Jingo is the trade name and the generic name is Sildenafil Citrate Tablets, this product is to be taken up to 1 time per day, there is no specific limit to the number of days per month, and the medication should be taken as prescribed by a doctor. The instructions for Sildenafil Citrate Tablets state that the drug is to be taken up to once a day, with no specified duration of the course of medication. It should be decided by the doctor according to the degree of illness, personal tolerance and other factors, not blindly use the drug on their own. Sildenafil citrate tablets are used to treat erectile dysfunction. This product headache, flushing, back pain, myalgia, abnormal vision, dyspepsia, nausea, nasal congestion, dizziness, rash. The drug is contraindicated for those taking nitrate drugs, guanylate cyclase agonists, and those who are allergic to the product. The drug should be used rationally under the guidance of a doctor.