How is it that these are hands down the best hard candies yet so hard to find except at hardware stores and hobby lobby?

Horehound candy drops are bittersweet hard candies like cough drops made with sugar and an extract of M. vulgare. They are dark-colored, dissolve in the mouth, and have a flavor that has been compared to menthol and root beer. Like other products derived from M. vulgare, they are sometimes used as an unproven folk treatment for coughs and other ailments.[10][11]

M. vulgare is used to make beverages such as horehound beer (similar to root beer), horehound herbal tea (similar to the Maghrebi mint tea), and the rock and rye cocktail