Fildena 150 mg is absorbed into the bloodstream and starts working within 30 to 60 minutes after ingestion. Its effects can last for up to 4 to 6 hours, making it a suitable option for men who need extended relief during this time frame. Sexual stimulation is required for the medication to be effective. In rare cases, Fildena 150 mg can cause more serious side effects like sudden vision loss, prolonged erection (priapism), or hearing loss, and immediate medical attention should be sought if any of these occur.