Question

demerol 60 mg is ordered. you have 75 mg per 1 ml on hand. how many milliliters should you administer to the patient per dose? 0.16 0.4 0.8 8

Explanation:

Step1: Identify the formula for dosage calculation

The formula to calculate the volume (in milliliters) to administer is: \( \text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Dose on Hand (mg/mL)}} \)

Step2: Substitute the given values

Desired Dose = 60 mg, Dose on Hand = 75 mg/mL. So we substitute into the formula: \( \text{Volume} = \frac{60}{75} \)

Step3: Perform the division

\( \frac{60}{75} = 0.8 \)? Wait, no, wait. Wait, 60 divided by 75: let's calculate that. 60 ÷ 75 = 0.8? Wait, no, 75 × 0.8 = 60? Wait, 75 × 0.8 = 60. Wait, but let's check again. Wait, the formula is Desired over Have times Volume. Wait, the standard formula is \( \text{Volume} = \frac{\text{Desired}}{\text{Have}} \times \text{Vehicle Volume} \). Here, the vehicle volume is 1 mL (since it's 75 mg per 1 mL). So \( \text{Volume} = \frac{60\ \text{mg}}{75\ \text{mg/mL}} \times 1\ \text{mL} \). So \( \frac{60}{75} = 0.8 \)? Wait, but 60 divided by 75: 60 ÷ 75 = 0.8. Wait, but let's check the options. The options are 0.16, 0.4, 0.8, 8. So 0.8 is one of the options. Wait, but let's recalculate. 60 divided by 75: divide numerator and denominator by 15: 4/5 = 0.8. Yes, so the volume is 0.8 mL.

Answer:

0.8