If the K has an arrow coming out of the top right part of the K, it is an OTC medication manufactured by PDK Labs. You can email them directly at
info@pdklabs.com. To my knowledge, they do not have a list of their products available online, nor are there many of them listed in the databases.
PDK offers a wide variety of products for private label to chain drug stores, supermarket chains, deep discounters, wholesalers, distributors and manufacturers.