The purpose of this research study is to compare the bioavailability and adhesion of a generic Selegiline transdermal system (TDS) against the marketed comparator (EMSAM®) in healthy volunteers. Systemic and local safety and tolerability will be also observed and evaluated.

This is a single-dose, single-center, open-label, randomized crossover study (2 treatments, 2 periods and 4 sequences) of a generic test formulation of Selegiline TDS 6 mg/24 hours with the comparator EMSAM® TDS 6 mg/24 hours, with at least 56 days washout period, recruiting around 92 healthy male and female subjects.

For each study period, subjects will be admitted and confined in the clinical study site the night before the study day from at least 10 hours before dosing and they will be discharged once all PK, safety and tolerability are completed at 72 hours after dosing. Subjects will be required to return for subsequent PK, safety and tolerability at 84-hours post-dosing. The clinic will follow up by telephone 7 ± 3 days after subject completion of the study.

Trained study staff will also examine the patch application sites at scheduled time points and will score any skin reactions using standardized assessment scales. In addition, photographs of the patch application site will be taken to document adhesion status while the patch is being worn.

PK blood samples will be collected before dosing and at 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 25, 27, 28, 32, 36, 40, 44, 48, 60, 72 and 84 hours after dosing.

Furthermore, the overall safety of the test product will be compared with that of the comparator product by monitoring and recording any adverse events, side effects, or discomfort experienced by subjects during the study.

Inclusion Criteria:

• Male or female non-smoking subject.
• A body weight ≤ 120 kg and a BMI of 18.5-29.9 kg/m², inclusive.
• Good health as determined by lack of clinically significant abnormalities in the health assessments performed at screening, as deemed by the Investigator (or designee).
• Able and willing to comply with protocol restrictions and required study procedures.

Exclusion Criteria:

• History of allergy, hypersensitivity or idiosyncrasy to selegiline or other monoamine oxidase inhibitors (MAOIs), EMSAM® or any of its components, including glues/adhesives, or history of any drug hypersensitivity or intolerance that, in the opinion of the Investigator, would compromise the safety of the subject or integrity of the study.
• Presence of any skin condition such as scratches, cuts, rash, scars, abrasions, excessive hair, tattoos or similar embodiments, moles, recently shaved skin, uneven skin texture, sunburned skin, or excessively oily skin at the application areas that, in the opinion of the Investigator, may affect the application or adhesion of the study patch or the systemic absorption of selegiline from the patch.
• History or presence of any current dermatological condition such as atopy, psoriasis, eczema, chronic or atopic dermatitis, vitiligo, or urticaria which, in the opinion of the Investigator, would compromise the safety of the subject or the integrity of the study.
• Personal (or immediate family history, as deemed relevant by the Investigator) of psychiatric disorders such as bipolar disorder, mania, hypomania, suicidal thoughts or behaviors occurring within 2 years before initial patch application that required the subject, or immediate family member (if applicable), to be hospitalized or undergo treatment.