Fildena 200 is a prescription medication used to treat erectile dysfunction (ED) in men. It contains Sildenafil Citrate, which increases blood flow to the penis, resulting in a firm and lasting erection. The medication works by inhibiting the action of PDE5 and promoting the accumulation of cGMP, which relaxes and widens the blood vessels in the penis. fildena double 200 mg can also be used to treat pulmonary arterial hypertension (PAH). It is taken orally with water, preferably on an empty stomach, about an hour before sexual intercourse.