Filitra contains vardenafil, a medication used to treat erectile dysfunction (ED). Alcohol does not have a direct dangerous interaction with vardenafil for most people, but drinking alcohol can increase the likelihood of side effects and reduce the medication's effectiveness. Possible effects of combining alcohol with Filitra include: Increased dizziness or lightheadedness Headache Flushing (warmth and redness of the face) Filitra blood pressure, which may make you feel faint, especially when standing up Reduced ability to achieve or maintain an erection if you drink large amounts of alcohol A small amount of alcohol (for example, one standard drink for many adults) is often tolerated, but heavy drinking is more likely to cause problems and can make ED medications work less well. You should not take Filitra with nitrate medications (such as nitroglycerin), because that combination can cause a dangerous drop in blood pressure. If you have heart disease, low blood pressure, liver disease, or take medications for blood pressure, it's a good idea to check with your healthcare professional before combining alcohol with Filitra.