D/H x V = amount to give (this is our formula to find out our drug calculation)
Dose you want to give/ Dose on hand x vehicle = amount
So, let's plug in our numbers for our equation:
The dose we want to give is 2.5mg
Those dose we have on hand is 5mg/1mL
It's in a 1mL "vehicle"....We'll set up the equation now.
2.5mg/ 5mg x 1
2.5 ÷ 5 = 0.5
0.5 x 1
So, you'll want to give .5mg for this patient.