Filitra 20 is available in a 20 mg dosage strength. It's typically taken orally, with or without food, about 25 to 60 minutes before anticipated sexual activity. The effects of Filitra 20 can last for up to 4 to 5 hours. It's important to consult a healthcare professional before starting treatment with Filitra 20, especially if you have any underlying health conditions or are taking other medications, as there may be interactions.