The invention relates to a derivative of 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide of the formula: ##STR1## in which X is 6-aminopurinyl. The above compound exhibits anti-inflammatory activity.

The present invention relates to a process for the transformation of Piroxicam, N-(2-pyridyl)-2-methyl-4-hydroxy-2H-1, 2-benzothiazine-3-carboxamide 1,1-dioxide into an hydrated form, suitable for oral, topic or parenteral administration.

Water-soluble salts of (+)2-(4-fluorophenyl)-alpha-methyl-5-benzoxazole acetic acid with DL-lysine, D-lysine or L-lysine, suitable for the preparation of medicinal specialities such as syrups, creams, suppositories, aqueous solutions for personal hygiene etc, and their preparation process. Said salts are obtained by suspending said acid in an organic solvent soluble or partly soluble in water, adding an equivalent quantity of said lysine and crystallizing the salt obtained.

Lysine and arginine salts of thionaphthene-2-carboxylic acid (TNCA) are disclosed. These compounds are useful as treatments for osteoporosis and exhibit an increased water solubility.

Malignancy-induced hypercalcemia is treated with thionapthene-2-carboxylic acid (TNCA) and the pharmaceutically acceptable salts thereof. The treatment is also effective in tumor bearing hosts even before there is significant abnormal serum calcium levels. There is no "escape" from the hypocalcemic effects of these compounds as with e.g., calcitonin. The useful dosage in humans for TNCA itself ranges from about 1 to about 60 mg/kg/day preferably from about 2 to about 30 mg/kg/day and more preferably from about 5 to about 20 mg/kg/day (20 mg is approximately 0.106 mmol) Orally administered TNCA or salts thereof, is a much desired and obviously clinically advantageous mode of administering compounds to control or ameliorate hypercalcemia.