The medicine Filagra is composed of Sildenafil Citrate. This medication helps in treating erectile dysfunction conditions in men. This impotence-treating medication is a well-indicated solution for the treatment of pulmonary arterial hypertension (PAH). This impotence-treating medication does the job by relaxing the muscles that are present in the penile and boosting the flow of blood in the penile. This medication shall help men to achieve and sustain a stiffer penile erection for a longer time.