One very good medication for erectile dysfunction is Vilitra 20mg tablet. vardenafil, an ingredient in this medication, aids in boosting blood flow to men's penile tissues. Only men who are at least eighteen years old should use this medication. This medication has a 36-hour half-life. Take this medication an hour before sexual activity. This medication can be taken with water, but avoid breaking or chewing the tablet. Follow your doctor's advice when taking this medication. This medication can be taken either before or after a meal. While taking this medication, avoid consuming cold beverages and fatty foods as they will decrease the medication's effectiveness.