The medication fildena 25 is prescribed to treat erectile dysfunction. Additionally, pulmonary arterial hypertension is indicated by it. An inhibitor of phosphodiesterase-5 is sildenafil. It functions by causing your penis' blood arteries to relax, which increases blood flow to the area during sexual stimulation. This aids in developing and keeping an erect, hard penis that is appropriate for intercourse. Sildenafil should be taken up to four hours before sexual activity. You must experience sexual arousal for sildenafil to function as intended. Take pills whole, preferably with some juice or water (not grapefruit juice). Back pain, nausea, stuffy nose, headaches, blurred vision, and flushing in the face, neck, or chest are some of the side effects of fildena 25.