Fildena 200mg is a medication primarily used to treat erectile dysfunction (ED). Its main ingredient is sildenafil citrate, which works by increasing blood flow to the penis to help achieve and maintain an erection. Fildena 200mg dosage is quite high and is usually prescribed when lower doses have not been effective. It's crucial to follow your healthcare provider's instructions and not self-medicate.Fildena 100mg should be taken about 30 minutes to an hour before sexual activity. It’s typically effective for 4-6 hours.