Question

Ordered: an antibiotic 600 mg IM q6h daily for a patient with a respiratory infection. Directions for reconstitution: Add 2 mL SW for injection. Each 2.5 mL will contain 1 g of antibiotic. How many ml, will you administer to the nearest tenth of a mL.)? a. What is the concentration of the solution in mg after reconstitution for IM injection? b. Estimated dose: DA equation: c. Evaluation: d. What is the amount (in mL) of water displacement by the powder?

Answer 1

Ordered antibiotic dose 600mg IM 6 hourly daily

Dilution 2 ml of sterile water for reconstitution.

The injection contains 2.5ml per 1gm.

$1000mg \div 2.5 ml = 400mg/ml$

$400mg\times 1.5 =600mg$

We need 600mg So, 1.5ml of antibiotics.

Then we need to dilute it with 2 ml of SW as per instruction. So, the total volume now is 1.5ml +2ml = 3.5ml

Total we will administer 3.5ml of the drug.

After reconstitution, there will be

$600mg \div 3.5ml = 171.42 mg$ (170 mg per ml)

Here, 1.5 ml of water displacement by powder