Rituximab (Rituxan and MabThera) is a drug used to treat rheumatoid arthritis that has not improved with other types of medications, as well as certain forms of vasculitis. It works by turning off a part of the immune system that is not working properly in autoimmune diseases.
For the purpose of this sales tax exemption, âdirectlyâ means having an immediate effect on an item or in an activity, without an intervening, ancillary or prior effect.
Sales tax exemptions are provided by state law, primarily in Chapter 144 of the Revised Statutes of the State of Missouri, for a variety of items including, but not limited to: component parts, machinery used in the manufacture of products sold at retail, export sales, and resale.