Spironolactone aqueous compositions

A ready-to-use liquid formulation, comprising:

• (a) about 0.20% w/v to about 1.0% w/v of spironolactone;
• (b) from about 0.18% w/v to about 0.36% w/v of a xanthan gum;
• (c) a pharmaceutically acceptable excipient;
• and
• (d) a sufficient amount of a water vehicle;
• wherein the formulation has a spironolactone content of 100±10% labeled content when stored for about 24-months at 25±2° C. and 40±5% relative humidity.