Renhe Viagra is the trade name and generic name of sildenafil tablets, which has better therapeutic effect on male erectile dysfunction when taken as prescribed by the doctor, but the specific effect needs to be judged according to the absorption of the individual. If the absorption is good, the effect is generally better, if the absorption is poor, you can increase the dose under the guidance of the doctor. Sildenafil tablets are drugs used to treat male erectile dysfunction, taken 1 hour before sex, sexual life under sexual stimulation, can maintain better erectile hardness, can improve the quality of patients’ sexual life. Generally, erectile dysfunction patients are more effective when they take the medication as prescribed by the doctor. However, since each person’s situation is different, the specific effect varies. Symptoms such as blurred vision and nasal congestion may occur after taking sildenafil tablets, and the drug is forbidden to be taken together with nitrate drugs. It is forbidden for people who are allergic to the product, children and other people. The drug should be taken correctly under the guidance of a doctor and in accordance with the dosage, to avoid unauthorized use, which may cause damage to the body.