Jingo is the trade name, the generic name is sildenafil citrate, the general recommended dose of 50mg / time, 25mg specification of half a capsule at a time whether it is effective depends on the individual. Sildenafil citrate is a cyclic guanosine monophosphate specific phosphodiesterase 5 inhibitor, which can promote cavernous smooth muscle relaxation, blood inflow, and penile erection in the presence of sexual stimulation. It can be used to treat penile erectile dysfunction. The usual recommended dose of Sildenafil Citrate 25mg is 50mg/dose (2 capsules/dose) used up to once daily. This may be increased to a maximum of 100mg/dose (4 capsules/dose) or decreased to 25mg/dose (1 capsule/dose) depending on the effectiveness of the medication and the individual’s tolerance level. Sildenafil 25mg taken half a capsule at a time may not always be effective, and may be started at the recommended dose, and dose adjustments may be considered depending on individual circumstances. Sildenafil citrate should not be used in combination with nitrates such as isosorbide nitrate, and is also used with caution in people with underlying cardiovascular disease. Use may cause adverse reactions such as headache, flushing indigestion, and visual abnormalities. Sildenafil Citrate should be used under the supervision of a physician, and if significant discomfort occurs during use, seek medical attention.