Vilitra 40 mg may help with erection problems, but it is not a recommended dose of vardenafil for erectile dysfunction. Vilitra typically contains vardenafil, which helps increase blood flow to the penis during sexual stimulation. However, the usual recommended starting dose is 10 mg, and the maximum recommended dose is 20 mg once daily. A 40 mg dose exceeds that limit and can increase the risk of  Vilitra 40 mg effects without reliably improving erections further. How it works Helps you achieve and maintain an erection when sexually aroused. Usually begins working within 30–60 minutes. Its effects typically last around 4–6 hours, although this varies. Risks of Vilitra 40 mg Taking more than the recommended dose can increase the risk of: Low blood pressure, dizziness or fainting Headache, flushing and rapid heartbeat Visual disturbances A prolonged erection lasting more than 4 hours, which requires emergency treatment Never combine vardenafil with nitrate medicines such as nitroglycerin, or with other erectile dysfunction medicines unless specifically directed by your doctor. What should you do? If Vilitra 20 mg isn't working, don't increase to 40 mg yourself. A doctor can assess the cause and consider a safer alternative or treatment adjustment.