Order: Ceftazidime 250 mg IM q12h available tazidime 500 mg. How many milliliter

Question

Order: Ceftazidime 250 mg IM q12h available tazidime 500 mg. How many milliliters will you administer. I don't want just the answer, I need the steps to understand how to derive the answer. Thanks

2 NFU to g cti 7 For LM. or LV. Use CAUTION: Addition of diluent generates pres- sure within the vial. Vent Dilute with at least 5 ml Ster- ction or other o on. SHAKE WELL TO DISSOLVE. Soe literature. For LM, solution-Add 1.5 ml of on approved diluent. SHAKE WELL TO DISSOLVE. Provides an approximate volume of 1.8 mL (280 mg Per mill. For dosope ond odministro. Prior to Reconstitution: Protect from Light, Store at 59, to 86"F After Reconstitution: Store in a refrigerator and use within 7 atre, use within 24 hours. Once reconstituted, light protection is not needed. Each vial con loins: 500 mg of Cehozidine ond 59 mg of Sodium C opproximately 27 mg ( 1.2 mEq) of sodium per If kopt ot room temper- ole. Sodium content" Eli Lilly & Co., Indianapolis, IN 46285, USA Exp. Date/Control No.

Explanation / Answer

1. Correct answer:- 0.90 ml
Solution:- following data are given in question-
-ceftazidime ordered= 250 mg q12h
-In hand (available) = 500 mg
-using below labeled Information:-

IM --> 1g vial --> add 3.0 dilutent --> 3.6 ml available volume --> 280 ceftazidime concentration mg/ml
      
Dosage= D/H×Q
D= dosage prescribed
H= dosage in hand
Q = quantity in one dose

= (250/280)*1
= 0.90 ml

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