Slurring of words

Slurring your words could be a symptom of a number of conditions. One of those is that your carotid arteries are blocked. This could either be the interior branch that carries blood to the brain, or the exterior branch that takes it to the tongue.
Vision Loss

Vision loss is a symptom of a clogged exterior branch of the carotid artery. This could be in one or both eyes. If you are experiencing sudden decreased capacity to see or blurred vision, see your doctor right away.