math calculations with Amoxil oral suspension

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math calculations with Amoxil oral suspension

What are the total quantity and the total days supply for the following Rx:
Amoxil 200/5
3.5 ml po bid
#50 ml
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The doctor has prescribed Amoxil 200mg/5mL oral suspension, but the pharmacist will very likely dispense the generic version Amoxicillin 200mg/5mL oral suspension.
It is worth noting that the patient is one year old.
The sig says: give 3.5 mL by mouth twice daily
The baby will be given 3.5 mL twice daily, that is, 3.5 * 2 which is 7mL
In other words, the baby will be given 7 mL per day.
The total quantity to be dispensed is 50 mL as stated by the doctor.
The total days supply will be 50 mL divided by 7 mL which is 7 days.

Calculate the total quantity and the total days supply for the following Rx:
Amoxil 125/5
150 mL
1 tsp 3x/d
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The doctor has prescribed Amoxil 125mg/5mL, but the pharmacist will dispense Amoxicillin 125mg/5mL suspension.
The total quantity to be dispensed is 150 mL as stated by the doctor.
The sig says: take 1 teaspoonful by mouth three times per day
Notice that 1 tsp = 5 mL
The patient will take 5 mL three times daily, that is, 15 mL per day.
The total days supply will be 150 divided by 15 which is 10 days.

Calculate the total quantity and the total days supply for the following Rx:
amoxicillin 125 mg/5 mL
sig: 75 mg bid x 10 days
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The doctor has prescribed an oral suspension.
The sig says: take 75 mg by mouth twice daily for 10 days
Now, we need to convert 75 mg into milliliters (mL) by using amoxicillin 125mg/5mL
x / 75 mg = 5 mL / 125 mg
x = (75 mg * 5 mL) / 125 mg
x = 3 mL
The final sig will say: take 3 mL by mouth twice daily for 10 days
So, the patient will take 3 * 2 * 10 which is 60mL
But, amoxicillin 125mg/5mL suspension comes in sizes of 80mL, 100mL or 150mL
In turn, the pharmacist will have to dispense one bottle of 80 mL and, therefore, the total quantity will be 80mL
The total days supply is 10 days as stated by the doctor.

Calculate the total quantity and the total days supply for the following Rx:
Amoxil 50 mg/1mL drops
#30 mL
Sig: 1/2 mL PD TID CF
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PD means pediatric drops. This medicine is a pediatric oral suspension.
This medication is available in bottles of 30mL and comes with 1 mL dropper.
The total quantity is 30 mL as stated by the doctor.
The sig says: give 0.5 mL by mouth three times daily with food
0.5 mL * 3 = 1.5 mL per day
The patient will take 1.5 mL per day
The total days supply will be 30mL divided by 1.5mL which is 20 days.

What are the total quantity and the total days supply for the following Rx:
Amoxil 50mg/mL susp
7 mL po q12h x 10 days
dispense: 140
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Right away, we can say that this drug is not a pediatric drop.
The doctor has prescribed Amoxil 50mg/mL suspension, but the pharmacist will very likely dispense the generic version Amoxicillin 250mg/5mL suspension. Notice that Amoxil 50mg/mL is the same as Amoxil 250mg/5mL
The doctor wants the pharmacist to dispense 140 mL, but the pharmacist will have to dispense one bottle of 150 mL because it does not come in 140 mL
So, the total quantity to be dispensed is 150 mL
The sig says: take 7 mL by mouth every 12 hours for 10 days and then discard the remainder
The total days supply is 10 days as stated by the doctor.

What are the total quantity and the total days supply for the following Rx:
Amoxicillin 400/5
sig: 1 1/4 tsp po bid x 10d
disp: QS
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The doctor has prescribed Amoxicillin 400mg/5mL oral suspension.
The sig says: take one and one-fourth teaspoonsful by mouth twice a day for ten days
Note that 1 1/4 is equal to 5/4
So, the patient will take 5/4 teaspoonsful twice daily for ten days, that is, 5/4 * 5mL * 2 daily * 10 days which is 125mL
But, amoxicillin 400mg/5mL suspension comes in sizes of 50mL, 75mL or 100mL
In turn, the pharmacist will have to dispense two bottles of 75mL each and, therefore, the total quantity will be 150mL
The days supply is 10 days as stated by the doctor.

