Baiyunshan Jingo is the trade name, generic name is sildenafil citrate tablets, take one capsule about to maintain about 0.5~4 hours, but according to their own conditions. Sildenafil citrate tablets are type 5 phosphodiesterase inhibitors, which can dilate blood vessels, increase the oxygen content of the penile corpus cavernosum, make the blood supply to the penis more adequate, and improve the hardness and duration of erection, which is used for the treatment of erectile dysfunction and delayed ejaculation in men, and so on. Eating one Sildenafil citrate tablet can generally last about 0.5~4 hours. Sildenafil citrate tablets are usually taken about an hour before sex and work better on an empty stomach. Common adverse effects of the drug include headache, indigestion, flushing, and visual disturbances. It is contraindicated in patients taking nitroglycerin. The drug is contraindicated in women, people who are allergic to the product, children, people whose recent cardiovascular state is not suitable for sexual life. It is not recommended for patients with heart failure, low blood pressure. Sildenafil citrate tablets should not be taken in excess, if you experience discomfort, you should seek medical attention.