Difficult grains to milliliter dosage prob

Rationale:

Convert grains to milligrams: 1/15 gr × 60 mg = 4 mg Then use the formula to calculate the correct dose:

Morphine sulfate, 2.5 mg intravenous piggyback in 10 mL of normal saline, is prescribed. The medication label reads "1/15 gr per mL." The nurse should add how many milliliters of morphine sulfate to the 10 mL of normal saline solution? 1. 0.6 2. 0.8 3. 1.3 4. 1.6

1

Formula:

Desired --------- × Volume = mL/dose Available 2.5 mg ------ × 1 mL = 0.625 mL 4 mg = .06 mL (rounded)

gr

grain, about 60 mg