Assurans Injection is a specialized medicine for the treatment of pulmonary arterial hypertension (PAH) and erectile dysfunction (ED), which aids circulation. The injection consists of sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor, which results in relaxation of the blood vessels, hence increasing circulation of blood in specific body parts. The injection is usually administered under the supervision of a healthcare provider for those patients requiring instant action.