Viagra is the trade name and generic name for Sildenafil Citrate. The reference price of a box of 5 tablets of sildenafil citrate is around $429.00. The exact price can be affected by different manufacturers, different regions and other factors. If you need to use this drug, you need to use it under the guidance of your doctor. The specifications of each tablet of Sildenafil Citrate vary from 25mg, 50mg, 100mg. Generally, the reference price of a box of 50mgx5 tablets of Sildenafil Citrate is about 429.00 yuan. The specific price, mainly affected by different manufacturers, different regions and other factors. Sildenafil Citrate is generally used for the treatment of erectile dysfunction, and adverse reactions such as facial edema, fatigue, vomiting, tongue inflammation and thirst can occur after use. The drug is forbidden to be used in combination with nitrate drugs, it is contraindicated in women, people who are allergic to the product, children, and people whose recent cardiovascular state does not allow them to have sex. If you need to use this drug, you need to use it under the supervision of a doctor.