Zilu is the trade name and generic name of Sildenafil Citrate Tablets, which is useful in the treatment of erectile dysfunction. Sildenafil citrate is the main clinical treatment for erectile dysfunction in men, which can increase the level of nitric oxide in the cavernous body of the male penis and relax the cavernous body and arteries of the male penis, so that there is an adequate supply of blood to the male penis during erection, which ultimately improves the hardness and duration of the penis erection. It should be contraindicated in persons taking any dosage form of nitrates, either regularly or intermittently. It is contraindicated in people with known hypersensitivity to any of the ingredients in this product. Adverse reactions include headache, flushing, dyspepsia, nasal congestion and visual abnormalities. Visual abnormalities are mildly transient and are mainly characterized by poor vision, increased light perception or blurred vision, depending on the individual. The use of Sildenafil Citrate Tablets should be under the guidance of a medical professional.