1 Dosage Calculations Worksheet #2 2 1. Ordered: Rocephin 200 mg IV q8h Available: Rocephin 250 mg powered vial Reconstitution: Add 2.4 ml sterile water to yield a total volume of 2.5 ml What is the concentration / ml? 2. Ordered: Ampicillin 800 mg IV QID Available: Ampicillin 1 g powdered vial Reconstitution: Add 9.6 ml NS to yield a total volume of 10 ml What is the concentration/ml? Page 1
2 3. Ordered: Ancef 1.4 g IV BID Available: Ancef 2 g powdered vial Reconstitution: Add 4.4 ml NS Concentration: 370 mg/ml 4. Ordered: Ceftazidime 750 mg IV TID Available: Ceftazidime 2 g powdered vial Reconstitution: Add 7.5 ml NS to yield a total volume of 8 ml Concentration: 250 mg/ml 5. Ordered: Cefazolin 500 mg IV TID Available: Cefazolin 1 g powdered vial Reconstitution: Add 4.8 ml sterile water to yield a total volume of 5 ml Concentration: 200 mg/ml Page 2
3 6. Ordered: Piperacillin 1.4 g IV Q6H Available: Piperacillin 2 g powdered vial Reconstitution: Add 19.6 ml sterile water to yield a total volume of 20 ml What is the Concentration/mL? 7. Ordered: Kefzol 240 mg IM q8h Available: Kefzol 1 g powdered vial Reconstitution: Add 3.7 ml sterile water to yield a total volume of 4 ml Total concentration: 250 mg/ml How much volume is administered per dose (round to the nearest hundredth)? 8. Ordered: Cefotetan 1500 mg IM q8h Available: Cefotetan 2 g powdered vial Reconstitution: Add 3.5 ml sterile water to yield a total volume of 4 ml Total concentration: 500 mg/ml Page 3
4 9. Ordered: Gentamicin 50 mg IM TID Available: Gentamicin 100 mg powered vial Reconstitution: Add 1.8 ml sterile water to yield a total volume of 2 ml What is the concentration/ml? 10. Ordered: Gentamicin 25 mg IM QID Available: Gentamicin 50 mg powered vial Reconstitution: Add 1.3 ml sterile water to yield a total volume of 1.5mL What is the concentration/ml? 11. Ordered: Ampicillin 500 mg IV QID Available: Gentamicin 1 g powered vial Reconstitution: Add 4.5 ml sterile water to yield a concentration of 1000mg/mL Page 4
5 12. Ordered: Amoxicillin 75 mg po TID x 10 days Available: Amoxicillin 2.5 g powdered bottle Reconstitution: Add 88 ml tap water to yield a total volume of 100 ml and a concentration of 25 mg/ ml How many ml/24 hours are administered? How many ml per course of treatment? How many ml are left over in the bottle at the end of the course of treatment? 13. Ordered: Cefotaxime 850 mg IV q12h Available: Cefotaxime 1 g powdered vial Reconstitution: Add 3 ml for a total volume of 3.4 ml Page 5
6 14. Ordered: Duricef 500 mg po BID x 7 days Available: Duricef 7.5 g powdered bottle Reconstitution: Add 62 ml tap water to yield total volume of 75 ml and a concentration of 100 mg/ ml How many ml/24 hours are administered? How many ml per course of treatment? How many ml are left over in the bottle at the end of the course of treatment? 15. Ordered: Cefaclor 250 mg po TID Available: Cefaclor 500 mg powdered vial Reconstitution: Add 3 ml for a total volume of 3.4 ml Page 6
7 16. Ordered: Kefzol 500 mg IV BID Available: Kefzol 600 mg powdered vial Reconstitution: Add 2.5 ml sterile water Concentration: 165 mg/ml 17. Ordered: Ampicillin 125 mg IM q6h Available: Ampicillin 500 mg powdered vial Reconstitution: Add 4.6 ml Sterile water Concentration: 104.2 mg/ml 18. Ordered: Cloxacillin 500 mg IV q12h Available: Cloxacillin 250 mg powdered vial Reconstitution: Add 3.1 ml Normal Saline Concentration: 69.4 mg/ml Page 7
8 19. Ordered: Ancef 2 g IM daily Available: Ancef 4 g powdered vial Reconstitution: Add 3.7 ml Sterile water Concentration: 1052.6 mg/ml 20. Ordered: Penicillin G 200,000 units IV QID Available: Penicillin G 600,000 units powdered vial Reconstitution: Add 5.5 ml Normal Saline Concentration: 100,000 units/ml Page 8
9 ANSWERS: 1. 100 mg / ml; 2 ml 2. 100 mg / ml; 8 ml 3. 3.8 ml/dose 4. 3 ml/dose 5. 2.5 ml/dose 6. 100 mg/ml; 14 ml/dose Page 9
10 7. 0.96 ml 8. 3 ml/dose 9. 1 ml/dose; 50 mg/ml 10. 0.75 ml; 33.3 mg/ml 11. 0.5 ml/dose 12. 3 ml/dose; 9 ml/24 hours; 90 ml/10 days; 10 ml Page 10
11 13. 2.9 ml/dose 14. 5 ml/dose; 10 ml/24 hours; 70 ml/7 days; 5 ml 15. 1.7 ml/dose 16. 3 ml/dose 17. 1.2 ml/dose 18. 7.2 ml/dose Page 11
12 19. 1.9 ml/dose 20. 2 ml/dose Page 12