Sometimes, Viagra doesn’t have the effects that are supposed to occur in patients. This is unusual, but possible. There are many reasons for this, and it is vital to know all the options before purchasing this medicine. Some patients don’t trust that it can work for them, and this makes it harder to prescribe the medication. Viagra works when the man is sexually excited. Because the drug works to renew the chemical imbalance in the brain, it should be taken 30 minutes to an hour before having sex, and will look no different to an erection that has happened without the assistance of Viagra. Since the introduction of Viagra in 1993 it has an 80 percent success rate with the maximum draught. For the patients who are unsuccessful with the treatment, it is vital to note that Viagra does not directly cause an erection. There has to be some level of sexual excitement before the chemical process can commence. Besides, both sexual partners must have an equal desire for making sex. Many men believe that they need Viagra to succeed in an erection without needing to be fully aroused. Intimacy alone will not help Viagra to work, as the mind is to desire the act before the blood flow to the phallus can be increased. If the partner isn’t willing to have sex, then it is improbable that the patient will be stimulated enough for Viagra to work. Discussing the issue with your partner, and searching for all the information together can bring both partners closer, help them understand and finally raise knowledge and sexual desire for each other. Taking Viagra half an hour before sex, and engaging in acts that excite desire can have the better outcome from the medication. Thus, the more excited both partners are, the more likely Viagra is to function correctly to achieve and keep an erection without the desire decreasing. Mental causes may also prevent Viagra from functioning adequately. It is a usual issue for patients suffering from erectile dysfunction to as well suffer from depression or disquietness. It is the discomfort suffered by the man that prevents sexual satisfaction. If the patient is uncomfortable due to the stigma often attached to males who suffer from erectile dysfunction, then this could have adverse results even with Viagra. Other causes such as interruptions, or disbelief in the treatment could mean that an erection is not possible, and these causes should be addressed before the general practitioner prescribes Viagra. Viagra is prescribed to assist men of all ages and many levels of erectile dysfunction get and keep an erection for some hours. It is one of the most famous erectile dysfunction drug in the world that has a high success rate. It doesn’t have to be an issue, and with the correct knowledge, sexual satisfaction is within your grasp.