Order: kanamycin sulfate, 150 mg IM q6h
Available: a vial containing 500 mg of kanamycin powder; you will add 4.2mL of sterile hose down, yielding a solution of 100mg = 1mL.
How heaps mL will you prepare for the correct dose?
Formula: Stock desired over stock on hand x volume.
Given: SD=150 mg
SH= 100 mg
Volume: 1 ml
= 150 mg / 100 mg X 1 ml
= 1.5 ml
The dose to be administered will be 1.5 ml q6h.
1.5 mL
You can digit this one out without using the formula. 1ml contains 100 mg dosage, but you obligation 150 mg so you need another .5
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