A nurse is preparing to administer a medication to a patient. Which of the following routes of administration would result in the fastest rate of absorption?
Oral tablet
Intramuscular injection
Intravenous injection
Subcutaneous injection
The Correct Answer is C
A. Oral tablet: Oral medications must pass through the gastrointestinal tract and undergo first-pass metabolism in the liver before entering systemic circulation, significantly delaying the onset of action compared to parenteral routes.
B. Intramuscular injection: IM injections are absorbed faster than oral or subcutaneous routes due to the rich blood supply in muscle tissue. The rate of absorption depends on factors such as blood flow to the muscle, the solubility of the drug, and the injection site. While faster than oral administration, it is still slower than IV.
C. Intravenous injection: IV administration delivers the drug directly into the bloodstream, resulting in immediate systemic availability and the fastest onset of action. This route bypasses absorption barriers entirely.
D. Subcutaneous injection: SC injections are absorbed more slowly than IM and IV routes because of the lower vascularity of subcutaneous tissue. Onset of action is delayed relative to other parenteral methods.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. "I'll use a spacer device when I inhale this medication.": Montelukast is not an inhaled medication; it is taken orally in tablet or chewable form. Spacer devices are used with inhalers to improve drug delivery to the lungs, which is not applicable to Montelukast.
B. "I'll rinse my mouth after taking this medication.": Rinsing the mouth is advised after using inhaled corticosteroids to reduce the risk of oral candidiasis. Since Montelukast is taken by mouth and is not associated with this risk, rinsing is unnecessary.
C. "I'll take this medication when I get an asthma attack.": Montelukast is not a rescue medication. It is a leukotriene receptor antagonist used for long-term control and prevention of asthma symptoms. It has no role in managing acute bronchospasm.
D. "I'll take this medication once a day in the evening.": Montelukast is typically taken once daily in the evening, especially in patients with nocturnal asthma or exercise-induced symptoms. Evening dosing enhances its effectiveness in controlling nighttime symptoms and reducing airway inflammation.
Correct Answer is ["12.5"]
Explanation
Desired dose = 25 mg
Available concentration = 10 mg per 5 mL
- Calculate the concentration in mg/mL:
Concentration (mg/mL) = Available dose / Available volume
= 10 mg / 5 mL
= 2 mg/mL
Volume to administer = Desired dose / Available concentration
= 25 mg / 2 mg/mL
= 12.5 mL
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