Viagra is without a shadow of a doubt one of the most popular medications that have ever been available. Maybe only Aspirin can come close to its popularity, and perhaps heroin, which has become much more popular, or in fact notorious since it became an illegal drug. Yes, it was once a 
regular medication used for cough and pains, but that is a story for another time and place. In any case, Viagra has definitely become one of the most talked about medications of all times and it is due to its media exposure, its uniqueness as the first ED medication that got an approval and its efficiency that it has become that popular.
As a result of this, many men all over the world are using Viagra for their erectile dysfunction and many more are considering starting to take it. One of the aspects that they are most concerned about are the side effects that can occur when taking Viagra. In this article, we will give you an objective and clear picture about the likelihood of different side effects occurring, without sugar-coating them or making them sound more ominous than they are. We will provide you with the cold, scientific facts as we think it is the best way to address this issue.
The first thing that you have to avoid when considering the side effects of Viagra is to believe everything you read on the internet. Namely, there are plenty of manufacturers of different natural ED medications that tend to overemphasize the side effects of Viagra in hop that people will opt for their products out of which not a single one was independently been proven to have any effects on erectile dysfunction. Also, you need to remember that the FDA regulations require the manufacturer of Viagra (and any other medication for that matter) to include absolutely every single side effect on the label, even if it has not been directly connected to Viagra. As long as the side effect has been reported by a single user, it has to be listed.
The most common side effects of Viagra include headaches, flushing, upset stomach, stuffy nose and back pains. Most of these side effects are caused by Viagra having an effect on blood vessels that are located in parts of the body other than the penis. You should also remember that even these side effects occur only in less than 10% of users. Headaches are considered the most common side effect and they can be easily mitigated or avoided altogether by drinking plenty of water and perhaps taking mild painkillers which have first been checked with the doctor or a pharmacist. 
These side effects will go away on their own, but if they continue to bother you and if they change in intensity, you should talk to your doctor.
There are some more serious side effects that have also been reported by users of Viagra but these are exceptionally rare if the medication is taken properly. These side effects include lightheadedness, short breath, priapism (prolonged, painful erections), irregular heartbeat, ringing in the ears, sudden changes or even loss of vision or hearing, swelling in the extremities, chest pains, sweating, pain spreading to the shoulder. If you experience any of the aforementioned, talk to your doctor as soon as possible.