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Trial registered on ANZCTR
Registration number
ACTRN12620001292965
Ethics application status
Approved
Date submitted
8/06/2020
Date registered
30/11/2020
Date last updated
12/10/2021
Date data sharing statement initially provided
30/11/2020
Date results information initially provided
12/10/2021
Type of registration
Retrospectively registered
Titles & IDs
Public title
A Trial in Healthy Participants to Evaluate the Pharmacokinetics, Safety, Tolerability and Food Effects of PRAX-562
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Scientific title
A Phase 1, Randomized, Double-blind, Placebo-controlled Trial to Evaluate the Safety, Tolerability and Pharmacokinetics of Single and Multiple Ascending Doses and Food Effect of PRAX-562 in Healthy Volunteers
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Secondary ID [1]
301309
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PRAX-562-101
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Epilepsy
317494
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Condition category
Condition code
Neurological
315595
315595
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0
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Epilepsy
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Participants will be confined at the site during the dosing period where dosing will be done via direct supervision and they can only participate in one of the following parts:
- Part A (oral capsule; screening/ baseline period of up to 28 days with total duration up to 39 days): single ascending doses of PRAX-562 between 2.5 mg and 90 mg (increases of no more than 3 times the previous dose will be based on safety and tolerability at each dose level) or placebo (Day 1) administered under fasting conditions
- Part B (oral capsule; screening/ baseline period of up to 28 days with total duration up to 47 days): single daily doses of up to 90 mg PRAX-562* or placebo (Day 1-14) administered under fasting conditions
- Part C (oral capsule; screening/ baseline period of up to 28 days with total duration up to 50 days): up to 90 mg PRAX-562* (Day 1 and 8) both fasted (no food or drink, except water, for at least 10 hours prior to dosing) and fed (30 minutes after a high-fat, high-calorie meal where approximately 50% of the calories will be from fat) in a randomized order
*Exact dose of PRAX-562 for Parts B and C will be based on safety, tolerability and PK data from Part A
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Intervention code [1]
317609
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Treatment: Drugs
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Comparator / control treatment
Placebo capsules (microcrystalline cellulose capsule that is the same as PRAX-562 without the active ingredient) in Parts A and B only
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Control group
Placebo
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Outcomes
Primary outcome [1]
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Part A and B: Safety and tolerability of PRAX-562 will be assessed as a composite endpoint through an integrated analysis of the following: patient and clinician-reported adverse events, vital signs, clinical laboratory results (chemistry, haematology, urinalysis), electrocardiogram (ECG), and Columbia-Suicide Severity Rating Scale (C-SSRS)
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Assessment method [1]
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Timepoint [1]
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Part A: Baseline, Day -1 to Day 6 (daily), Day 9 Part B: Baseline, Day -1 to Day 19 (daily), Day 24. This change was made after enrolment of 88 participants.
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Primary outcome [2]
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Part C: The effects of food on pharmacokinetics will be performed by LC/MS quantification of PRAX-562 levels in plasma. Parameters include plasma concentrations and accumulation ratios (Cmax, tmax, AUC)
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Assessment method [2]
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Timepoint [2]
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Part C: predose and 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 and 120 hours post dose.
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Secondary outcome [1]
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Pharmacokinetics will be performed by LC/MS quantification of PRAX-562 levels in plasma. Parameters include plasma concentrations and accumulation ratios (Cmax, tmax, AUC, t1/2).
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Assessment method [1]
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Timepoint [1]
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Part A: predose and 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 and 120 hours post dose.
Part B: 1: predose and 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36, 48, 72, 96 and 120 hours post dose.
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Secondary outcome [2]
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Part C: Safety and tolerability of PRAX-562 will be assessed as a composite endpoint through an integrated analysis of the following: patient and clinician-reported adverse events, vital signs, clinical laboratory results (chemistry, haematology, urinalysis), electrocardiogram (ECG), and Columbia-Suicide Severity Rating Scale (C-SSRS)
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Assessment method [2]
383004
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Timepoint [2]
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Part C: Baseline, Day -1 to Day 13 (daily), Day 17
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Eligibility
Key inclusion criteria
- Female or male and between the ages of 18 and 55 years, inclusive.
- Weight of at least 50 kg with body mass index (BMI) between 18 and 30 kg/m2 (inclusive).
- Medically healthy (without significant medical issues, e.g. high blood pressure)
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Minimum age
18
Years
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Maximum age
55
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
- Ongoing or history of any psychiatric, medical or surgical condition that might jeopardize the participant’s safety or interfere with the absorption, distribution, metabolism or excretion of the study drug.
- Any abnormal ECG findings, laboratory value or physical examination findings
- Positive ethanol, drug screen or cotinine test
- Use of systemic prescription medications or over-the-counter (OTC) medication, including multivitamins, and dietary and herbal supplement within 2 weeks
- Use of any experimental or investigational drug or device within 30 days
- Donation or loss of 400 mL or more of blood within 8 weeks and/or donation of plasma within 7 days
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
Phase 1
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Date of first participant enrolment
Anticipated
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Actual
19/06/2020
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Date of last participant enrolment
Anticipated
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Actual
8/07/2021
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Date of last data collection
Anticipated
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Actual
28/07/2021
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Sample size
Target
120
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Accrual to date
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Final
112
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Recruitment in Australia
Recruitment state(s)
SA
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Funding & Sponsors
Funding source category [1]
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Commercial sector/Industry
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Name [1]
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Praxis Precision Medicines
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Address [1]
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One Broadway, 16th Floor
Cambridge, MA 02142
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Country [1]
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United States of America
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Primary sponsor type
Commercial sector/Industry
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Name
Praxis Precision Medicines
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Address
One Broadway, 16th Floor
Cambridge, MA 02142
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Country
United States of America
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
306176
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Country [1]
306176
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
306021
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Bellberry Human Research Ethics Committees
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Ethics committee address [1]
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123 Glen Osmond Rd
Eastwood SA 5063
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Ethics committee country [1]
306021
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Australia
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Date submitted for ethics approval [1]
306021
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08/04/2020
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Approval date [1]
306021
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08/06/2020
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Ethics approval number [1]
306021
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Summary
Brief summary
This clinical trial is to evaluate the PK, safety, tolerability and food effects of PRAX-562 in healthy participants aged 18 to 55 years inclusive.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Prof Sepehr Shakib
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Address
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Department of Clinical Pharmacology
8F411
Royal Adelaide Hospital
North Terrace, ADELAIDE, South Australia, 5000
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Country
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Australia
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Phone
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+61 0411100278
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Dr Bernard Ravina
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Address
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Praxis Precision Medicines
One Broadway, 16th Floor
Cambridge, MA 02142
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Country
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United States of America
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Phone
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+1 617 300 8460
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Bernard Ravina
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Address
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Praxis Precision Medicines
One Broadway, 16th Floor
Cambridge, MA 02142
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Country
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United States of America
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Phone
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+1 617 300 8460
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Fax
102448
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Email
102448
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
Individual participant data will not be shared
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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