I “Viagra” chemically named sildenafil citrate, trade name Viagra, is a common drug for the treatment of erectile dysfunction (commonly known as impotence, abbreviated as ED). But many people have some misconceptions about its understanding and use, here to give a brief description and clarification. 1, “Viagra” is “aphrodisiac”? ”Viagra is not “aphrodisiac”, after taking it can not directly trigger or improve sexual desire, only under the sexual stimulation effect (sexual stimulation are audio-visual stimulation, kissing, touching, etc.), so that the male erection more firm, more durable, to achieve satisfaction and sexual life. 2, taking “Viagra” can be addictive? Taking Viagra is not addictive. Drug addiction is a chronic, relapsing, compulsive behavior in which the patient continues to take the drug regardless of the consequences. Addictive drugs can induce euphoria or relieve pain, leading to tolerance, dependence, addiction and relapse, making people “addicted” to them. The Viagra does not have the above side effects, so there is no need to worry about tolerance, not to mention addiction like drug addiction. 3, long-term use of “Viagra” will be resistant to drugs? In the treatment of erectile dysfunction, some patients need long-term medication. So, with the prolongation of the medication, will there be drug resistance phenomenon? Will the drug gradually become ineffective? From some studies and reports at home and abroad, it has not been found to have drug resistance, and many patients can still maintain good results with long-term use. 4. Can Viagra treat both the symptoms and the root cause of the disease? ”The mechanism of action of Viagra is mainly through the expansion of local blood vessels in the penis to improve the erectile hardness of the penis. For some mild patients or patients with mainly psychogenic symptoms, taking Viagra and giving behavioral therapy at the same time can achieve a cure, which is often referred to as “treating both the symptoms and the root cause”; while other patients are unable to remove the root cause and may need long-term medication; especially for patients with other underlying diseases. For some patients with other underlying diseases, such as diabetes, hypertension, etc., it is necessary to actively treat and control the primary disease.