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math calculations with NovoLog insulin
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Calculate the total quantity and the total days supply for the following Rx: novolog 70/30 15 units bid disp: 6 bottles ------------------------------------------------------------ The doctor has prescribed 6 bottles of NovoLog Mix 70/30 Each vial of NovoLog Mix has 10 mL of insulin. 1 vial = 10 mL and then 6 vials = 60 mL So, the total quantity to be dispensed is 60 mL The sig says: inject 15 units subcutaneously twice daily In other words, the patient will inject 30 units per day. Now, we need to convert 30 units into mL We know that the ratio is 1mL/100U x / 30U = 1mL / 100U x = (30 * 1) / 100 x = 0.3 mL So, the patient will inject 0.3 mL per day. Now, the total days supply will be 60mL divided by 0.3mL which is 200 days. On the other hand, most insurance companies will not pay for 6 vials of NovoLog all at once. So, the patient will very likely be forced by the insurance company to get one vial at a time. We know that the patient needs to inject 0.3 mL of insulin per day. How much insulin does the patient need in one month? The patient will inject 0.3 mL * 30 days which means the patient will inject 9mL per month. In this case, the pharmacist will dispense one vial every mouth. So, the patient will pick up at the pharmacy one vial every month during a period of six months. In this case, the total quantity prescribed will be 60mL, but the total quantity dispensed will be 10mL and the total days supply will be 30 days. The bottom line is that insurance companies often impose restrictions and limitations on patients. |
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Calculate the total quantity and the total days supply for the following Rx: Novolog mix 70/30 flexpen susp sig: 35U in am and 25U in pm disp: 18 ------------------------------------------------------------ The doctor has prescribed NovoLog mix 70/30 flexpen prefilled syringe. The package comes with 5x3mL prefilled syringes. So, the sealed package has 15mL of insulin. We know that one sealed package has 15 mL of insulin, but the doctor wants the pharmacist to dispense 18 mL In this case, the pharmacist will have to dispense two sealed packages, that is, 30mL So, the total quantity to be dispensed is 30 mL The sig says: inject 35 units subcutaneously in the morning and 25 units in the evening The patient has to inject 60 units per day. We need to convert 60 units into milliliters (mL) We know the ratio 1 mL per 100 U x / 60U = 1mL / 100U x = (60U * 1mL) / 100U x = 0.6 mL So, the patient has to inject 0.6 mL per day. The total days supply will be 30mL divided by 0.6mL which is 50 days. |
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Calculate the total quantity and the total days supply for the following Rx: Novolog 70/30 flexpen 20U AM and 10U PM disp: QS for 1 mo refill 3 ------------------------------------------------------------ The doctor has prescribed NovoLog mix 70/30 flexpen prefilled syringe. The package comes with 5x3mL prefilled syringes. So, the sealed package has 15mL of insulin. The sig says: inject 20 units subcutaneously in the morning and 10 units in the evening The patient has to inject 30 units per day. We need to convert 30 units into mL We know the ratio 1mL/100U x / 30U = 1mL / 100U x = (30 * 1) / 100 x = 0.3 mL So, the patient has to inject 0.3 mL per day. The doctor says for the pharmacy to dispense sufficient quantity for 30 days. In this case, the patient will inject 0.3 * 30 which is 9 mL per month. Notice that the patient only needs 9 mL of insulin per month, but the patient will have to get the sealed package of 15mL So, the total quantity to be dispensed is 15 mL The total days supply is 30 days as stated by the doctor. Also, notice that the doctor has given 3 refills. In other words, the patient will get 3 additional packages of Novolog, but one package every month. |
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