In using the system of household measurements in preparing medications,it is important for the nurse to understand that:

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Household units of measure are familiar to most people.Household measures include drops,teaspoons,tablespoons,and cups for volume,and pints and quarts for weight.
The disadvantage of household measurements is their inaccuracy.Regular household utensils such as teaspoons and drinking cups vary in size.Scales used to measure pints or quarts often are not well-calibrated.When the accuracy of a medication dose is not critical (e.g.,over-the-counter medications),it is safe to use household measures.In the home,recommend the use of measuring cups or spoons used for cooking.

In Using the System of Household Measurements in Preparing Medications,it