Study of PK and Safety of the LicartTM Topical System in Pediatric and Adult Participants With Minor Soft Tissue Injury

Open-label, controlled study in pediatric and adult participants with minor soft tissue injuries. One-hundred fifty (150) participants between 6 and 11years old; 12 and 16 years old; and 18 and 45 years old will be enrolled, with equal numbers in each of the three age groups. The 50 adults enrolled will serve as the control. Participants will be seen by the principal investigator (PI) or designee at the clinical site, at entry and Visits 2 and 5 following the first topical system application, with the last visit scheduled on either Day 14 or the day after the participant experiences pain resolution. Visits 3 and 4 will be conducted via telehealth. At each study visit, adverse events (AEs) and concomitant medications will be recorded, local tolerability at the application site scored on a 7-point scale, and pain assessed by participants using the Wong-Baker FACES scale. Vital signs will be measured at the screening visit and Visits 2 and 5.

Participants will also assess pain twice daily (morning and evening) at home in the Participant Diary using the same Wong-Baker FACES scale. Blood samples will be obtained from each participant at Visit 2, 24 hours (± 1 hour) after initial topical system application at Visit 1, and at the time of study discontinuation (with a topical system in place) for determination of plasma diclofenac concentration and plasma activated partial thromboplastin time (aPTT). At the End-of-Study (EOS) Visit the principal investigator will provide an assessment of global response to therapy on a 5-point scale.

Participants will be asked to apply the Licart topical system once per day for a maximum of 14 days or until pain resolution, whichever occurs first.

This study will assess efficacy by the following assessments: Plasma diclofenac concentration, 24 hours (± 1 hour) after initial application (Visit 2) and EOS Visit; Pain score assessment by participant using the Wong-Baker FACES scale: every day (Participant Diary) and study visits on Visits 2, 3, 4 and 5; and Principal investigator assessment of global response to therapy on a 5-point scale.

This study will assess safety by the following assessments: Vital signs will be measured at the screening visit and Visit 2 and 5; AE reporting at each study visit; Local tolerability on a 7-point scale at Visits 2, 3, 4 and 5, or the day after pain resolution, with a topical system applied to the injured area; Plasma diclofenac concentration, 24 hours (±1 hour) after initial topical system application (Visit 2) and EOS Visit; and Plasma activated partial thromboplastin time (aPTT), 24 hours (±1 hour) after initial topical system application (Visit 2) and EOS Visit.