math calculations with syrup flavored medicated

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math calculations with syrup (2)

What are the total quantity and the total days supply for the following Rx:
Ventolin #4oz
1 tsp po tid
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The sig says: take 1 teaspoonful by mouth three times daily
Notice that the doctor has prescribed Ventolin oral liquid. But, there is no Ventolin oral liquid. So, the pharmacist will dispense the generic version of Ventolin liquid, which is Albuterol 2mg/5mL syrup.
Now, we need to convert 4 oz into mL
1 fluid ounce = 30 mL and, therefore, 4 oz = 120 mL
So, the total quantity to be dispensed is 120 mL as stated by the doctor.
The sig above says for the patient to take 5mL three times daily. In other words, the patient will take 15 mL daily.
The days supply will be 120 mL divided by 15 mL which is 8 days.

Calculate the total quantity and the total days supply for the following Rx:
Albuterol 2/5
qty: 120
2.0 mL po q6-8h prn for cough/whe
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The sig says: take 2 mL by mouth every 6 to 8 hours as needed for cough and wheezing
The sig directions imply that the medication is in the liquid form. In other words, 2mL implies liquid.
In this case, the pharmacist will dispense Albuterol 2mg/5mL syrup.
The total quantity to be dispensed is 120 mL as stated by the doctor.
The patient will be taking 2 mL every 6 to 8 hours. In turn, the maximum dosage the patient may take is 2mL every 6 hours, that is, the patient may take 2mL four times daily. In other words, the patient may take up to 8mL per day.
Then, the total days supply will be 120 mL divided by 8 mL which is 15 days.

Calculate the total quantity and the total days supply for the following Rx:
Zantac 75 mg/5 mL
disp: 1 mos supply
sig: 6 mg po tid
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The doctor has prescribed Zantac 75mg/5mL syrup, but the pharmacist will very likely dispense the generic version Ranitidine 75mg/5mL syrup.
The sig says: take 6 mg by mouth three times daily for one month
But, this is a syrup and therefore we need to calculate how many milliliters (mL) to dispense.
The ratio is 75 mg/5 mL
Notice that 75mg/5mL is the same as 5mL/75mg
x / 6 mg = 5 mL / 75 mg
x = (6 mg * 5 mL) / 75 mg
x = 30 / 75
x = 0.4 mL
The final sig will say: take 0.4 mL by mouth three times daily for 30 days
The quantity to be dispensed will be 0.4 * 3 * 30 which is 36 mL
The days supply is 30 days as stated by the doctor.
Notice that Zantac 75mg/5mL syrup is the same as Zantac 15mg/mL syrup.
Also, notice that Ranitidine 75mg/5mL syrup is the same as Ranitidine 15mg/mL syrup.

Calculate the total quantity and the total days supply for the following Rx:
Depakene syrup
250 mg po bid
#1 month supply
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The doctor has prescribed Depakene 250mg/5mL syrup, but the pharmacist will very likely dispense the generic version Valproic Acid 250mg/5mL syrup.
The sig says: take 250 mg by mouth twice daily
But, this medicine is a syrup and, in turn, we need to convert 250mg into mL
We know that the ratio is 250mg per 5 mL, that is, 250mg/5mL
Notice that 250mg/5mL is the same as 5mL/250mg
x / 250 mg = 5 mL / 250 mg
x = (250mg * 5mL) / 250mg
x = 1250 / 250
x = 5 mL
So, the final sig directions will say: take 5 mL by mouth twice daily
In other words, the patient will take 10 mL per day.
The doctor wants the pharmacist to dispense enough medicine to last 30 days.
So, the total quantity to be dispensed will be 10 * 30 which is 300 mL
The total days supply is 30 days.

Calculate the total quantity and the total days supply for the following Rx:
Clarinex syrup
sig: 1.25 mg qday po #75 mL
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The total quantity to be dispensed is 75 mL as stated by the doctor.
The sig says: take 1.25 mg by mouth every day
The pharmacist will dispense Clarinex 2.5mg/5mL syrup.
Now, we need to convert 1.25 mg into milliliters (mL)
The ratio is 2.5 mg/5 mL
Notice that 2.5mg/5mL is the same as 5mL/2.5mg
x / 1.25 mg = 5 mL / 2.5 mg
x = (1.25mg * 5mL) / 2.5mg
x = 6.25 / 2.5
x = 2.5 mL
The final sig will say: take 2.5 mL by mouth every day
The total days supply will be 75 divided by 2.5 which is 30 days.

What are the total quantity and the total days supply for the following Rx:
Clarinex 0.5mg/mL syrup
dispense 75, days supply = 30 days
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The total quantity to be dispensed is 75 mL as stated by the doctor.
The total days supply is 30 days as stated by the doctor.
In this case, the pharmacist has to figure out the directions for the patient.
If we divide 75 by 30, then we will have 2.5 mL
So, the directions on the label will say:
Take 2.5 mL by mouth every day for 30 days
Notice that Clarinex 0.5mg/mL is the same as Clarinex 2.5mg/5mL

What are the total quantity and the total days supply for the following Rx:
Pancof PD
1/4 teaspoonful hs prn cough
disp: 1 oz
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The doctor has prescribed Pancof PD syrup, but many pharmacists may dispense DiHydro-PE syrup.
The doctor wants the pharmacist to dispense 1 ounce, that is, 30 mL
In turn, the total quantity to be dispensed is 30 mL
The sig says: take one-fourth teaspoon by mouth at bedtime as needed for cough
The patient will take 1/4 teaspoon daily, that is, 0.25 teaspoon daily. In other words, the patient will take 0.25 * 5mL daily, that is, the patient will take 1.25mL per day.
Now, the total days supply will be 30 mL divided by 1.25 mL which is 24 days.
It is worth noting that both Pancof PD syrup and DiHydro-PE syrup are classified as a C-V drug.