ClinicalTrials.gg
CompletedNCT05138861Updated Apr 12, 2024

A Six Week Pharmacokinetic Study of TP-03 in Healthy Subjects

A Phase 1 interventional study of TP-03 (Lotilaner Ophthalmic Solution), 0.25% in Healthy, sponsored by Tarsus Pharmaceuticals, Inc.. Completed at 1 site in Canada. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-04-12.

Sponsored by Tarsus Pharmaceuticals, Inc. · Phase 1, Interventional, and Basic science

From the registry’s dates

  • Primary completion was Sep 2021, 5 years 2 months ago, and no results have been posted to the registry.
  • Registered 5 months after the study started (first participant enrolled Feb 2021, registered Jul 2021).
Phase
Phase 1
Study type
Interventional
Enrollment
24
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

Pharmacokinetic Study to Evaluate the Whole Blood Pharmacokinetics of TP-03 Following Six Week Topical Ocular Administration.

Read the detailed description

This is a single-center, open-label, single-arm study. A single drop of the ophthalmic solution will be instilled in each eye on the morning of Day 1 and then twice a day (in the morning and in the evening, approximately 12 hours apart) starting on Day 2 for 40 consecutive days (Days 2 to 41). Thereafter, a single drop of the ophthalmic solution will be instilled in each eye on the morning of Day 42, for a total of 82 consecutive doses administered in each eye. The doses of Days 1, 2 (morning), 41 (evening), and 42 will be self-administered under supervision of the site staff at the clinical site. All remaining doses will be self-administered at home. Throughout the study, PK blood samples will be collected and safety assessments will be performed.

02

Conditions studied

  • Healthy
03

In context

Lead sponsor

Tarsus Pharmaceuticals, Inc. is the lead sponsor of 13 studies on the registry; 2 are open to participants now.

Of its 8 completed or terminated interventional studies of FDA-regulated products, 3 (38%) have results posted.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Provision of signed and dated form (ICF)
  2. Stated willingness to comply with all study procedures and availability for the duration of the study
  3. Healthy adult male or female
  4. If female, meets one of the following criteria:

    1. Is of and agrees to use an acceptable method.

      Or

    2. Male partner has had a vasectomy less than 6 months prior to dosing and the female subject agrees to use an additional acceptable contraceptive method from the first study drug administration until 112 days after the last study drug administration Or
    3. Is of non-childbearing potential, defined as surgically sterile (ie, has undergone complete hysterectomy, bilateral oophorectomy, or tubal ligation) or is in a state (ie, at least 1 year without menses without an alternative medical condition prior to the first study drug administration)
  5. Aged at least 18 years
  6. Non- or ex-smoker (An ex-smoker is defined as someone who completely stopped using nicotine products for at least 180 days prior to the first study drug administration)
  7. Have no diseases captured in the medical history or evidence of clinically significant findings on the physical examination (including vital signs) and/or , as determined by an Investigator

Exclusion criteria

Exclusion Criteria:

  1. Female who is lactating
  2. Female who is pregnant according to the pregnancy test at screening or prior to the first study drug administration
  3. Presence or history of significant gastrointestinal, liver or kidney disease, or surgery that may affect drug bioavailability
  4. History of significant cardiovascular, pulmonary, hematologic, neurological, psychiatric, endocrine, immunologic or dermatologic disease
  5. Significant history of drug dependency or alcohol abuse (> 3 units of alcohol per day, intake of excessive alcohol, acute or chronic)
  6. Any illness in the 28 days prior to the first study drug administration
  7. Use of any prescription drugs (with the exception of hormonal or hormone replacement therapy) in the 28 days prior to the first study drug administration
  8. Use of St. John's wort in the 28 days prior to the first study drug administration
  9. History of any ocular surgery or laser within the past 12 months prior to the first study drug administration
  10. Have used artificial eyelashes, eyelash extensions or had other cosmetic eyelash or eyelid procedures (e.g., eyeliner tattooing, eyelash tinting, eyelash curling perm, etc.) within 7 days prior to Screening or unwilling to forego their use during the study
  11. Presence of clinically significant ocular surface diseases including blepharitis, dry eye, corneal scars, and pterygium, or any ocular abnormalities identified at Screening
  12. Presence of acute ocular infection or inflammation at Screening, or required use of eye drops
  13. Any history of tuberculosis
  14. Positive screening results to Ag/Ab combo, surface antigen or virus tests
  15. Intake of an Product (IP) in the 28 days prior to the first study drug administration
  16. Donation of 50 mL or more of blood in the 28 days prior to the first study drug administration
  17. Donation of 500 mL or more of blood (Canadian Blood Services, Hema-Quebec, clinical studies, etc.) in the 56 days prior to the first study drug administration
Terms in these criteria, in plain language(10)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
24 participants (actual)

Study arms

  • Experimental
    TP-03 (Lotilaner Ophthalmic Solution), 0.25%

    TP-03, topical ocular administration in healthy adults. Single and multiple doses for 42 days.

