NBDE Quiz # 17
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1. Question
. What is the amount of epinephrine (mg) in a 5-mL vial labeled with 1:100,000 epinephrine?
CorrectThe correct answer is B. 1:100,000 means 1 g/100,000 mL. Converting into milligrams, a 1:100,000 solution contains 1,000 mg/100,000mL or 0.01 mg/mL. The concentration 0.01mg/mL in the vial is then multiplied by 5 mL (the volume in the vial) for a total of 0.05-mg epinephrine. If the vial had a volume of 1 mL, 0.01 mg would be correct.
IncorrectThe correct answer is B. 1:100,000 means 1 g/100,000 mL. Converting into milligrams, a 1:100,000 solution contains 1,000 mg/100,000mL or 0.01 mg/mL. The concentration 0.01mg/mL in the vial is then multiplied by 5 mL (the volume in the vial) for a total of 0.05-mg epinephrine. If the vial had a volume of 1 mL, 0.01 mg would be correct.