Drug dose conversions

Question 1

Aminophylline -> Theophylline

Answer 1

A = T (0.8)

Question 2

Calcium Carbonate -> Elemental Calcium

Answer 2

Calcium carbonate is 40% elemental calcium:

Ca Carb x 0.4 = Elemental Ca

pssst you, yeah you: also remember the absorption is acid dependent so take with food

Question 3

Calcium Citrate (Citracal) -> Elemental Calcium

Answer 3

Calcium citrate is 21% elemental calcium:

Ca Citrate x 0.21 = Elemental Ca

PS: this one’s absorption isn’t acid dependent -> can take with/without food

Question 4

Most insulin conversions are…

Answer 4

1:1

Question 5

Insulin Exception:
NPH dosed BID -> DAILY insulin glargine (Lantus, Basaglar)

Answer 5

Glargine dose = 0.8 (NPH dose)

Question 6

Insulin Exception:
Insulin Levemir (Toujeo ) -> Insulin Glargine (Lantus, Basaglar)

Answer 6

Glargine dose = 0.8 (Levemir dose)

Question 7

Percentage of Elemental Fe in…
Ferrous gluconate

Answer 7

12% Elemental Fe

Question 8

Percentage of Elemental Fe in…
Ferrous sulfate

Answer 8

20% Elemental Fe

Question 9

Percentage of Elemental Fe in…
Ferrous sulfate, dried

Answer 9

30% Elemental Fe

Question 10

Percentage of Elemental Fe in…
Ferrous fumarate

Answer 10

33% Elemental Fe

Question 11

Percentage of Elemental Fe in…
Carbonyl iron
Polysaccharide iron complex
Ferric maltol

Answer 11

100% Elemental Fe

Question 12

5 mL lithium citrate syrup = ____mEq of lithium ion

Answer 12

8 mEq of lithium ion

Question 13

8 mEq of lithium ion = _____mg lithium carbonate tabs/caps

Answer 13

300 mg lithium carbonate

Question 14

Loop diuretic conversion:
___mg furosemide =
___mg torsemide =
___mg bumetanide =
___mg ethacrynic acid

Answer 14

40mg furosemide =
20mg torsemide =
1mg bumetanide =
50mg ethacrynic acid

Question 15

Furosemide IV:PO ratio

Answer 15

1:2