TOLECTIN DS (tolmetin sodium) capsules for oral administration contain tolmetin sodium as the dihydrate in an amount equivalent to 400 mg of tolmetin. Each capsule contains 36 mg (1.568 mEq) of sodium and the following inactive ingredients: gelatin, magnesium stearate, corn starch, talc, FD&C Red No. 3, FD&C Yellow No. 6 and titanium dioxide.