Viagra belongs to the trade name, generic name sildenafil tablets, than sildenafil tablets are also powerful ten kinds of food is not really exist, there is no such statement. Food can not replace the drug treatment of disease, through the dietary regimen, can only supplement the body needs nutrition, can not achieve the purpose of treatment of disease, so this statement is not true, and does not have a scientific basis. If men have erectile dysfunction, can follow the doctor’s advice to take sildenafil tablets, this product is cyclic guanosine monophosphate specific type 5 phosphodiesterase selective inhibitors, after the use of the drug can make the penis normal erection, improve the hardness of the erection and so on, can to a certain extent to improve sexual function. But remember, if you are allergic to sildenafil, it should be prohibited; women, children, and those who are using nitrate drugs, also need to be prohibited. The drug is a prescription drug and should be applied in strict accordance with medical advice.