Pharmacology Lab Dosage Calculations 8 Practice wk 8 Mokena PDF

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Practice Dosage Calc for Pharm Lab...

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Name: _____________________________________ ____________________________

Date:

Pharmacology Lab Dosage and Calculations Practice Week 8

Directions: Calculate each mathematical question using the appropriate equations for each. Remember to add the correct metrics with your answer. SHOW YOUR WORK/ COMPUTATION. Not showing your work would mean no credit for this homework.

1) Lanoxin 0.02 mg is ordered. The bottle is labeled 50 mcg/ml. How many milliliters would you give? Xml= 1 ml/50mcg x 1000mcg/1mg x 0.02mg= 0.4 mL

2) A client is ordered 200 milligrams of Amoxicillin trihydrate orally. The medication is available in 250 milligrams in 5 milliliters of syrup. How many milliliters will you administer? Xml= 5ml/250mg x 200mg/1= 4ml

3) A client is ordered 10 milligrams of Thioridazine orally. The supply is 50 milligrams in 5 milliliters of suspension. How many milliliters will you administer? Xml= 5ml/50mg x 10mg/1= 1 ml

4) A client is ordered 75 milligrams of Aminophylline intravenously. It is available in 250 milligrams in 10 milliliters of liquid for IV Injection. How many milliliters will you administer?

Xml= 10ml/250mg x 75mg/1=3 ml

5) 1.5 liters of Normal Saline is required to be given over 4 hours. Using an intravenous tubing which delivers 10 drops/mL how many drops per minute will need to be given? Xgtt/min= 10 gtt/1 ml x 1000ml/1L x 1.5L/4 hours x 1 hour/60 minutes= 62.5gtt/min

6) An infant weighs 4 kg. What is the weight in pounds? What is the weight equivalent in grams? Xlb= 2.2lb/1kg x 4 kg= 8.8 lb Xgrams= 1000g/1kg x 4kg= 4000 grams

7) One liter of Dextrose 5% in water is ordered to run for 3 hours. The drop factor is 10gtts/mL. The IV has been running for 1 hour and 15 minutes. The nurse noticed 500 mLs remain in the bag. How many drops per minute are needed so that the IV finishes in the required time? Xgtt/min= 10gtt/ml x 500 ml/105 minutes= 47.6 gtt/min

8) Your patient needs 12,000 units of heparin via subcutaneous route. You have on hand 5000 units/mL. How much will you inject? Xml= 1 ml/5000units x 12000 units= 2.4 mL 9) You have on hand atropine 0.4 mg/mL. You need to administer atropine gr 1/150 IM (intramuscular). How many milliliters will you prepare? Xml= 1 ml/0.4mg x 65 mg/1 gr x 1500gr/1 =

10) The physician orders meperidine HCl 75 mg IM (intramuscular) every 4 to 6 hours prn for a patient admitted with acute cholecystitis. You have on hand meperidine HCl 50 mg/mL. How much will you give?

Xml= 1 ml/50 mg x 75 mg= 1.5 mL

11) Order: Tobramycin 35mg IV every 8 hours for a child who weighs 14kg. The recommended pediatric dosage of tobramycin is 2 to 2.5mg/kg every 8 hours or 1.5 to 1.9 mg/kg every six hours. Supply is 20mg/2mL vial. a. What is the recommended minimum single dosage for this child? __28 mg_______ 2x14=28 b. What is the recommended maximum single dosage for this child? __35mg___ 2.5x14 c. Is the dosage ordered safe? __Yes it is safe______

12) Order: Ceftriaxone 1g IV every 12 hours for a child who weighs 20 pounds. The recommended pediatric dosage of ceftriaxone is a total daily dosage of 50 to 75 mg/kg given once a day (or in equally divided doses twice a day). Ceftriaxone is supplied in 1g per 50mL single dose container. a. Convert the child’s weight in kilogram?____9kg _____________

Xkg= 1 kg/2.2 lb x 20 lb= 9 kg

b. What is the recommended minimum daily dosage for this child? __450 mg__ 9x50=450 c. What is the recommended minimum single dosage for this child? __450 mg__ 9x50=450 d. What is the recommended maximum daily dosage for this child? ___675mg_____ 9x75=675 e. What is the recommended maximum single dosage for this child? __675 mg_______ 9x75=675

13) Order: LR 250mL at 50mL/h

Drop factor is 60gtt/mL. How many drops per minute? __50 gtt/min______ Xgtt/min= 60gtt/1ml x 50 ml/1 hr x 1 hour/60 minutes

14) Ampicillin is labeled 250 mg/ 5 ml and comes in a bottle containing 120 ml. A child is discharged on 250 mg q 6 hours. How many tsp. would you instruct the mother to give every 6 hours? How many days will the bottle last if the child receives the medicine q 6 hours? ________________ 1 tsp=5 ml Xtsp= 1 tsp/5 ml x 5 ml/250mg

10ml

15) MD writes an order for Ibuprofen 3 mg/kg by mouth every 6 hours for pain for a child. The child weighs 73 lb. Pharmacy dispenses you with 50 mg/2 ml. How many ml will you administer per dose?