Calculate the total quantity and the total days supply for the following Rx:
Amoxicillin 400 mg/5 mL
#200
ii 1/2 tsp bid
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The doctor has prescribed an oral suspension.
The total quantity to be dispensed is 200 mL as prescribed by the doctor.
The sig says: take two and one-half teaspoonsful by mouth twice daily
Notice that (2 1/2) is equal to 5/2
In other words, the patient will take 5/2 teaspoonsful twice daily which means the patient will take 5/2 * 5mL * 2
So, the patient will take 25 mL per day.
Now, the total days supply will be 200mL divided by 25mL which is 8 days.
It is worth noting that amoxicillin 400mg/5mL suspension comes in sizes of 50mL, 75mL or 100mL
In turn, the pharmacist will have to dispense two bottles of 100mL

Calculate the total quantity and the total days supply for the following Rx:
Amoxicillin 250 mg/5 mL
1 1/2 tsp bid 10 days
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The total days supply is 10 days as stated by the doctor.
The sig says: take one and one-half teaspoonsful by mouth twice daily for 10 days
Notice that (1 1/2) is equal to 3/2
In other words, the patient has to take 3/2 teaspoonsful twice daily for 10 days which means the patient will take 3/2 * 5mL * 2 * 10
So, the patient will take 150 mL during 10 days.
The total quantity to be dispensed will be 150 mL

Calculate the total quantity and the total days supply for the following Rx:
date: 02/03/2010
Amoxicillin 250mg/5mL susp
sig: 11 mL po 2xday
start date: 02/05/2010
end date: 02/14/2010
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Notice that the doctor wants the patient to start taking the medication on 02/05/2010 and to end the medication on 02/14/2010. There are 10 days from the start date to the end date. In turn, the total days supply will be 10 days.
The sig says: take 11 mL by mouth twice daily for 10 days
The patient will take 11 mL * 2 daily * 10 days, which means the patient will take a total of 220mL
But, Amoxicillin 250mg/5mL suspension is supplied in bottles of 80mL, 100mL, and 150mL
In this case, the pharmacist will dispense 3 bottles of 80 mL, that is, 240 mL
In turn, the total quantity to be dispensed is 240 mL
But, the pharmacist will very likely re-write the sig directions:
take 11 mL by mouth twice daily for 10 days and then discard the remainder

Calculate the total quantity and the total days supply for the following Rx:
Amoxicillin 400mg/5mL
sig: 400 mg po bid x 10d
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The doctor has prescribed Amoxicillin 400mg/5mL oral suspension.
The total days supply is given by the doctor which is 10 days.
The sig says: take 400 mg by mouth twice daily for 10 days
But, this medication is in a liquid form and thus we need to convert 400mg into mL
The ratio for this Amoxicillin is 400mg/5mL or 5mL/400mg
x / 400 mg = 5 mL / 400 mg
x = (400mg * 5mL) / 400mg
x = 2000 / 400
x = 5 mL
The final sig will say: take 5 mL by mouth twice daily for 10 days
The patient will be taking 5 * 2 * 10 which means the patient will take 100mL total.
So, the total quantity to be dispensed is 100 mL

Calculate the total quantity and the total days supply for the following Rx:
amoxicillin 500 mg
#21
1 tid x 7 days
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The doctor prescribed Amoxicillin capsules. So, the pharmacist went ahead and dispensed Amoxicillin capsules as prescribed by the doctor. But, the customer said to the pharmacist that his 10-year-old son would have problem swallowing the capsules. Then, the pharmacist changed it to Amoxicillin suspension.
The pharmacist decided to dispense Amoxicillin 250mg/5mL suspension.
Now, we need to convert Amoxicillin capsules to Amoxicillin suspension.
The total days supply does not change, that is, the total days supply is and will remain 7 days as stated by the doctor.
The sig says: take one capsule by mouth three times daily for seven days
We need to establish a relationship between capsule and suspension.
We know that 1 capsule is 500 mg and we know that the suspension ratio is 250mg/5mL
Then, we need to calculate how much suspension the patient will take.
x / 500 mg = 5 mL / 250 mg
x = (500mg * 5mL) / 250mg
x = 2500 mL / 250
x = 10 mL
So, the patient will have to take 10 mL
Then, the final sig will say:
take 10 mL by mouth three times daily for seven days
In this case, the patient will take 10mL * 3 daily * 7 days which means the patient will take 210mL total.
But, Amoxicillin 250mg/5mL suspension comes in bottles of 80mL or 100mL or 150mL
In this case, the pharmacist dispensed two bottles of 150mL each, that is, 300mL
So, the total quantity dispensed was 300 mL
Then, the pharmacist rewrote the final sig:
take 10 mL by mouth three times daily for seven days only. Discard remainder