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UnknownPhase 1 / PHASE2

Evaluation of Tolfenamic Acid in Individuals With PSP at 12-Weeks

A Phase 2a Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety and Efficacy of Tolfenamic Acid for the Treatment of Progressive Supranuclear Palsy

Lead sponsor

NeuroTau, Inc.

Asset

Tolfenamic Acid

Listed sites

1

Recruiting sites

-

Enrollment

24

estimated

Study population

Frontotemporal dementia

Key I/E criteria

•MMSE ≥15•Study partner/caregiver required•MRI contraindications excluded

Primary endpoint

•Safety and tolerance of tolfenamic acid

Footprint

Where this trial recruits

Site locations as reported to ClinicalTrials.gov. Site count is not enrollment count; per-site enrollment is not available from source.

Identifiers

Registered as

NCT IDNCT04253132
Org study IDNT 101-201

Timeline

Milestones

Study first posted2020-02-05actual
Last update posted2020-02-05actual
Study start2021-01-01estimated
Primary completion2022-12-31estimated
Study completion2022-12-31estimated

Assets

Drug assets

Tolfenamic Acid

Study populations

Who this study enrolls

Frontotemporal dementia

Eligibility

Who can enroll

Minimum age40 Years
Maximum age85 Years
SexAll
Healthy volunteersNot accepted

Inclusion criteria

•Subjects may be included in the study only if they meet all of the following criteria:
-Probable or possible progressive supranuclear palsy defined as:
-At least a 12-month history of postural instability or falls during the first 3 years that symptoms are present; and
-At screening (Visit 1), a decreased downward saccade velocity defined as observable eye movement (deviation from the "main sequence" linear relationship between saccade amplitude and saccade velocity), or supranuclear ophthalmoplegia defined as 50% reduction in upward gaze or 30% reduction in downward gaze; and
-Age at symptom onset of 40 to 85 years by history; and
-An akinetic-rigid syndrome with prominent axial rigidity.
-Aged 41 to 85 years at the time of screening (Visit 1).
-Judged by investigator to be able to comply with neuropsychological evaluation at baseline and throughout the study.
-Must have reliable caregiver accompany subject to all study visits. Caregiver must read, understand, and speak local language fluently to ensure comprehension of informed consent form and informant-based assessments of subject. Caregiver must also have frequent contact with subject (at least 3 hours per week at one time or at different times) and be willing to monitor study medication compliance and the subject's health and concomitant medications throughout the study.
-Modified Hachinski score ≤ 3. This modified Hachinski will not include the focal neurological signs, symptoms or pseuodobulbar affect questions, given the prominence of all 3 in PSP.
-Score ≥ 15 on the Mini-Mental State Examination (MMSE) at screening (Visit 1).
-Written informed consent provided by subject (or legally-appointed representative, as appropriate) and caregiver (if not the legally-appointed representative) who are both fluent local language speakers.
-Subject resides outside a skilled nursing facility or dementia care facility at the time of screening (Visit 1), and admission to such a facility is not planned. Residence in an assisted living facility is allowed.
-If the subject is receiving levodopa/carbidopa, levodopa/benserazide, a dopamine agonist, catechol-o- methyltransferase (COMT) inhibitor, or other Parkinson's medication with the exception of Azilect (rasagiline), the dose must have been stable for at least 60 days prior to the screening visit (Visit 1) and must remain stable for the duration of the study. No such medication can be initiated during the study. Subjects receiving rasagiline or CoQ10 must be on a stable dose for at least 90 days prior to the screening visit (Visit 1).
-Able to tolerate the MRI scan during screening with either no sedation or low dose lorazepam..
-Able to ambulate independently or with assistance defined as the ability to take at least 5 steps with a walker (guarding is allowed provided there is no contact) or the ability to take at least 5 steps with the assistance of another person who can only have contact with one upper extremity.
-Presence of symptoms for less than 5 years or the presence of symptoms for more than 5 years with a PSPRS baseline score ≥ 40.
-Stable on other chronic medications for at least 30 days prior to screening

