Possible side effects of<unk>  injection include allergic reactions such as hives, difficult breathing; redness of the face; swelling of the arms, hands, feet, ankles or lower legs; extreme thirst; and diarrhea. Less-serious side effects may include headache, dizziness, leg pain, itching, or rash. Treatment of megaloblastic anemia with concurrent vitamin deficiency using vitamers (including<unk> , creates the possibility of hypokalemia due to increased erythropoiesis (red blood cell production) and consequent cellular uptake of potassium upon anemia resolution. When treated with<unk> , patients with Leber's disease may suffer serious optic atrophy, possibly leading to blindness.
Cyanocobalamin
Hydroxocobalamin
Sodium thiosulfate 
Dimethyl methylphosphonate
Acetylcysteine
Selenium disulfide
Disufenton sodium
Fomepizole