The prescribing clinician orders aluminum hydroxide 20 mL PO

The prescribing clinician orders aluminum hydroxide 20 mL PO QID. The pharmacy sends aluminum hydroxide, 320 mg per 5 mL. How many mg will the patient receive per dose?

Solution

D- Dosage desired = 0.05 g
H- Dosage on hand- 20 mg/ tablet
Q- Dosage quantity = 1 tablet
x -amt of tablets patient receives.
(first get D & H to match in units. Convert)
0.05 g (move decimal 3 pts to the right to get mg)
0.05 g = 50 mg (now plug into equation)
50 mg (mg cancel out, do division)
_______ X 1 tablet = X
20 mg
2.5 X 1 tablet = 2.5 tabs administered to patient
Solved with the formula method.