Clinical trial NCT04167189
Conditions: ADHD
Sponsor: PhenoSolve, LLC
Start date: 2018-01-20; Completion date: 2020-03-30
Enrollment: 28 participants; Allocation: NA; Intervention model: SINGLE_GROUP

Brief summary:
This work will assess the prevalence in hard-to-treat ADHD of the ineffectiveness of the anesthetic Lidocaine.

Detailed description:
Using a non-invasive, pain-free, taste-based approach to assess lidocaine effectiveness, the study will assess the frequency of ineffectiveness in the target population.

Arms: arm 1: Subjects will be tested with lidocaine gel.
Interventions: intervention 1: Lidocaine gel
Intervention descriptions: intervention 1: Septodont 5% oral lidocaine gel (NDC 0362-0221-10), 75 mg

Protocol documents:
Prot_000.pdf: 
TRIAL PROCEDURES 
1. RECRUITMENT 
Advertisements will be done on radio, outbound calls will be made to patients after review of 
records and patients will also be recruited when they come for a regular visit and are waiting in the 
waiting room. 
2. SCREENING: TELEPHONE ELIGIBILITY INTERVIEW 
A call will be made to recruit subjects and confirm, followed by scheduling the one-time research 
testing. The caller will use the Eligibility Telephone Questionnaire. 
3. VISIT 
A.  OVERVIEW 
Enrollment and eligibility determination will be done prior to or during the visit.  
B. ENROLLMENT & CONSENT 
Advertisements will be sent by email to recruit subjects and posters will be displayed in the waiting 
areas. 
The researcher will review with the prospective subject eligibility and demographic information and 
the Eligibility Questionnaire and Demographic Data forms completed.   
After confirming eligibility, the Investigative site will consent/assent the subject prior to any 
procedures, using the Consent/Assent forms and answer any patient questions. 
C. TEST “ADHD-RS”  
The subject does the baseline ADHD-RS test cataloging ADHD symptoms and their impact (using 
the appropriate version by age).  
D. ASSESS “CGI-S” 
The MD gathers the baseline Clinical Global Impression Severity (CGI-S). 
E. RESEARCH QUESTIONNAIRES 
Each subject/family will complete a Research Survey, including questions about sensory 
overstimulation. 
They will also complete a Food and Activity Diary for the day of testing to assess factors affecting 
lidocaine effectiveness.  
F. LIDOCAINE TESTING 
The Lidocaine tester will apply lidocaine to the tongue and test for numbness, using the pain-free 
taste tests.   
Lidocaine: we will use Septodont 5% oral lidocaine gel (NDC 0362-0221-10).   


The taste solutions will be identical in appearance and odorless, and prepared in 7 one-use vials, 2 
with 25% sodium chloride by weight (25 grams NaCl: 75 ml water), 2 with 60% sucrose by weight 
(60 grams sucrose: 40 ml water), and 2 with just water and one surprise container containing one of 
the three, to prevent guessing post-lidocaine. Only purified water will be used.   
The order of testing the three tastes will be randomized, each will be labeled with a one-time code, 
prepared by a certified research compounding pharmacy or manufacturer; the labeling will be 
blinded such that neither the administrator of the test nor the subject will know in advance of the 
application which taste is in which bottle. 
 
The following diagram shows where the tastants and gel should be applied. 
 
The testing will be performed in a calm setting.  
Step 1:  Tastants pre-gel 
• Before application of the gel, one taste solution will be rubbed across the tongue using a 
swab, being careful to cover the middle section of the tongue and rub the swab back and 
forth and to avoid the edges, per the diagram above. 
• The subject asked to describe the taste, if any, and its intensity on a scale from 0 (none) to 10 
(very intense).  We will use a card with sugar, salt, and water and a 10-point scale for 
intensity to prompt the subject 


• For assessing the taste intensity, subjects will be told if they are “guessing” to mark the 
intensity as no more than zero or one.  Only if they are sure what the tastant is, should the 
intensity be > 1.   
• Pre-testing:  do 1 each, water, salt, sugar  
• Rinse between flavors in pre-test and spit out water 
The procedure will be repeated with a second swab with a different tastant, and again with a third 
swab and the final tastant.  
To assist the subject, after the application of each taste the researcher will show them this Oral 
Lidocaine Tastant Card. 
  