Exclusion criteria

•Subjects will be excluded from the study for any of the following reasons:
-Insufficient fluency in local language to complete neuropsychological and functional assessments.
-A diagnosis of Amyotrophic Lateral Sclerosis (ALS) or other motor neuron disease.
-Any of the following:
-Abrupt onset of symptoms defined in inclusion criteria 1 associated with ictal events,
-Head trauma related to onset of symptoms defined in inclusion criteria 1,
-Severe amnesia within 6 months of the symptoms defined in inclusion criteria 1,
-Cerebellar ataxia,
-Choreoathetosis,
-Early, symptomatic autonomic dysfunction, or
-Tremor while at rest.
-Presence of other significant neurological or psychiatric disorders including (but not limited to) Alzheimer's disease; dementia with Lewy bodies; prion disease; Parkinson's disease (which has not subsequently been revised to PSP), any psychotic disorder; severe bipolar or unipolar depression; seizure disorder; tumor or other space-occupying lesion; or history of stroke or head injury with loss of consciousness for at least 15 minutes within the past 20 years.
-Within 4 weeks of screening (Visit 1) or during the course of the study, concurrent treatment with memantine; acetylcholinesterase inhibitors; antipsychotic agents (other than quetiapine) or mood stabilizers (e.g., valproate, lithium); or benzodiazepines (except as below).
-Low dose lorazepam (not more than 2 mg) may be used for sedation prior to MRI scans for those subjects requiring sedation. Neuropsychological testing may not be performed after lorazepam administration.
-Subjects who take short acting benzodiazepines (only temazepam or zolpidem are allowed) for sleep may continue to do so if they have been on a stable dose for 30 days prior to screening.
-Clonazepam may be used for treatment of dystonia or painful rigidity associated with PSP if the dose has been stable for 90 days prior to screening and is not expected to change during the course of the study.
-Treatment with lithium, methylene blue, tramiprosate, ketone bodies, latrepirdine, or any putative disease-modifying agent directed at tau within 90 days of screening (Visit 1).
-A history of alcohol or substance abuse within 1 year prior to screening (Visit 1) and deemed to be clinically significant by the site investigator.
-Any malignancy (other than non-metastatic dermatological conditions) within 5 years of the screening visit (Visit 1) or current clinically significant hematological, endocrine, cardiovascular, renal, hepatic, gastrointestinal, or neurological disease. For the non-cancer conditions, if the condition has been stable for at least the one year before the screening visit (Visit 1) and is judged by the site investigator not to interfere with the subject's participation in the study, the subject may be included.
-Clinically significant laboratory abnormalities at screening(Visit 1), including creatinine ≥ 2.5 mg/dL, alanine aminotransferase (ALT) or aspartate aminotransferase (AST) ≥ 3 times the upper limit of the normal reference range, vitamin B12 below the laboratory normal reference range, or thyroid stimulating hormone (TSH) above the laboratory normal reference range.
-The systolic blood pressure measurement is > 190 or < 85 mm Hg. The diastolic blood pressure measurement is 105 or < 50 mm Hg at screening (Visit 1).
-Abnormal ECG tracing at screening (Visit 1) and judged to be clinically significant by the site investigator.
-Treatment with any investigational drugs or device within 90 days of screening (Visit 1).
-Known history of serum or plasma progranulin level less than one standard deviation below the normal subject mean for the laboratory performing the assay.
-Known presence of known disease-associated mutation in TDP-43, PGRN, CHMPB2 or VCP genes or any other frontotemporal lobar degeneration (FTLD) causative genes not associated with underlying tau pathology (e.g., Chromosome 9 associated FTD).
-History of deep brain stimulator surgery other than sham surgery for deep brain stimulation (DBS) clinical trial.
-History of early, prominent rapid eye movement (REM) sleep behavior disorder.
-Women who are pregnant or lactating and women of childbearing potential who are not using at least two different forms of medically recognized and highly effective methods of birth control, resulting in a low failure rate when used consistently and correctly such as implants, injectables, combined oral contraceptives, some IUDs, sexual abstinence or vasectomised partner.
-An employee or relative of an employee of the Sponsor, a clinical site, or contract research organization (CRO) participating in the study.
-Significant anatomical nasal abnormality (e.g., septal deviation obstructing airflow to at least one nostril or septal perforation) or history of nasal turbinate surgery.
-History of a clinically significant medical condition that would interfere with the subject's ability to comply with study instructions, would place the subject at increased risk, or might confound the interpretation of the study results.
-Contraindication to the MRI examination for any reason (e.g., severe claustrophobia, ferromagnetic metal in body).
-Structural abnormality on the MRI that precludes diagnosis of PSP, such as cortical infarct in brain region that might account for subject's symptoms.
-In subjects receiving anti-Parkinson's Disease medication at the time of screening (Visit 1), in the opinion of the investigator substantial worsening of motor signs or symptoms compared with normal functioning following overnight withdrawal of the anti-Parkinson medication

