What is an indicator of how long a drug will produce its effect in the body?
1. Potency
2. Bioavailability
3. Half-life (t1/2)
4. Efficacy
Correct Answer: 3
Rationale 1: Potency refers to what dose of drug must be administered to achieve a certain level of response.
Rationale 2: Bioavailability is an index of what fraction of administered drug is absorbed and available to act in the body.
Rationale 3: Half-life is the time it takes the body to remove one-half of the drug from the circulation, and thus is a measure of how long the drug effect will last in the body.
Rationale 4: Efficacy refers to the magnitude of the response to a given dose of drug.
Global Rationale: Half-life is the time it takes the body to remove one-half of the drug from the circulation, and thus is a measure of how long the drug effect will last in the body. Potency refers to what dose of drug must be administered to achieve a certain level of response. Bioavailability is an index of what fraction of administered drug is absorbed and available to act in the body. Efficacy refers to the magnitude of the response to a given dose of drug.
You might also like to view...
A patient being mechanically ventilated has the following ventilator settings: SIMV 16, PEEP 20 cm of H2O, FiO2 45%, tidal volume .450 liters. What concern should the nurse have for this patient?
1. barotrauma 2. volutrauma 3. sinusitis 4. oxygen toxicity
A nursing instructor asks the students to identify the benefits of healthy physical activity/exercise. Which response by a student would indicate that further teaching is necessary?
a. improve lung function b. boost the immune system c. improves flexibility and endurance d. may improve mental outlook
An older adult asks the nurse about the appearance of flat brown age spots on the hands
After examining the client's hands, the nurse recognizes these skin characteristics as a common skin variation in the older adult and documents the variations as which of the following? A) Senile lentigines B) Lanugo C) Senile keratosis D) Cherry angiomas
A computed tomographic (CT) scan is a type of:
A. X-ray procedure. B. ultrasound procedure. C. radioisotope procedure. D. procedure that measures the electrical activity of body tissues.