COBOLMIN 500MCG INJWhat Is Cobolmin 500 mcg Injection? Active Ingredient: Mecobalamin (also known as methylcobalamin), a coenzyme form of vitamin B. Strength: 500 g per ampoule (commonly 1 mL). Form: Injectable solution (ampoules)suitable for IM or IV use. Indications and Uses Cobolmin 500 mcg is typically prescribed for: Megaloblastic anemia caused by vitamin B deficiency (such as pernicious anemia). Peripheral neuropathies, especially nerve damage in hands and feet.