Xanthinol niacinate is a combination of xanthinol and niacin which acts as a vasodilator. Studies show that Xanthinol niacinate can modulate tumors during their reoxygenation. Xanthinol niacinate also displays anti-platelet and thrombolytic activity. In addition, this compound can reduce whole blood viscosity, as a result of its anti-platelet activity and decrease cholesterol and fibrinogen.