Ivabradine is used to treat certain patients with heart failure (condition in which the heart is unable to pump enough blood to the other parts of the body) to decrease the risk that their condition will worsen and need to be treated in a hospital. Ivabradine is in a class of medications called hyperpolarization-activated cyclic nucleotide-gated (HCN) channel blockers. It works by slowing the heart rate so the heart can pump more blood through the body each time it beats.