www.TakeRx.com

www.TakeRx.com



math calculations with Bactrim oral suspension

Calculate the total quantity and the total days supply for the following Rx:
Bactrim pediatric susp
sig: 2 tsp po q8h x 5d
------------------------------------------------------------
The doctor has prescribed an oral suspension and the pharmacist will dispense the generic version sulfamethoxazole/trimethoprim 200mg/40mg per 5mL oral suspension. But, some pharmacists may dispense Sulfatrim pediatric suspension.
The total days supply is 5 days as stated by the doctor.
The sig says: give 2 teaspoonsful by mouth every eight hours for five days
The patient will be taking 2 teaspoonsful three times daily for five days.
Notice that 1 teaspoon = 5 mL and then 2 teaspoons = 10 mL
So, the patient will take 10mL * 3 * 5 which is 150 mL
The total quantity to be dispensed is 150 mL
Calculate the total quantity and the total days supply for the following Rx:
Bactrim pedi
2 tsp bid prn
10 days
------------------------------------------------------------
The sig says: give 2 teaspoonsful by mouth twice daily as needed
The doctor has prescribed Bactrim pediatric suspension, but the pharmacist will very likely dispense the generic version sulfamethoxazole/trimethoprim 200mg/40mg per 5mL oral suspension. But, some pharmacists may dispense Sulfatrim pediatric suspension.
How do we know that the doctor has prescribed an oral suspension?
We know because the sig directions tell the patient to take 2 teaspoonsful.
The patient will take 2 teaspoonsful twice daily, that is, the patient will take 10mL twice daily. In other words, the patient will take 20mL per day.
The total quantity to be dispensed will be 20 mL * 10 days which is 200 mL
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:
Bactrim susp
#300 mL
3 tsp po bid for infection
------------------------------------------------------------
The doctor has prescribed an oral suspension and the pharmacist will dispense the generic version sulfamethoxazole/trimethoprim 200mg/40mg per 5mL oral suspension.
The total quantity to be dispensed is 300 mL
The sig says: take 3 teaspoonsful by mouth twice daily for infection
Notice that 1 tsp = 5 mL and, in turn, 3 tsp = 15 mL
The patient will be taking 15 mL twice daily, that is, the patient will be taking 30mL daily.
The total days supply will be 300 divided by 30 which is 10 days.
Calculate the total quantity and the total days supply for the following Rx:
Bactrim 40/200/5
dispense: Q.S.
sig: 7.5 cc po bid
10 days
------------------------------------------------------------
The doctor has prescribed an oral suspension and the pharmacist will dispense the generic version SMZ-TMP 200mg/40mg per 5mL oral suspension.
SMZ-TMP is the abbreviation for sulfamethoxazole/trimethoprim
The total days supply is 10 days as stated by the doctor.
The sig says: take 7.5 mL by mouth twice daily
The patient will be taking 7.5 mL twice daily for 10 days.
So, the total quantity will be 7.5 * 2 * 10 which is 150 mL
Calculate the total quantity and the total days supply for the following Rx:
Bactrim suspension
#QS
1 1/2 tsp bid x 10 days
------------------------------------------------------------
The doctor has prescribed an oral suspension and the pharmacist will dispense the generic version sulfamethoxazole/trimethoprim 200mg/40mg per 5mL oral suspension.
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
So, the patient will take 3/2 teaspoonsful twice daily.
Notice that 1 tsp = 5 mL
So, the patient will take 3/2 * 5mL * 2 which is 15mL per day.
In other words, the patient will take 15 mL daily for 10 days, that is, the patient will be taking a total of 150mL
So, the total quantity to be dispensed is 150 mL
Calculate the total quantity and the total days supply for the following Rx:
Bactrim 200/40/5
disp: 175 mL
2 1/2 tsp po bid
------------------------------------------------------------
The doctor has prescribed an oral suspension and the pharmacist will dispense the generic version sulfamethoxazole/trimethoprim 200mg/40mg per 5mL oral suspension.
The quantity to be dispensed is 175 mL as stated by the doctor.
The sig says: take two and one-half teaspoonsful by mouth twice a day
Notice that (2 1/2) is equal to 5/2
So, the patient will take 5/2 teaspoonsful twice daily.
Notice that 1 tsp = 5 mL
So, the patient will take 5/2 * 5mL * 2 which is 25mL per day.
The days supply will be 175 divided by 25 which is 7 days.





www.takerx.com
2006