Before you start using Viagara you should know about two things. First of all, Viagra should be prescribed to you by your doctor. It means that you must not take Viagra without doctor’s consultations. This is because of the next thing – Viagara have side effects. The most distributed side effects of Viagra are:
- headache;
- facial flushing;
- upset stomach;
- bluish vision;
- blurred vision;
- sensitivity to light.
And the last note, uncontrolled taking of Viagra can couse serious desease.
P.S. Funny picture about side effect of Viagra. Be careful 
