The nurse has given 800mg of a medication that has an 8-hour half-life. How much of the medication will remain in the client's body 24 hours after administration if no additional medication is given?
50 mg
200 mg
100 mg
400 mg
The Correct Answer is C
A half-life is the time it takes for the concentration of a drug in the body to decrease by half. In this case, the medication has an 8-hour half-life, so after 8 hours, the concentration of the medication in the client's body would be reduced to 400mg (half of the initial dose of 800mg). After another 8 hours (16 hours total), the concentration would be reduced to 200mg. After another 8 hours (24 hours total), the concentration would be reduced to 100mg.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
In pharmacodynamics, receptors play a crucial role in mediating the effects of medications ¹. Medications must bind with receptors to mimic or block the actions of the body's own regulatory molecules ¹. This binding can activate or inhibit the receptor, leading to a biological response ¹.
Option B is incorrect because activation of the receptor by the medication does not necessarily cause the cell to develop a new function.
Option C is incorrect because receptors do not start the process of metabolism of the medication by the liver.
Option D is incorrect because binding a medication to a receptor does not necessarily make the medication more selective to that type of receptor.
Correct Answer is C
Explanation
Dantrolene is a medication that can be used to manage symptoms of malignant hyperthermia ¹. Malignant hyperthermia is a life-threatening reaction to certain medications used during general anesthesia ².
Dantrolene works by inhibiting the release of calcium in the muscles, which helps control the condition and restore normal vital signs ³.
Option A is not correct because baclofen is not used to manage symptoms of malignant hyperthermia.
Option B is not correct because diazepam is not used to manage symptoms of malignant hyperthermia.
Option D is not correct because tizanidine is not used to manage symptoms of malignant hyperthermia.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today