Filitra 40 mg contains vardenafil, which is a medication used to treat erectile dysfunction (ED) in men. Vardenafil is a phosphodiesterase type 5 (PDE5) inhibitor that works by increasing blood flow to the penis during sexual stimulation, enabling men to achieve and maintain an erection. The typical recommended dosage of Filitra 40 mg is one tablet taken orally with a full glass of water, approximately 30 minutes to 1 hour before anticipated sexual activity. It's important to take the tablet whole and not crush or chew it. Filitra 40 mg typically starts working within 30 to 60 minutes after ingestion, but the onset of action can vary from person to person. Encourage patients to plan accordingly and not rush sexual activity.