A soluble aspirin composition, comprising: (i) granules including aspirin, heat-treated bicarbonate salt, pharmaceutically-acceptable resin and surfactant, in mixture with: (ii) crystalline particles of pharmaceutically-acceptable acid and (iii) crystalline particles of heat-treated bicarbonate salt wherein the soluble aspirin composition when introduced to water undergoes reaction of the crystalline particles of pharmaceutically-acceptable acid with the heat-treated bicarbonate salt and the aspirin to effect effervescing action and disintegration of the granules with conversion of the aspirin to an acetylsalicylate compound of the bicarbonate salt cation so that the composition rapidly dissolves in the water without occurrence of undissolved residue. The composition is solubilizable within 30 seconds in cool to cold water to provide an effervescent analgesic solution that can be readily orally administered to an individual in need of analgesia.
