Like This One of the stranger side effects reported by men who use the anti-impotence drug Viagra is having their vision tinted blue. After taking one of the little blue, diamond-shaped pills, some men report that objects in front of them appear contoured with a fuzzy blue hue.
Users also report that their faces gets hot and excessive blushing occurs.
This leads to a concentration of another chemical that plays an important role in stimulating erections. Cialis is more selective than Viagra, stimulating the enzyme responsible for causing an erection without affecting similar enzymes found in the retina or the skin. A marketing battle royal could be in the offing. Lilly could be pitching it as a better alternative to Viagra by 2002. Wash. But Pfizer isn't worried about Cialis.