Herbal smoking products From 1 January 2014 herbal smoking products will have Tobacco Products Duty charged on them unless they are to be used exclusively for medical purposes. From: Contents Introduction This guide explains your responsibilities if you are a UK manufacturer or importer of herbal smoking products, including: how to register as a manufacturer, the records you must keep, what returns you need to complete and where to get more help and advice. Herbal smoking products cigarettes smoking mixtures for hand rolling into cigarettes These are only examples of the type of products that are classed as herbal smoking products and other products could be affected.