Lanman & Kemp was a multi-generational family firm of wholesale druggists in New York City. Their records document the operations of the wholesale drug business in the years before the development of modern pharmaceuticals. They also show the importance of New York City as a center for the import, export and re-export business and of London bankers in financing international trade and extending credit.

Patent medicines, also known as proprietary medicines, are non-prescription medicinal remedies that are trademarked and whose ingredients have been granted protection for exclusivity. The term "patent medicine" has become particularly associated with drug compounds manufactured during the eighteenth and nineteenth centuries. In actuality, the patent medicine recipes were not officially patented. Patent medicine promoters pioneered many advertising and sales techniques; this small collection primarily features trade cards and almanacs.