7 Integrated Pharmacy Math Practice Free Online FlashCards

Convert $0.75\ \mathrm{g}$ to milligrams.

$0.75\ \mathrm{g}\times1{,}000\frac{\mathrm{mg}}{\mathrm{g}}=750\ \mathrm{mg}$.

How many micrograms are in $1\ \mathrm{mg}$?

$1\ \mathrm{mg}=1{,}000\ \mathrm{mcg}$.

What is the concentration in $250\ \mathrm{mg}$ per $5\ \mathrm{mL}$?

$\frac{250\ \mathrm{mg}}{5\ \mathrm{mL}}=50\frac{\mathrm{mg}}{\mathrm{mL}}$.

What does a $1\%\ \mathrm{w/v}$ concentration mean?

$1\%\ \mathrm{w/v}=1\ \mathrm{g}$ per $100\ \mathrm{mL}=10\frac{\mathrm{mg}}{\mathrm{mL}}$.

How many $250\ \mathrm{mg}$ tablets correspond to $0.75\ \mathrm{g}$?

$0.75\ \mathrm{g}=750\ \mathrm{mg}$, and $750\ \mathrm{mg}\div250\frac{\mathrm{mg}}{\mathrm{tablet}}=3$ tablets.

What volume contains $375\ \mathrm{mg}$ when the liquid has $250\ \mathrm{mg}$ per $5\ \mathrm{mL}$?

$\frac{250\ \mathrm{mg}}{5\ \mathrm{mL}}=\frac{375\ \mathrm{mg}}{x\ \mathrm{mL}}$, so $x=7.5\ \mathrm{mL}$.

What volume provides $240\ \mathrm{mg}$ from liquid containing $120\ \mathrm{mg}$ per $5\ \mathrm{mL}$?

$240\ \mathrm{mg}\times\frac{5\ \mathrm{mL}}{120\ \mathrm{mg}}=10\ \mathrm{mL}$.

Convert $2\%\ \mathrm{w/v}$ to milligrams per milliliter.

$2\%\ \mathrm{w/v}=2\ \mathrm{g}$ per $100\ \mathrm{mL}=20\frac{\mathrm{mg}}{\mathrm{mL}}$.

How many milligrams are in $3.75\ \mathrm{mL}$ of a $2\%\ \mathrm{w/v}$ solution?

$3.75\ \mathrm{mL}\times20\frac{\mathrm{mg}}{\mathrm{mL}}=75\ \mathrm{mg}$.

What is the days’ supply for $45$ tablets taken as $1\frac{1}{2}$ tablets twice daily?

Daily use is $1.5\times2=3$ tablets; $45\div3=15$ days.

What is the days’ supply of $150\ \mathrm{mL}$ taken as $2.5\ \mathrm{mL}$ three times daily?

Daily use is $2.5\ \mathrm{mL}\times3=7.5\ \mathrm{mL}$; $150\ \mathrm{mL}\div7.5\ \mathrm{mL/day}=20$ days.

How many days will $120$ inhaler actuations last at $2$ puffs four times daily?

Daily use is $2\times4=8$ puffs; $120\div8=15$ days.