For those who itemize and have additional dependents, the calculation still requires someone to determine the income not subject to tax (itemized deductions, student loan interest, dependents, etc.) and divide it by the value of an allowance.
Taj Pharmaceuticals Ltd. is a Pharmaceutical Generic manufacturer of  Leflunomide and manufacturer of various pharmaceutical formulations in India. Taj Pharmaceuticals Ltd. provide different pharmaceutical brands and Generic Medicines.
Who makes this drug? Asacol is manufactured by Procter & Gamble Pharmaceuticals. At this time, Asacol is protected by patents that prevent any other company from making a generic version of this drug. However, if you search the Internet for generic Asacol, you will find a number of companies selling it.