Jingo and Van Eck are trade names, generic name are sildenafil citrate tablets, theoretically does not have a gap, but the specific efficacy varies from person to person. Sildenafil citrate tablets is a common oral medication for the treatment of erectile dysfunction, there are multiple manufacturers, but the indications, pharmacological effects, etc. are basically the same, generally theoretically can produce the same efficacy, but there is a certain degree of individual variability in the user, resulting in the use of drugs produced by different manufacturers after the results obtained also vary, the specific varies from person to person, and it is impossible to accurately determine the gap. Before using the drug, it should be noted that patients who are allergic to the product, patients who are taking nitrate drugs (including any dosage form), patients who are taking guanylate cyclase agonists (such as levocetirizine) should be contraindicated, and should be used with caution in patients with cardiovascular disease. Mild to moderate adverse reactions, such as visual abnormalities, back pain, myalgia, headache, flushing, nausea, dyspepsia, nasal congestion, and dizziness, are common during treatment with the drug. And the specific use of the drug should be under the guidance of a specialist, not unauthorized use of drugs.