Oral medicines are often used as the first-line therapy for erectile dysfunction. These drugs perform effectively and have minimal adverse effects for most men who have difficulties sustaining an erection hard enough for intercourse (erectile dysfunction). Sildenafil (aurogra 100mg), vardenafil (super vilitra), tadalafil (tadalista 20), and Udenafil (zudena) are oral medications that treat erectile dysfunction by increasing the effects of nitric oxide, a naturally occurring chemical in the body that relaxes penile muscles. This boosts blood flow, allowing you to get an erection in response to sexual stimulation.