Lesson 23 - Dosage Calculation Methods 100% Pass

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Lesson 23 - Dosage Calculation Methods 100% Pass The physician has ordered Phenobarbital 1mg/kg tid. The child weighs 54lbs. What is the correct dosage for the patient? ✔✔25mg 54lbs / 2.2 = 24.5kg = 25kg (25kg)/(Xmg) * (1mg)/(1kg) = 25mg How many milliliters are in a liter? ✔✔1,000 mL The prescription reads 500mg q12h x 10d. The medication is 250mg tabs. How many tablets will be dispensed? ✔✔40 Q12h = every 12 hours = twice daily 2 tabs * 2 daily = 4 tabs a day 10d = 10 days 4 tabs * 10 day = 40 tabs total dispensed What is 212 degrees Fahrenheit in Celsius? ✔✔100 Degrees Celsius (number of degrees F - 32) / 1.8 is the standard formula to convert from F to C. (212-32) / 1.8 = 100 How many tablets are dispensed in a Z-pack? ✔✔6 tablets Z pack's are typically composed of 6 tablets. Take 2 tablets stat, and then 1 tablet every day thereafter until gone A prescription order has been written for Glucophage 1mg BID c meals. The medication is available in 500mg tablets. How many tablets will patient take per dose? ✔✔2 Tabs Convert grams to mg's 1gm = 1000mg (1000mg)/(X tab) * (1 tab)/(500mg) = 2 tabs A patient comes in with a prescription for Methadone Liquid that has written 4 months ago. What should the pharmacy technician do? ✔✔Tell the patient that unfortunately you cannot fill the script What would Omeprazole be prescribed for? ✔✔Heart Burn The order is 150ml to be infused at 25gtts/min. The drop factor is 20gtts/ml. How long will it take for all the 150ml to be infused? ✔✔2 hrs (150ml * 20gtts) / (25 min) = 3000/25 = 2 hours The doctor orders 100mcg qd to be given to a 45 year old patient weighing 135lbs. The drug is available in 120mcg/0.6ml. How many ml's will be given? ✔✔0.5ml (100mcg)/(Xml) * (0.6ml)/(120mcg) = 60/120 = 0.5ml The physician has ordered 0.8mg/ml to be given BID. The medication is available at 0.4mg/ml. What is the dosage amount to given? ✔✔2ml (0.8ml)/(Xml) * (0.4ml) = (0.8)/(0.4) =2ml The physician has ordered the patient to receive 750ml of NS q6h. What flow rate should the pump be set for ml/hr? ✔✔125ml/hr 750ml/6hr = 125ml/hr The physician has prescribed Amoxicillin for a two year old patient. The adult dosage is 500mg tid. What is the child's dosage? ✔✔71.4mg Formula is: (Age in years / (age in years + 12)) * (average adult dose) 2yrs = (2 / (2+12)) * (500) = 71.4 The pharmacy receives an order for medication to be taken BID x 7 days and then QD x 21 days. How many tablets will be dispensed? ✔✔35 BID = twice daily 2 * 7 = 14 QD = once daily 1* 21 = 21 14 + 21 = 35 The pharmacy receives an order for Augmentin 500mg TID. This medication is available 125mg/5ml. What is the volume of medication to be given with each dosage? ✔✔20ml (500mg) / (Xmg) * (5ml) / (125mg) = 2500/125 = 20ml

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