Question

the physician orders vitamin b - 12 injections 1 mg im weekly. how many milliliters will be given per dose?

sterile 10 ml. multiple dose vial
ndc 0372 - 0022 - 10
dosage: see package insert
vita - plus b - 12
caution: federal law pro - (cyanocobalamin
hibits dispensing without injection, usp
prescription. 677/0091 1g 1000 mcg/ml
distributed by
scar - tasin pharmacal co., inc.
cranston, ri 02920
each ml contains: cyanoco -
balamin 1000 mcg in isotonic
solution of sodium chloride
preserved with benzyl alcohol
1.5%
sodium acetate and/or acetic
acid added to adjust ph when
necessary.
protect from light.
the nurse practitioner orders 0.3 milligrams im prn of atropine sulfate. how many ml will be given per dose?
. shade the syringe below.

how many milligrams of fentanyl are in 7.5 ml? round to the nearest tenth.

ndc 10019 - 033 - 72
fentanyl
citrate injection, usp
250 mcg/5 ml
50 mcg/ml (0.05 mg/ml)
10 x 5 ml dosftte ampuls
for intravenous
or intramuscular use
r only
each ml contains fentanyl citrate equivalent to 56 mcg
(0.05 mg) fentanyl base in water for injection, ph 4.5 -
6.5. may contain sodium hydroxide and/or citric acid
if needed, for ph adjustment. contains no preservative.
see also container label for complete
prescribing information
protect from light: keep covered in carton until
ready to use.
store at controlled room temperature 15° - 30°c
(59° - 86°f).
to open ampuls, ignore color line; break at
sterile.
dosftte is a registered trademark of a.h. robins
company.

Explanation:

Step1: Calculate B-12 dose volume

Given Vita-Plus B-12 concentration: 1000 mcg/mL = 1 mg/mL. Dose = 1 mg. Volume = $\frac{1\ \text{mg}}{1\ \text{mg/mL}} = 1\ \text{mL}$.

Step2: Calculate atropine dose volume

Atropine concentration: 0.4 mg/mL. Dose = 0.3 mg. Volume = $\frac{0.3\ \text{mg}}{0.4\ \text{mg/mL}} = 0.75\ \text{mL}$.

Step3: Calculate fentanyl mass

Fentanyl concentration: 50 mcg/5 mL = 10 mcg/mL. Volume = 7.5 mL. Mass = $10\ \text{mcg/mL} \times 7.5\ \text{mL} = 75\ \text{mcg} = 0.075\ \text{mg} \approx 0.1\ \text{mg}$ (rounded to nearest tenth).

Answer:

1 mL
0.75 mL
0.1 mg