Candoxatril is the orally-active prodrug of candoxatrilat (UK-73967), a potent neutral endopeptidase (NEP) inhibitor. Neutral endopeptidase inhibitors such as Candoxatril have a dual mechanism of action. They inhibit two metalloprotease enzymes, neutral endopeptidase, and ACE, resulting in an increased availability of natriuretic peptides that exhibit vasodilatory effects and, possibly, tissue protective effects. Candoxatril is the first drug of its kind to be released for clinical trials regarding heart failure. This is because Candoxatril produces favorable hemodynamic effects in patients with chronic heart failure. It has been demonstrated that Candoxatril is associated with a beneficial hemodynamic effect that is useful both for rest and exercise. In several different studies, candoxatril has been shown to improve performance in people with heart failure. In one study, 12 different patients were selected, all with moderately severe heart failure. On day one of this study, the candoxatril had increased plasma ANP levels, suppressed aldosterone and decreased right atrial and pulmonary capillary wedge pressures. After treatment for 10 days, patients health had improved with an increase of basal ANP and a decrease of aldosterone, along with a reduced body weight that could be a reflection of chronic natriuretic, diuretic effects, or both. It was decided that on day 10 of the study, the effects of candoxatril were similar to that on day one.