Calculations Flashcards
1
Q
A 90-year-old man usually takes 150 micrograms of digoxin daily to treat his atrial fibrillation. He has recently developed dysphagia and is finding swallowing tablets to be increasingly difficult. The formulation is changed to digoxin as a 0.005% oral solution.
How many ml of oral solution is required per day to deliver the equivalent dose?
A
0.005% oral solution = 5mg/100ml = 0.05mg/ml
Requires 150 micrograms = 0.15mg
Therefore 3ml
2
Q
What is 7.5 ml in mg?
A
75 (ml = less)
3
Q
What does 2% mean?
A
2% solution = 2g in 100ml = 2000mg in 100ml = 20mg in 1ml
4
Q
What does 1 % mean?
A
1% solution = 1g in 100ml = 1000mg in 100ml = 10mg in 1ml
