Nizagara treats ED in males. Sildenafil citrate relaxes penile blood vessels and increases blood flow to sustain an erection. History makes Nizagara intriguing. Viagra, created by Pfizer, is its generic equivalent. Nizagara, made by a different firm, is cheaper than Viagra. Nizagara, a generic drug for ED, is popular among men, especially in nations where Viagra is expensive. Its effectiveness and safety are comparable to Viagra, making it an ED therapeutic option.