Xkg=1 kg/2.2lb x 73 lb=33 kg Xml= 2 ml/50 mg x 3 mg/1 kg x 33kg= 3.96 ml

16) MD writes an order for Nystatin Oral Suspension 250,000 units by mouth every 6 hours for thrust in mouth. Pharmacy dispense you with 500,000 units/5ml. How many ml will you administer per dose?

Xml= 5 ml/500,000 units x 250,000 units/1 =2.5 mL

17) Order: dicloxacillin sodium 125 mg p.o. every 6 h for a child who weighs 55 lbs. The recommended dosage of dicloxacillin sodium for children weighing less than 40kg is 12.5 to 25mg/kg/day p.o. in equally divided doses every 6h for moderate to severe infections. What is the recommended minimum daily dosage for this child? Xkg=1 kg/2.2lb x 55 lb/1=25 kg 12.5 x 25kg= 312.5 mg a day

18) The doctor ordered Nafcillin 640 mg IV q 6 hours. The bottle comes labeled Nafcillin 1 gm/4 mls. How many mL would you give? ______________ Xml= 4ml/1g x 1g/1000mg x 640mg= 2.56 ml

19) Your patient is 5 years old and weighs 40 pounds. The doctor orders Tylenol 10mg/kg. The bottle is labeled 160 mg/5ml. How many ml of Tylenol would you give?__________________ Xkg= 1 kg/2.2lb x 40lb=18 kg Xml= 5ml/160mg x 10mg/1kg x 18kg/1= 5.625 ml

20) At 1600 hours, the nurse started D5W 2 Liters at 100 mL/h. Calculate the infusion time. At what time will you expect the infusion to finish? 2000ml/100 ml 0300

21) A patient weighs 100lbs. The order calls for 0.6mg/kg body weight PO daily. How many milligrams of this drug will this patient receive? Xkg= 1 kg/2.2lb x 100lb/1=45 kg 0.6 x 45=27 mg

22) Order: Rocephin (ceftriaxone) 25mg/kg /dose . Administer via intravenous route q 12h. The patient is a child who weighs 30 pounds. a) How many milligrams of this drug will this patient receive per dose? 13kg 25x13=325 mg b) How many milligrams will this patient receive in 24 hours? 325 x 2=650mg

23) Narcan (naloxone hydrochloride) 0.01mg/kg subcutaneous route stat for a neonate who weighs 3,300grams. The strength available is 0.4mg/mL. How many mL will you administer? 3.3kg Xml= 1 ml/0.4mg x 0.01mg/1 kg x 3.3kg= 0.0825 mL

24) Piperacillin 3.375 mg in 250 mL Normal Saline IVPB q12h over 3 hours 45 minutes. Drop factor is 15gtt/mL. a) What is the flow rate in mL/h?

Xml/hr= 15gtt/1 ml x 250ml/3.75 hours= 1000ml/hr

b) How many gtts/min will you regulate the IV fluid? 1000/60=17 gtt/min

25) Order: Biaxin(clarithromycin) 0.5G PO q12h. The medication comes in powdered form 250mg/teaspoon. Directions: Add 100 mL water and mix thoroughly.How many mL will you administer? Xml= 5 ml/1 tsp x 1 tsp/250mg x 1000mg/1 gram x 0.5 grams= 10ml

26) Zovirax (acyclovir) 200 mg PO q4h while awake for 10 days. How many grams of this antiviral drug will this patient received in total after 7 days? 200 x 7=1,400 mg 1,400mgx10=14,000 mg

27) Order: Ampicillin 250mg IM q6h. The directions of the 1gram vial state to add 3.5mL of diluents yielding 250mg/mL and use the solution within 1hour. How many mL of this antibiotic will you administer? 1ml 28) At 1800 hours, the prescriber ordered 1 unit platelet (275mL) to infuse in 30 minutes. The IV tubing has a drop factor of 10gtt/mL. How many drops per minute will you regulate the fluid? Xgtt/min= 10gtt/1ml x 275 ml/ 30 minutes= 92 gtt/min 29) Order: Panadol 15 mg/kg/dose PO every 4h p.r.n. for temperature of 101.6°F or greater. The child’s weight is 70.4 lbs. Panadol is available in100mL suspension bottle (0.125 G/5mL). How many milliliters will you administer? Xkg= 1 kg/2.2 lb x 70.4 lb = 32 kg Xml= 5 ml/0.125g x 1g/1000mg x 15mg/1kg x 32kg=2,400/125=19.2 mL

30) Order: Rocephin (ceftriaxone) 1g IV q 12h . The patient is a child who has an infection and weighs 30 pounds. The recommended dose is 50-75mg/kg/day given once a day, or daily in two divided doses, not to exceed 2g/day. Is the prescribed order safe? Xkg= 1 kg/2.2lb x 30 lb=14 kg 75 x 14= 1,050mg Yes it is safe...