Over the past month he was on prescription
medications including Otomax (ears), Ketoconazole 50 mg, and Temiril-P, all in tablet form and Cephalexin, a capsule. The Temiril (at more than $1 per pill) provided the medications in the subject line, less the Benadryl.
Clearly one or more of the above cleared up the paw licking problem - and maybe the itch problem in general, but I also will guess the combination of meds teamed to accomplish the improvement.