He or she will then go through an extensive search for all possible causes of the problem, starting with the list of medicines and drugs you use. Viagra was developed to treat heart disease, but during its premarketing trials the subjects noticed they were having erections. It didn't take Pfizer long to realize what they had stumbled upon. Viagra works best between one and two hours after taking it. As with all medicines, there are potential problems.
Some men report side effects such as headache, flushing and indigestion.
And some men with heart disease should not use it. It must be obtained by prescription, because there are things your doctor needs to know about you before trying it. Before Viagra, many impotent men were able to achieve satisfactory erections by using injections directly into the penis. Although the thought is daunting, the results were worth the effort. These injections are still available and are very effective when used properly.