The purple heart-shaped tablets used for cat urinary incontinence are spironolactone tablets. Spironolactone tablet is a kind of potassium-preserving diuretic, which is purple heart-shaped tablet and has certain therapeutic effect on cat urinary incontinence. However, it should be used according to the doctor's advice and the actual situation of the cat, and at the same time, be careful not to stop taking the medicine at will, so as not to affect the therapeutic effect of the cat.