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.
For instance, a reduction in income tax rates or increase. in personal exemptions that is placed permanently in. the tax code should have a larger effect on consumer. spending (per dollar of tax revenue lost) than a tempo-. rary rate reduction or increase in exemptions.