Assurans contains an active ingredient called Sildenafil citrate, which falls in the category of PDE5-inhibitor medicines. It efficiently works to block the enzyme called phosphodiesterase type 5. This enzyme is responsible for the contraction of arteries, which cause symptoms such as chest pain and chest pain in patients with pulmonary hypertension. Inhibiting this enzyme helps to prevent the degradation of cGMP, which is an important vasodilator. Later, it also helps to increase the level of nitric oxide, which is another vasodilator. This whole process helps to dilate the blood vessels and relaxes the muscles, which allows normal blood flow in the body. The drug efficiently works for the heart and allows it to pump blood.