Sensitization Study of ATx201 in Healthy Volunteers

Inclusion Criteria: * Good general health * Body Mass Index no less than 19.0 and no greater than 36.0 kg/m² (inclusive). * Demonstrates a Fitzpatrick skin score of I - IV * Female subjects must agree to use acceptable contraceptive methods from the Screening Visit through 90 days after the End of Study (EOS) Visit; or postmenopausal status with no menses for at least 1 year prior to the Screening Visit. * Willing to refrain from excessive consumption of sodium in food or beverage 48 hours prior to Day 1 through EOS Visit. * Willing to shower using the same non-medicated soap/cleansers, and abstain from excessive sun exposure (including tanning salons) from the Screening Visit through EOS Visit. Exclusion Criteria: * Reports a history of diabetes mellitus, clinically significant asthma (acceptable if no episode within 5 years prior to Day 1), or currently diagnosed with hypertension or circulatory disease. * Reports use of any oral, nasal or topical corticosteroids, or oral or topical retinoids (other than Vitamin A at normal dietary amounts) * Reports a significant history of allergy to soaps, lotions, emollients, ointments, creams, cosmetics, adhesives, or latex. * Reports a history of significant skin conditions or disorders such as psoriasis, atopic dermatitis, etc. * Reports a history of significant dermatologic cancers. * Displays an obvious difference in skin color between upper arms or upper back or the presence of a skin anomaly * Reports smoking or use of tobacco or nicotine delivery products within 14 days prior to Day 1 through EOS Visit. * Presence of any clinically significant results from laboratory tests and vital signs assessments, as judged by the Investigator. * A female who is pregnant, lactating, breastfeeding, or intends to become pregnant over the course of the study. * Reports a history of drug or alcohol addiction or abuse within the past year. * Reports having donated blood or plasma within 48 hours prior to Day 1 through EOS Visit. * Subject exhibits excessive hair density on the upper arms or back such that patch adhesion could be compromised. * Subject reports undergoing hair depilation (e.g. chemical, laser, physical) within 30 days prior to Day 1 through EOS Visit.