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a physician orders diphenhydramaine 50mg im q4 h.the available stock is 25 mg/2ml caculate the amount to dispense

User Youri
by
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2 Answers

1 vote

The dose ordered is diphenhydramine 50 mg IM every 4 hours

The available stock is 25 mg/2 ml

This means each ml of the stock solution contains 12.5 mg of diphenhydramine (25 mg/2ml = 12.5 mg/ml)

To calculate the volume to dispense:

Dose ordered divided by concentration per ml = volume to dispense

50 mg divided by 12.5 mg/ml = 4 ml

So the amount of diphenhydramine 25 mg/2ml stock solution to dispense for a 50 mg IM dose is 4 ml.

In summary:

Dose ordered: diphenhydramine 50 mg IM

Available stock concentration: 25 mg/2 ml (12.5 mg/ml)

Volume to dispense: 50 mg / 12.5 mg/ml = 4 ml

The amount to dispense is 4 ml of the diphenhydramine 25 mg/2ml stock solution to achieve a 50 mg IM dose.

User Pgngp
by
8.1k points
5 votes

Answer:

4mL q4h

Step-by-step explanation:

In order to calculate the amount to dispense, multiply the ordered dose by the dosage available

50 mg x (2mL / 25mg) = 100 mg mL / 25 mg = 4 mL


Dispense 4mL diphenhydramine IM every 4 hours

User Ramesh Vishnoi
by
8.9k points