Step 2:  The lidocaine gel will be rubbed onto the surface and sides of the front half of the tongue 
using a swab.  We will use blister packs of the lidocaine to increase the consistency of dosing.  
• Dry tongue before applying lidocaine  
• “Use all the gel in the blister pack” to standardize dose.  (We will adjust quantity in blister 
to 0.75g of Septodont) 
• Provide each subject a paper cup and a towel during the 2-minute wait post lidocaine to 
catch drool.   


• There will be no rinsing during the two minutes. 
Step 3:  Two minutes after application of lidocaine, the taste assessment is repeated.   
• Apply tastant to the center of the tongue, rubbing back and forth, being careful to avoid the 
margins of the tongue and gel.   
• Tell subjects, “there will be a random assortment of the 4 tastants, not be one of each”. 
• Rinse between tastants  
The Lidocaine tester will complete the Oral Lidocaine Testing Data Collection Form. The 
subject and those doing the testing will be instructed not to discuss the results of the lidocaine 
effectiveness testing. 
G. LABELS 
ALL SITES:  Bag around kit, with label of instructions and site identification 
 
COLOR OF LABEL: PINK 
COLOR OF LABEL: White 
PRE-GEL: Tastants & Swabs 
Inner Bag 
*Use at room temperature 
*Contains one of each tastant 
Use by: mm/dd/yyyy 
Contains material from  
lot number xxxxxxxx@x 
lot number xxxxxxxx@x  
lot number xxxxxxxx@x 
POST-GEL: Tastants & Swabs 
Inner Bag 
*Use at room temperature 
*Contains random assortment of 4 
tastants, minimum of 1 each 
Use by: mm/dd/yyyy 
Contains material from  
lot number xxxxxxxx@x 
lot number xxxxxxxx@x  
lot number xxxxxxxx@x 
lot number xxxxxxxx@x  
 
ALL SITES: 
Lidocaine blister & Applicator Inner Bag 
Use by dd/mm/yyyy 
Contains material from  
lot number xxxxxxxx@x 
 
Tastant bottle labels:  white 
(tastant NOT revealed on label) 
Tastant 
All 
Label 
Shake before using 
# xxxxx 
 
H. SUBMIT RESULTS USING ELECTRONIC DATA COLLECTION FOR 
ANALYSIS 
The results of the endpoints of the lidocaine effectiveness testing will be submitted electronically 
using the Oral Lidocaine Testing Results form. 


I. THANK SUBJECTS FOR PARTICIPATION AND PROVIDE TRAVEL 
REIMBURSEMENT 
Subjects will receive a $25 Amazon Gift Certificates. 
J. CLINICIAN PROVIDES GUIDANCE ON FUTURE USE OF ANESTHETICS 
After results have been analyzed, the site will inform the subjects of their lidocaine effectiveness 
status.  These results of the lidocaine test will be shared with the local principal investigator, so that 
the clinician can provide guidance about future use of anesthetics.  We believe bias will be avoided 
by not unblinding until this point, together with aspects of the study design, including with the 
inclusion of pure water as a taste, resulting in no one tasting every taste, the separation of roles, and 
the presence of tingling in the tongue, even among those who do not get numb. 
DATA ANALYSIS / STATISTICAL METHODS 
1. SAMPLE SIZE DETERMINATION 
The sample size of n=30 subjects with hard to treat ADHD is for observational purposes, since the 
site is exclusively a specialty medical home without access to normal controls. 
2. EFFECT SIZE ANALYSIS 
Based on prior studies, we anticipate 30-60% lidocaine ineffectiveness in hard to treat ADHD and 
3-11% in those without ADHD.