Your patient complains of nausea and has an order which reads, "promethazine 12.5 mg I.V. q 4 hours p.r.n. nausea". The medication label says, "promethazine 25 mg/mL". How many mL will you administer?
Added by Angela C.
Step 1
The order is for 12.5 mg of promethazine, and the concentration of the medication is 25 mg/mL. Therefore, you will need to administer 12.5 mg / 25 mg/mL = 0.5 mL. Show more…
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