Can allergy and glaucoma drugs regrow hair when delivered by microneedling?

This pilot study tests whether delivering cetirizine (an allergy medication) or latanoprost (a glaucoma drug) through microneedling can safely and effectively regrow hair in people with patchy alopecia areata. About 80 participants with recent-onset, limited patches of hair loss will be randomly assigned to one of four groups: microneedling plus cetirizine, microneedling plus latanoprost, microneedling plus triamcinolone acetonide (a standard steroid treatment), or microneedling alone. The main goal is to compare changes in scalp hair loss severity, measured by the SALT score, and to assess hair regrowth using clinical photographs.