A nurse is preparing to administer cyanocobalamin 100 mcg IM monthly. Available is cyanocobalamin injection 1,000 mcg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Determine the desired dosage: The nurse needs to administer 100 mcg of cyanocobalamin. Determine the volume per dose: The cyanocobalamin injection contains 1000 mcg per 1 mL. The nurse needs to administer 100 mcg per dose. To find the volume per dose, we can set up a proportion: 1000 mcg / 1 mL = 100 mcg / x mL Cross-multiplying gives us: 1000x = 100 Dividing both sides by 1000, we get: x = 0.1 mL