Men with erectile dysfunction or impotence may choose to use the specifically formulated Tadarise Pro 40 Mg pill. Another condition for which this medication is recommended is the treatment of pulmonary arterial hypertension (PAH). Tadalafil, the active ingredient in this drug, is a well-researched remedy for male impotence and pulmonary arterial hypertension. Tadalafil, the main ingredient in Tadarise Pro 40 Mg, has a half-life in the body of more than 36 hours, which is why it's known as the "weekend pill."