SPL Set ID: 99351f77-46b8-4741-9193-1a6d6a7b0b18

Piroxicam USP is a nonsteroidal anti-inflammatory drug, available as maroon and blue 10 mg capsules and maroon 20 mg capsules for oral administration. The chemical name is 4-hydroxyl-2-methyl- N -2pyridinyl-2 H -1,2,-benzothiazine-3-carboxamide 1,1-dioxide. The molecular weight is 331.35. Its molecular formula is C 15 H 13 N 3 O 4 S, and it has the following chemical structure. Piroxicam occurs as a white crystalline solid, insoluble in water and anhydrous ethanol. It is slightly soluble in 0.1N sodium hydroxide and soluble in methylene chloride. It exhibits a weakly acidic 4-hydroxy proton (pKa 5.1) and a weakly basic pyridyl nitrogen (pKa 1.8). The inactive ingredients in piroxicam capsules USP include: lactose monohydrate, corn starch, sodium lauryl sulfate, magnesium stearate, gelatin, FD&C Blue 1, D&C Red 33, FD&C Red 40, D&C Red 28, titanium dioxide and trace amount of white edible ink.