Question

- The healthcare provider prescribes Amoxicillin 500 mg PO every 8 hours for a child who weighs 77 lbs. The available suspension is labeled, amoxicillin suspension 250 mg/5ml. The recommended maximum dose is 50mg/kg/24hr. How many mL should the nurse administer in a single dose based on the child’s weight?
- A 32- week primigravida who is in preterm labor receives a prescription for an infusion of D5W 500 ml with magnesium sulfate 20 grams at 1 gram/hour. How many ml/hr should the nurse program the infusion pump?
- A loading dose of terbutaline (Bretine) 250 mcg IV is prescribed for a client in preterm labor. Brethine 20 mg is added to 1000 ml D5W. How many ml of the solution should the nurse administer?

Answer #1

Ordered dose(D) = 500 mg Q8H

Dose in hand ( H) = 250 mg

Quantity it is in ( Q) = 5 ml

Amount to be administered (A) = ?

A= D/ H× Q

Child is 77 lbs that is divided by 2.205 we get kg

77 pounds =

34.927 kilograms

So maximum dose is 50/ kg/ 24 hr = 50×24= 1200 mg/ day

So as per docters order 3× 500 = 1500 is to be given but it is not safe so 1200/3 = 400 mg is to be given

So

Ordered dose(D) = 400 mg Q8H

Dose in hand ( H) = 250

Quantity it is in ( Q) = 5

Amount to be administered (A) =?

A= D/ H×Q

Substituting values=

A= 400/250×5

= So 8 mg is to be given in a single dose

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