Spironolactone aqueous compositions

A ready-to-use liquid formulation, comprising:

• (a) 0.50% w/v of spironolactone;
• (b) from 0.18% w/v to 0.36% w/v of a xanthan gum;
• (c) from 0.2% w/v to 0.6% w/v of an anti-foaming agent;
• (d) from 0.125% w/v to 0.250% w/v of a preservative;
• (e) from 1.8% w/v to 2.4% w/v of a dispersing agent;
• (f) from 0.04% w/v to 0.6% w/v of a sweetening agent;
• (g) from 0.1% w/v to 0.5% w/v of a flavoring agent;
• (h) a sufficient amount of a citrate buffer to maintain the pH of the formulation from 4.5 to 5.5;
• and
• (i) a sufficient amount of a water vehicle,
• wherein the formulation exhibits a spironolactone content of 100 ±10% labeled content for about 24-months when stored at 25±2° C. and 40±5% relative humidity.