ATI RN
Pharmacology ATI Final Questions
Question 1 of 5
What does it mean when a medication has a half-life?
Correct Answer: B
Rationale: The correct answer is B. When a medication has a half-life, it refers to the time it takes for half of the dose to be eliminated from the bloodstream. Half-life is an important pharmacokinetic parameter which helps determine the dosing interval and duration of action of a drug. By understanding the half-life of a medication, healthcare providers can make informed decisions regarding dosing schedules to maintain therapeutic levels in the body.
Question 2 of 5
Component of local anesthetic solution which serves as vasoconstrictor:
Correct Answer: B
Rationale: Levonordefrin is a vasoconstrictor that is commonly added to local anesthetic solutions to help reduce bleeding and prolong the anesthetic effect by constricting blood vessels at the injection site. Methylparaben, sodium bisulfite, and sodium pyrosulfite are not vasoconstrictors and do not serve this specific function in local anesthetic solutions.
Question 3 of 5
The withdrawal syndrome is a combination of certain drug-specific symptoms that occur on sudden discontinuation of the drug. This syndrome is associated with:
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
A patient has been receiving intravenous heparin. When laboratory tests are drawn, the nurse has difficulty
Correct Answer: C
Rationale: Protamine sulfate is the specific antidote for heparin, which is used to reverse the effects of heparin in cases of bleeding or elevated PTT/aPTT levels. It works by binding to heparin, neutralizing its anticoagulant activity. Therefore, in this scenario where the patient is experiencing bloody stools, abdominal pain, and has elevated PTT/aPTT levels, the appropriate action for the nurse to take is to obtain an order for protamine sulfate to reverse the effects of heparin. This will help normalize the patient's coagulation profile and manage any bleeding complications associated with heparin therapy.
Question 5 of 5
Nonselective adrenergic blocking agents have a variety of therapeutic uses. Which agent is used for the treatment of heart failure?
Correct Answer: A
Rationale: Carvedilol is available orally and is used to treat hypertension as well as congestive heart failure and left ventricular dysfunction after a myocardial infarction. Sotalol is a nonselective beta-adrenergic blocking agent used to treat potentially life-threatening ventricular arrhythmias and to maintain normal sinus rhythm in patients with atrial fibrillation or flutter. Propranolol is a nonselective beta-adrenergic blocking agent used for treatment of hypertension, angina, idiopathic hypertrophic subaortic stenosis (IHSS) induced palpitations, angina and syncope, some cardiac arrhythmias induced by catecholamines or digoxin, pheochromocytoma; prevention of reinfarction after myocardial infarction; prophylaxis for migraine headache (which may be caused by vasodilation and is relieved by vasoconstriction, although the exact action is not clearly understood); prevention of stage fright (which is a sympathetic stress reaction to a particular situation); and treatment of essential tremors. Tamsulosin is used to treat benign prostatic hyperplasia and is an alpha1-selective adrenergic blocking agent.