When identifying an example of a unit dose, it is important to understand that a unit dose is a specific quantity of a drug to be taken at one time. The key here is that it usually represents a precise measurement of medication.
Consider the options provided:
1. [tex]$4 / 18: This appears to be a numerical fraction and does not relate to a medication dosage. It does not specify any amount of a drug or its form (such as mg or mL).
2. NDC 2088: This looks like a National Drug Code (NDC), which is used to uniquely identify medication products. While important for identification purposes, it does not provide a dosage or quantity of a drug administration.
3. 250 tablets: This specifies a quantity of medication (250 tablets), but it does not indicate the dose a patient should take at one time. It merely tells us how many tablets are in a container.
4. $[/tex]25 mg / 2 mL[tex]$: This clearly specifies a precise quantity of a drug - $[/tex]25 mg of the drug suspended in 2 mL of liquid. This fits the definition of a unit dose, as it tells how much of the medication (25 mg) is contained in a specific volume (2 mL).
Based on the definitions and provided options, the example that best fits a unit dose is:
$25 mg / 2 mL
This clearly indicates the amount of active ingredient (25 mg) within a specific volume of solution (2 mL), fitting the criteria for a unit dose.