    Drug: TP-03 (Lotilaner Ophthalmic Solution), 0.25%

Interventions

  • A single drop of the ophthalmic solution will be instilled in each eye on the morning of Day 1 and then twice a day (in the morning and in the evening, approximately 12 hours apart) starting on Day 2 for 40 consecutive days (Days 2 to 41). Thereafter, a single drop of the ophthalmic solution will be instilled in each eye on the morning of Day 42, for a total of 82 consecutive doses administered in each eye.

06

What researchers measure

Primary outcomes

  1. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Cmax at various times

    Time frame: 42 Days

  2. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Tmax at various times

    Time frame: 42 Days

  3. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Tlag at various times

    Time frame: 42 Days

  4. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner AUC0-168 at various times

    Time frame: 42 Days

  5. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner AUC0-2880 at various times

    Time frame: 42 Days

  6. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner AUC0-t at various times

    Time frame: 42 Days

  7. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner AUC0-inf at various times

    Time frame: 42 Days

  8. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner CL/F at various times

    Time frame: 42 Days

  9. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Vz/F at various times

    Time frame: 42 Days

  10. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner eff at various times

    Time frame: 42 Days

  11. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Thalf at various times

    Time frame: 42 Days

  12. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner λz at various times

    Time frame: 42 Days

  13. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner AUC%extrap at various times

    Time frame: 42 Days

  14. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner MRT0-t at various times

    Time frame: 42 Days

  15. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Rac at various times

    Time frame: 42 Days

  16. To evaluate the concentration of lotilaner in blood multiple doses of TP-03, 0.25% in whole blood following topical ocular administration in healthy adult subjects for 42 days.

    The primary PK endpoints following single and multiple dose administration will include whole blood PK parameters for lotilaner Ctrough at various times

    Time frame: 42 Days

  17. Incidence of treatment emergent adverse events (TEAEs)

    Safety will be evaluated through the incidence rate of TEAEs

    Time frame: 42 Days

  18. Clinically significant changes from Baseline chemistry laboratory tests

    Evaluate the safety of TP-03 through clinically significant changes from Baseline chemistry laboratory tests

    Time frame: 42 Days

  19. Clinically significant changes from Baseline hematology laboratory tests

    Evaluate the safety of TP-03 through clinically significant changes from Baseline hematology laboratory tests

    Time frame: 42 Days

  20. Clinically significant changes from Baseline physical examinations

    Safety will be evaluated through review of clinically significant changes in physical examinations from Baseline

    Time frame: 42 Days

  21. Clinically significant changes from Baseline electrocardiograms (ECGs)

    Safety will be evaluated through review of clinically significant changes in electrocardiograms from Baseline

    Time frame: 42 Days

  22. Clinically significant changes from Baseline vitals

    Safety will be evaluated through review of clinically significant changes from Baseline vital signs (including temperature \[degrees Celsius\], pulse rate \[beats per minute\], respiration rate \[breaths per minute\], and changes in systolic and diastolic blood pressure \[mmHg\]) from Baseline

    Time frame: 42 Days

  23. Clinically significant changes from Baseline corrected distance visual acuity

    Safety will be evaluated through review of clinically significant changes in corrected distance visual acuity from Baseline

    Time frame: 42 Days

  24. Clinically significant changes from Baseline non-mydriatic fundus photographs

    Safety will be evaluated through review of clinically significant changes in non-mydriatic fundus photographs from Baseline

    Time frame: 42 Days

  25. Clinically significant changes from Baseline intraocular pressure (IOP) measurement

    Safety will be evaluated through review of clinically significant changes in IOP from Baseline

    Time frame: 42 Days

07

Study locations

1 site
  • Altasciences
    Mount Royal, Quebec, Canada
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Feb 2021 to primary completion in Sep 2021, 6 months.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 22, 2021
First posted
Dec 1, 2021
StartActual
Feb 9, 2021
Primary completionActual
Sep 3, 2021
CompletionActual
Sep 3, 2021
Last update
Apr 12, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 12, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05138861
Lead sponsor
Tarsus Pharmaceuticals, Inc.
Responsible party
Sponsor
First posted
Dec 1, 2021
Start date
Feb 9, 2021
Primary completion
Sep 3, 2021
Completion
Sep 3, 2021
Last update
Apr 12, 2024

Study contacts

Mark Holdbrook
study director · Tarsus Pharmaceuticals

Oversight

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

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This study is completed, as verified in Apr 2024. You cannot join it, but the record below documents what was studied.

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Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

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Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: TP-03

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