Sometimes zymaxid is used to treat bacterial conjunctivitis or pink eye. A generic version of zymaxid may be available in the future, Allergan, the makers of zymaxid, will lose their patent in 2016 and then the active ingredient called gatifloxacin would be the generic equivalent eye drops. Read more about generic zymaxid drops.
The longer answer is that vitamins, especially the B vitamins (thiamine, riboflavin, niacin, pantothenic acid, Vitamin B6, biotin, and folic acid) do contribute to energy metabolism, by helping your body turn carbohydrates, proteins, and fats into utilizable energy.
Vitamin B-9 also aids in the continual cell growth needed to give rise to new red blood cells, because it helps you metabolize proteins and DNA. A deficiency in either vitamin B-12 or vitamin B-9 can cause pernicious anemia, which can cause a rapid heart rate, weight loss, irritability and fatigue. Your diet should include 2.4 micrograms of vitamin B-12 and 400 micrograms of vitamin B-9 each day to prevent a deficiency.