Fildena Double 200 mg is primarily used to treat erectile dysfunction (ED), a condition where men experience difficulty achieving or maintaining an erection during sexual activity. The medication contains sildenafil citrate, a potent PDE5 inhibitor that boosts blood flow to the penile region, promoting a firm erection. It is particularly effective for men with severe or persistent ED who may require a higher dosage for optimal results. In some cases, Fildena Double 200 mg may also be prescribed for pulmonary arterial hypertension (PAH), a condition involving high blood pressure in the lungs. However, its primary purpose remains ED treatment.