Glaucoma is a group of eye conditions in which fluid builds up in your eye causing gradual vision loss. Ocular migraine Ocular migraine usually refers to a type of migraine that can cause temporary blindness in one eye.
Increased Blood Pressure. The combination of caffeine and ephedrine can increase your blood pressure. Ephedrine and caffeine stimulate your sympathetic nervous system by increasing neurotransmitters, such as norepinephrine. This stimulant effect can increase your blood pressure by constricting your blood vessels. This is why many diet pill formulas, often called an ECA stack, contain ephedrine, caffeine and aspirin to thin your blood to offset the blood vessel constriction.
Close-up of an assortment of vitamins. Photo Credit manu10319/iStock/Getty Images. Your body maintains a delicate balance with your blood to ensure you have enough blood and that it is not too thick or too thin. Over time, excess cholesterol or clotting factors in your blood can make your blood thicker and more likely to clot -- an occurrence that can lead to a heart attack or stroke. While your physician may prescribe medications to thin the blood, certain vitamins also have been shown to have blood-thinning effects.