Phase 1, randomized, single-blinded, placebo-control, ascending single and multiple dose of the PK, safety, and tolerability of XG005-03 topical formulation in Healthy Volunteers.

This is a single-blind, placebo-controlled study which will investigate the PK, safety and tolerability of XG005-03 topical formulation, in three ascending concentrations after single and multiple topical applications in healthy subjects. The trial consists of two parts: a single ascending dose (SAD; Part 1) and a multiple ascending dose (MAD; Part 2). The MAD study will begin after the SAD portion of the study is complete.

The study will consist of 4 weeks of screening period, treatment period (1 day of dosing for SAD and 6.5 days for MAD), and 14 days of safety follow-up period. Each subject will serve as his/her own control, as the XG005-03 and placebo will be applied on contralateral legs. Application of XG005-03 or placebo to a particular leg will be randomly assigned.

Approximately 36 healthy subjects will be enrolled. Eighteen healthy subjects (3 alternates per dose group) in Part 1 (SAD) and Part 2 (MAD), who fulfill eligibility criteria will receive the study drug: XG005-03 (1%, 5%, and 10%) and placebo.

Inclusion Criteria:

1. Healthy males or females between 18 and 55 years of age
2. BMI 18.0 to 30.0 kg/m2
3. Non-pregnant, non-breastfeeding female subjects

Exclusion Criteria:

1. Unstable or severe illness
2. Skin infection or lesion
3. Subjects with scars, moles, tattoos at application site
4. Expose to excessive UV
5. Hypersensitivity or allergy to NSAID