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CompletedNCT05926258Updated Mar 9, 2026Results posted

Efficacy and Safety of Chloroprocaine 3% Gel and Oxybuprocaine 0.4% Eye Drops Anesthesia in Pediatric Population

A Phase 3 interventional study of Chloroprocaine 3% eye gel and Oxybuprocaine Hydrochloride 4 Mg/mL Eye Drops in Local Anesthetic, sponsored by Sintetica SA. Completed at 3 sites in Italy. Open to participants aged 1 Day to 18 Years. Per ClinicalTrials.gov, last updated 2026-03-09.

Sponsored by Sintetica SA · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
74
Allocation
Randomized
Ages
1 Day to 18 Years
Sex
All
01

Study summary

The goal of this clinical trial is to assess the efficacy and safety of Chloroprocaine 3% eye gel compared to Oxybuprocaine 0,4% eye drops when used for inducing ocular surface anesthesia in pediatric patients.

74 Participants (male and female, aged 0-17 yrs) will be 1:1 randomized for receiving either the test drug (Chloroprocaine) or the reference drug (Oxybuprocaine) before undergoing to ocular exam who needs ocular surface anesthesia.

The successful surface anesthesia will be evaluated 5 minutes after receiving 2 drops (1 minute apart) of either test or reference drug by an eye spear sponge

02

Conditions studied

  • Local Anesthetic

Keywords

  • chloroprocaine
  • eye gel
  • ocular surface anesthesia
03

In context

Lead sponsor

Sintetica SA is the lead sponsor of 11 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Day to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

To be enrolled in this study, patients must fulfil all these inclusion criteria:

  1. Age ≥ one day of life (newborn, infant, child) and 17 years included (not anticipated to turn 18 during the study).
  2. Female subjects currently either of:

    • Non-childbearing potential (i.e., premenarchal or physiologically incapable of becoming pregnant, including any female who is surgically sterilized via documented hysterectomy or bilateral tubal ligation), or
    • Childbearing potential (i.e., postmenarchal girls): the subject is eligible to enter and participate in this study if she is not lactating, has a negative pregnancy test and agrees to abstain from intercourses or uses a valid contraceptive method until study completion.
  3. Signed written informed consent by both parents or legal representative(s) (unless only one has legal authority). Written informed assent for adolescents aged 12-17 years included and, whenever possible, informed assent for children aged 6 to 11 years included. Ability of the subjects and their parents/legal representative(s) to understand and comply with the protocol requirements, study-specified visit schedule and procedures.
  4. Scheduled to undergo a routine clinical procedure which needs local ocular surface anesthesia, including but not limited to applanation tonometry, gonioscopy, Ultrasound Biomicroscopy (UBM), ocular ultrasonography, retinal peripheral examination with blepharostat and scleral indentation.

Exclusion criteria

Exclusion Criteria:

  • Patients fulfilling at the inclusion visit one or more of the following exclusion criteria will not be enrolled in the study:

Ophthalmic exclusion criteria

  1. Previous ocular surgery less than 6 months before screening
  2. Eye movement disorder (nystagmus)
  3. History of herpetic keratitis
  4. Corneal, epithelial, stromal or endothelial, residual or evolutionary disease (including corneal ulceration, corneal damage and superficial punctuate keratitis)
  5. History of ocular traumatism, infection or inflammation within the last 3 months Systemic/non ophthalmic exclusion criteria

    • General history:
  6. Any other medical or surgical history, disorder or disease such as acute or chronic severe organic disease: hepatic, endocrine neoplasia, hematological diseases, severe psychiatric illness, cardiac rhythm disorders and/or any complicating factor or structural abnormality judged by the investigator to be incompatible with the study

    • Allergic history:
  7. Known hypersensitivity to one of the components of the investigational products Exclusion criteria related to general conditions
  8. Non-compliant patient and/or parent(s)/legal representative(s) (e.g., not willing to attend the follow-up visits, way of life interfering with compliance)
  9. Participation in another clinical study in the last three months before this study. The 3-month interval is calculated as the time between the first calendar day of the month that follows the last visit of the previous study and the first day of the present study
  10. Already included once in this study Exclusion criteria related to previous and concomitant medications / non-product therapies
  11. Patient using any of the following previous and concomitant medication / treatment (according to the described periods) will not be included in the study:

NOT ALLOWED CONCOMITANT MEDICATIONS (washout times) Any change in concomitant anti-depressant medication: no changes permitted during the entire trial duration Any topical ocular treatment: within 15 days before inclusion Systemic opioids and morphine drugs, Sulohonamides, Anticholinesterase drugs: from 15 day before the inclusion visit onwards Any change in other systemic medication already ongoing before the inclusion visit: 7 days before the inclusion visit onwards Other systemic antalgics drugs (except for paracetamol)* from Day 1 onwards

*Paracetamol after primary endpoint assessment and oral, implantable, transdermal, or injectable contraceptives for child-bearing potential girls during the entire study will be allowed

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
74 participants (actual)

Study arms

  • Experimental
    Chloroprocaine 3% gel

    The assigned investigational product (2 drops) will be instilled in both eyes of each subject. Administrations will be performed at the clinical centre by the Investigator or his/her deputy on study day 1. For each administration, the 2 drops will be instilled one at the time, at a 1 min interval.

