Just found this when I googled it
In cats with experimental renal insufficiency, FORTEKOR normalized the elevated glomerular capillarly pressure (GCP) and reduced the systemic blood pressure. Reduction in glomerular hypertension retards the progression of kidney disease by inhibition of further damage to the kidneys. In a large clinical trial in cats with chronic kidney insufficiency, FORTEKOR significantly reduced protein loss in the urine; this effect is probably mediated via reduced GCP and beneficial effects on the glomerular basement membrane. FORTEKOR also increased the appetite, quality of life and the survival time of the cats, particularly in more advanced cases.