Jingo is the trade name of sildenafil citrate, which can be used to treat erectile dysfunction, but there are certain side effects and contraindications to its use, and it is recommended that patients use it under the guidance of a doctor. Sildenafil citrate is used for the treatment of male erectile dysfunction, through selective inhibition of PDE5, enhancement of the nitric oxide (NO)-cGMP pathway, elevation of cGMP levels and lead to the relaxation of the penile cavernous smooth muscle, so that patients with erectile dysfunction to produce a natural erectile response to sexual stimulation. It is useful for symptoms such as poor erection hardness and short erection time. However, patients taking sildenafil citrate for a long period of time will have an effect on the body and will experience adverse reactions such as facial flushing, dry mouth and nasal congestion. The drug is forbidden to be used in combination with nitrate drugs, and it is contraindicated for women, people who are allergic to the product, children, and people whose recent cardiovascular status makes them unfit for sexual intercourse. When taking sildenafil citrate, patients are recommended to use it under the guidance of a doctor, and if any discomfort occurs during use, it is recommended to stop the drug immediately and go to the hospital for examination and treatment.