Microsoft word - drugcalcpractice.doc

DOSAGE CALCULATIONS:
ADDITIONAL PRACTICE QUESTIONS
DRUG CALCULATIONS

Using the following Basic Formula can help to simplify drug calculations:
D x V = Dosage Required
H

D = dose desired (i.e. the drug dose ordered by the physician) H = dose on-hand (i.e. the drug dose on the label of the drug container) V = volume (i.e. the form and amount in which the drug comes) When answering the following questions, be sure to: • round off to 2 decimal points for mL and mg (where appropriate) • state the unit of measurement in each answer Each vial contains equivalent of 1500mg Clindamycin. Discard open solution after 24 hours at room temperature 150mg/mL
See enclosure for prescribing information. CAUTION: Federal law prohibits dispensing The physician’s order reads: Clindamycin 300mg IV q8h How many mLs are required for one dose? Vial contains Diazepam equivalent to 10mg. 2.5mg/mL
Discard open solution after 8 hours at room temperature or Read accompanying circular. EXPIRES 09/09/09 The physician’s order reads: Diazepam 10 mg IV stat How many mLs are required for one dose? Vial contains equivalent of 1g Cefazolin. See enclosure for prescribing information. The physician’s order reads: Cefazolin 250 mg IV q8h Each vial contains equivalent of 300mg Ranitidine. Discard open solution after 24 hours at room temperature See enclosure for prescribing information. CAUTION: Federal law prohibits dispensing The physician’s order reads: Ranitidine 50 mg IV over 5 min 400,000 units/ 2mL
Discard open solution after 8 hours at room temperature or The physician’s order reads: Penicillin G 1,000,000 units IV q6h Vial contains equivalent of 1g Tetracycline. 1000mg/ mL
See enclosure for prescribing information. The physician’s order reads: Tetracycline 500 mg IV b.i.d. Each vial contains equivalent of 200mg Acyclovir. Discard open solution after 24 hours at room temperature See enclosure for prescribing information. CAUTION: Federal law prohibits dispensing The physician’s order reads: Acyclovir 175 mg IV over 1 hour How many mLs are required for one dose? Vial contains Heparin equivalent to 100,000units. 10,000 units/mL
Discard open solution after 8 hours at room temperature or Usual Adult Doses: Up to 10,000 units IV The physician’s order reads: Heparin 7500 units IV push Vial contains equivalent of 1g Gentamycin. 100mg/ 2mL
See enclosure for prescribing information. The physician’s order reads: Gentamycin 80 mg IV q8h Vial contains Methylprednisone equivalent to 1000mg. 500mg/mL
Discard open solution after 8 hours at room temperature or CAUTION: Federal law prohibits dispensing without The physician’s order reads: Methylprednisone 175 mg IV q4h DRUG CALCULATIONS ANSWER KEY

(Since you got an answer that goes to many decimal points, this is a case where you should round off to only 2 decimal points) 1,000,000 units X 2 mL = 5 mL

Source: http://blogs.rrc.ca/delaney/wp-content/uploads/2-Drug-Calculations1.pdf