    Drug: Chloroprocaine 3% eye gel

  • Active comparator
    Oxybuprocaine 0,4% solution

    The assigned active comparator (2 drops) will be instilled in both eyes of each subject. Administrations will be performed at the clinical centre by the Investigator or his/her deputy on study day 1. For each administration, the 2 drops will be instilled one at the time, at a 1 min interval.

    Drug: Oxybuprocaine Hydrochloride 4 Mg/mL Eye Drops

Interventions

  • DrugChloroprocaine 3% eye gel

    ocular surface anesthesia

    Also known as: Chemical Abstracts Service (CAS) nr 3858-89-7

  • DrugOxybuprocaine Hydrochloride 4 Mg/mL Eye Drops

    ocular surface anesthesia

    Also known as: Benoxinate

06

What researchers measure

Primary outcomes

  1. Conjunctiva Anesthesia With Chloroprocaine 3% Eye Gel as Compared With Oxybuprocaine Chlorhydrate 0.4% Eye Drops

    Efficacy outcome: assess of patients in each treatment group with a successful conjunctiva anesthesia in the right eye, 5 minutes after study product administration, i.e. right before the ocular examination, to be assessed by eye spear sponge.

    Time frame: day 1

Secondary outcomes

  1. Number of Participants With Adverse Events

    Evaluation of safety by assessing the occurrence of adverse events throughout the study

    Time frame: from day 1 until study end (day 8 or day 15)

  2. Assessing the Product Global Tolerance Graded

    Evaluation of safety by assessing the product global tolerance graded by the Investigator by answering the following question "How do you consider the study product global tolerance" using the following scale: 0=very unsatisfactory, 1=unsatisfactory, 2= satisfactory, 3=very satisfactory.

    Time frame: day 1, post dose

07

Results

Posted Mar 9, 2026

Participant flow

Participant flow — Overall Study
MilestoneChloroprocaine 3% GelOxybuprocaine 0,4% Solution
Started3836
Completed3736
Not completed10

Outcome measures

PrimaryConjunctiva Anesthesia With Chloroprocaine 3% Eye Gel as Compared With Oxybuprocaine Chlorhydrate 0.4% Eye Drops

Efficacy outcome: assess of patients in each treatment group with a successful conjunctiva anesthesia in the right eye, 5 minutes after study product administration, i.e. right before the ocular examination, to be assessed by eye spear sponge.

Time frame:
day 1
Reported as:
Number · participants
Conjunctiva Anesthesia With Chloroprocaine 3% Eye Gel as Compared With Oxybuprocaine Chlorhydrate 0.4% Eye Drops
participantsChloroprocaine 3% GelOxybuprocaine 0,4% Solution
Conjunctiva Anesthesia With Chloroprocaine 3% Eye Gel as Compared With Oxybuprocaine Chlorhydrate 0.4% Eye Drops1923
SecondaryNumber of Participants With Adverse Events

Evaluation of safety by assessing the occurrence of adverse events throughout the study

Time frame:
from day 1 until study end (day 8 or day 15)
Reported as:
Count of participants · Participants
Number of Participants With Adverse Events
ParticipantsChloroprocaine 3% GelOxybuprocaine 0,4% Solution
Number of Participants With Adverse Events10
SecondaryAssessing the Product Global Tolerance Graded

Evaluation of safety by assessing the product global tolerance graded by the Investigator by answering the following question "How do you consider the study product global tolerance" using the following scale: 0=very unsatisfactory, 1=unsatisfactory, 2= satisfactory, 3=very satisfactory.

Time frame:
day 1, post dose
Reported as:
Count of participants · Participants
Assessing the Product Global Tolerance Graded
ParticipantsChloroprocaine 3% GelOxybuprocaine 0,4% Solution
Scores 32527
Scores 2107
Scores 100
Score 012
Not done10

Adverse events

Collected over 18 days. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Chloroprocaine 3% Gel0/37 (0%)0/37 (0%)1/37 (2.7%)
Oxybuprocaine 0,4% Solution0/36 (0%)0/36 (0%)0/36 (0%)
Most frequent other events
Most frequent other events
EventChloroprocaine 3% GelOxybuprocaine 0,4% Solution
eye pruritusEye disorders1/370/36
Injury cornealEye disorders1/370/36

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Chloroprocaine 3% GelOxybuprocaine 0,4% SolutionTotal
<=18 years373673
Between 18 and 65 years000
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)Chloroprocaine 3% GelOxybuprocaine 0,4% SolutionTotal
Female141226
Male232447
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Chloroprocaine 3% GelOxybuprocaine 0,4% SolutionTotal
Hispanic or Latino426
Not Hispanic or Latino333265
Unknown or Not Reported022
08

Study locations

3 sites
  • IRCCS Ospedale San Raffaele
    Milan, MI 20132, Italy
  • ASST Grande Ospedale Metropolitano Niguarda
    Milan, MI 20162, Italy
  • Ospedale della Donna e del Bambino, Ospedale Borgo Trento, Azienda Ospedaliera Universitaria Integrata
    Verona, VR 37126, Italy
09

References and documents

Study documents

  • Study protocol · Nov 10, 2023
  • Statistical analysis plan · Jun 6, 2025

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 9, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT05926258
Lead sponsor
Sintetica SA
Collaborators
Cross Research S.A.
Responsible party
Sponsor
First posted
Jul 3, 2023
Start date
May 23, 2024
Primary completion
Mar 13, 2025
Completion
Mar 13, 2025
Results posted
Mar 9, 2026
Last update
Mar 9, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.

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