutesUsing the One Motion GT Elite Mini- Simulator (SimGear) with Carnet Soft Driving Simulation Software
Change From Baseline, Standard Deviation of Lateral Position, Oncoming Traffic Plus Lead Vehiclethirty minutesUsing the One Motion GT Elite Mini- Simulator (SimGear) with Carnet Soft Driving Simulation Software

Countries

United States

Contacts

STUDY_DIRECTORJ C Lukban, DO

Primus Pharmaceuticals

Baseline characteristics

Characteristic
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
0 Participants
Age, Categorical
Between 18 and 65 years
20 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
1 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
19 Participants
Region of Enrollment
United States
9 participants
Sex: Female, Male
Female
10 Participants
Sex: Female, Male
Male
6 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 200 / 20
other
Total, other adverse events
0 / 200 / 20
serious
Total, serious adverse events
0 / 200 / 20

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 12, 2026