Jingo is the trade name for the generic name Sildenafil Citrate, and the main side effects include nausea, vomiting, dizziness, and visual abnormalities. Sildenafil Citrate is used clinically to treat erectile dysfunction. Side effects include headache, nausea, indigestion, vomiting, nasal congestion, back pain, muscle pain, and visual abnormalities. Concurrent application of any dosage form of nitrate and guanylate cyclase agonists (e.g., leucovorin) is prohibited during the medication period; this drug should be contraindicated in people who are allergic to this drug and any of the components in the drug. This drug should be used with caution in patients with cardiovascular and cerebrovascular diseases, and in patients who have suffered from shock or myocardial infarction in the last six months; in patients with sickle cell anemia and retinitis pigmentosa; in men with abnormal erection after taking this drug, they should consult a doctor as soon as possible. It is recommended to follow the doctor’s instructions for the use of this drug, and to consult a doctor as soon as possible if any abnormality occurs.