A steroid called Vidalista 40 is used to increase sexual performance. It is prescribed to men with erectile dysfunction.Causes an erection by increasing blood flow to the penis. An erection can be satisfactory in a healthy man, but not in a patient with erectile dysfunction. When there is sexual urge, excess blood travels to the penis, causing an erection. If the libido is too high, excess blood enters the penis, which leads to emergencies. A person with erectile dysfunction may experience an erection that is not as strong as a normal man, but is still considered satisfactory.