Endpoints (18)

What's being measured

Protocol endpoints and posted registry outcome measures, grouped into outcome categories. Composite endpoints show their component event types. Standard codes (LOINC, SNOMED CT) are shown where available.

Coverage by outcome category

Other (unclassified)
4
Amyloid biomarkers
2
Tau biomarkers
2
Neurodegeneration biomarkers
2
Fluid / digital biomarkers
2
Other clinical outcomes
2
Global cognition
1
Function / daily living
1
Behavior / neuropsychiatric
1
Safety / tolerability / PK
1

Global cognition

1 endpoint
Other/protocol endpoint

Repeatable Battery for the Assessment of Neuropsychological Status (RBANS)

Time frame:12-weeks

change from baseline, improvement

Function / daily living

1 endpoint
Other/protocol endpoint

Schwab and England Activities of Daily Living Scale (SEADL)

Time frame:12-weeks

change from baseline, improvement

Behavior / neuropsychiatric

1 endpoint
Other/protocol endpoint

Geriatric Depression Scale (GDS)

Time frame:12-weeks

change from baseline, improvement

Amyloid biomarkers

2 endpoints
Secondary/protocol endpoint

CSF biomarker change from baseline

Time frame:12-weeks

Neurofilament light (NfL)

change from baseline, improvement

Secondary/protocol endpoint

Pharmacodynamic parameter of amyloid beta peptide

Time frame:12-weeks

concentration, descriptive

Tau biomarkers

2 endpoints
Secondary/protocol endpoint

Pharmacodynamic parameter of total tau

Time frame:12-weeks

ratio, descriptive

Secondary/protocol endpoint

Pharmacodynamic parameter of phosphorylated tau

Time frame:12-weeks

concentration, descriptive

Neurodegeneration biomarkers

2 endpoints
Secondary/protocol endpoint

Pharmacodynamic parameter of NFL

Time frame:12-weeks

Neurofilament light (NfL)

concentration, descriptive

Other/protocol endpoint

Plasma biomarkers

Time frame:12-weeks

Neurofilament light (NfL)

descriptive

Fluid / digital biomarkers

2 endpoints
Secondary/protocol endpoint

Pharmacodynamic parameter of ngrn

Time frame:12-weeks

concentration, descriptive

Secondary/protocol endpoint

Pharmacodynamic parameter of pNFH

Time frame:12-weeks

concentration, descriptive

Safety / tolerability / PK

1 endpoint
Primary/protocol endpoint

Safety and tolerance of tolfenamic acid in individuals with PSP

Time frame:12-weeks

event count, event

Other clinical outcomes

2 endpoints
Other/protocol endpoint

Clinical global Impression of Change

Time frame:12-weeks

descriptive

Other/protocol endpoint

Clinical Global Impression of Disease Severity (CGI-ds)

Time frame:12-weeks

change from baseline, improvement

Other (unclassified)

4 endpoints
Other/protocol endpoint/low confidence

Progressive Supranuclear Pallsy Rating Scale (PSPRS)

Time frame:12-weeks

change from baseline, improvement

Other/protocol endpoint/low confidence

Phonemic Fluency

Time frame:12-weeks

change from baseline, improvement

Other/protocol endpoint/low confidence

Color Trails Test

Time frame:12-weeks

change from baseline, improvement

Other/protocol endpoint/low confidence

Letter-number sequencing

Time frame:12-weeks

change from baseline, improvement

Provenance

Sources

Trial identity, design, statusClinicalTrials.gov API v2
Snapshot dateJuly 21, 2026
Endpoint classificationDelfa ADRD endpoint taxonomy
Results tableno registry results posted yet

Trial facts come from public ClinicalTrials.gov records. Endpoint categories are Delfa's classification of those records, not a ClinicalTrials.gov field. All figures reflect the July 21, 2026 snapshot.