What is the best over-the-counter medicine for ezcema?

OTC creams, etc... To treat mild or moderate eczema, Hydrocortisone 1% cream (use a thin coat on the rash, twice a day, for 5-10 days) is cheap, found at most stores and works well. A daily moisturizing cream (cetaphil, cerave, eucerin, etc.) used 2-4 times a day helps to heal eczema & to prevent return of the rash. One can avoid creams with lanolin, aloe, or fragrances if sensitive to the ingredients. Avoid soaps.
No one best... The the treatment of eczema is moisture. There are too many to name,but names don't really matter.Use does! If you moisturize at LEAST twice a day, limit bathing to 2-3 times a week, and when you do bathe, use moisturizing cleansing agent, you shouldn't need other medicines. But you to be obsessed about using the moisturizer. Flare-ups should then respond to non-prescription hydrocortisone.