A composition containing a peripheral benzodiazepine receptor ligand for topical use in the treatment of cutaneous stress. According to one embodiment, the method comprises partitioning the first array into one or more groups of entries and then categorizing each group with a category categorizing relationships between entries of a respective group, or entries of a respective group and entries of another group. An electrical device, particularly an electrical hand-held device, may have at least one such capacitive sensor device. Actuation of the drug delivery device inserts the microneedle array into the skin of a subject and causes a piston to compress the drug reservoir, thereby delivering the drug through the microneedle array to the subject.