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.
B Vitamins and Serotonin. Getting B vitamins from your diet helps maintain healthy serotonin levels. Vitamins B-1, B-3, B-6 and B-9 all help convert tryptophan, an amino acid you get from protein in your diet, into functional serotonin, explains the Franklin Institute. A deficiency in any of these vitamins can hinder serotonin production, reducing the overall levels of the chemical within your brain.