PRAX-944 for Essential Tremor (Essential1 Trial)

Phase 2

Waitlist Available

Research Sponsored by Praxis Precision Medicines

Eligibility Criteria Checklist

Specific guidelines that determine who can or cannot participate in a clinical trial

Must have

Be older than 18 years old

Timeline

Screening 3 weeks

Treatment Varies

Follow Up 56 days

Summary

This trial is testing PRAX 944, a new medication, to see if it can help people with Essential Tremor, a condition that causes uncontrollable shaking. The study includes adults who have had this condition for a significant period. Researchers want to find out if PRAX 944 can reduce the symptoms by affecting certain brain pathways involved in movement.

Eligible Conditions

Essential Tremor

Timeline

Screening ~ 3 weeks3 visits

Treatment ~ Varies

Follow Up ~ 56 days

Screening ~ 3 weeks

Treatment ~ Varies

Follow Up ~56 days

This trial's timeline: 3 weeks for screening, Varies for treatment, and 56 days for reporting.

Treatment Details

Study Objectives

Study objectives can provide a clearer picture of what you can expect from a treatment.

Primary study objectives

Change from baseline to Day 56 on the modified ADL

Secondary study objectives

CGI-I scores at Days 14, 28, and 42

Change from baseline to Day 42 on the TETRAS-PS total score

Change from baseline to Day 56 on the Clinical Global Impression-Severity (CGI-S)

+13 more

Other study objectives

Incidence of AEs by preferred term

Trial Design

3Treatment groups

Experimental Treatment

Placebo Group

Group I: Regimen 2Experimental Treatment4 Interventions

Double-blind Part: Oral dosing, once daily in the morning with titration over 56 days to 60 mg PRAX-944: 7 days of 5 mg, 7 days of 10 mg, 7 days of 20 mg, 7 days of 40 mg, 28 days of 60 mg Extension Part: Double-blind Lead-in: Oral dosing, once daily in the morning with titration over 43 days to 100 mg PRAX-944: 7 days of 80 mg, 36 days of 100 mg Extension Part: Open-label Flexible PRAX-944 Dosing: Oral dosing, once daily in the morning of 20 mg to 100 mg PRAX-944 for 469 days Crossover Part: Following double-blind lead-in/open-label: 1:1 randomization to placebo or stable dose of PRAX-944 for 21 days followed by cross-over to either placebo or PRAX-944 oral dosing, once daily in the morning with titration over 7 days (3 days at 20 mg, 4 days at 40 mg) to 60 mg (14 days) before returning to open-label part.

Group II: Regimen 1Experimental Treatment4 Interventions

Double-blind Part: Oral dosing, once daily in the morning with titration over 56 days to 100 mg PRAX-944: 7 days of 5 mg, 7 days of 10 mg, 7 days of 20 mg, 7 days of 40 mg, 7 days of 60 mg, 7 days of 80 mg, 14 days of 100 mg Extension Part: Double-blind Lead-in: Oral dosing, once daily in the morning over 43 days: 100 mg PRAX-944 Extension Part: Open-label Flexible PRAX-944 Dosing: Oral dosing, once daily in the morning of 20 mg to 100 mg PRAX-944 for 469 days Crossover Part: Following double-blind lead-in/open-label: 1:1 randomization to placebo or stable dose of PRAX-944 for 21 days followed by cross-over to either placebo or PRAX-944 oral dosing, once daily in the morning with titration over 7 days (3 days at 20 mg, 4 days at 40 mg) to 60 mg (14 days) before returning to open-label part.

Group III: Regimen 3Placebo Group4 Interventions

Double-blind Part: Oral dosing, once daily in the morning: 56 days of placebo Extension Part: Double-blind Lead-in: Oral dosing, once daily in the morning with titration over 43 days to 100 mg PRAX-944: 7 days of 5 mg, 7 days of 10 mg, 7 days of 20 mg, 7 days of 40 mg, 7 days of 60 mg, 7 days of 80 mg, 14 days of 100 mg Extension Part: Open-label Flexible PRAX-944 Dosing: Oral dosing, once daily in the morning of 20 mg to 100 mg PRAX-944 for 469 days Crossover Part: Following double-blind lead-in/open-label: 1:1 randomization to placebo or stable dose of PRAX-944 for 21 days followed by cross-over to either placebo or PRAX-944 oral dosing, once daily in the morning with titration over 7 days (3 days at 20 mg, 4 days at 40 mg) to 60 mg (14 days) before returning to open-label part.

Treatment

First Studied

Drug Approval Stage

How many patients have taken this drug

100 mg PRAX-944

2021

Completed Phase 2

~140

60 mg PRAX-944

2021

Completed Phase 2

~140