ATI RN
Pharmacology ATI Quizlet Questions
Question 1 of 5
Which statement is false:
Correct Answer: C
Rationale: Higher potency (lower dose for effect) can coexist with lower efficacy (max effect), true, as potency reflects affinity, not ceiling effect. Higher receptor affinity increases potency, true, per receptor theory. Lower potency doesn't mandate lower efficacy; a less potent drug can achieve the same max effect with more dose, making this false. Higher potency with equal efficacy is true (e.g., partial agonists). This pharmacodynamic distinction is vital for drug selection, where efficacy often trumps potency.
Question 2 of 5
The home health nurse notes that the elderly patient doubled up on his pain medication, even though the prescribed dose was at a therapeutic level. The patient says, 'If one pill is good, two pills are better.' Which statement best describes the result of the patient's action?
Correct Answer: D
Rationale: Doubling a therapeutic dose exceeds the plateau-efficacy maxes out, but side effects (e.g., sedation) rise with excess, especially in the elderly with slower clearance. Tolerance needs chronic use, not one event. More relief assumes linear gain, not true. Tolerance requiring more is future, not immediate. Side effects reflect pharmacodynamics, a key risk.
Question 3 of 5
What is the classification of furosemide?
Correct Answer: A
Rationale: Furosemide belongs to the class of drugs known as loop diuretics. These diuretics act on the thick ascending loop of Henle in the kidney to inhibit sodium and chloride reabsorption, leading to increased urine production and subsequent fluid loss. Loop diuretics are commonly used to treat conditions such as heart failure, hypertension, and edema. Furosemide is a widely prescribed loop diuretic known for its potent diuretic effects.
Question 4 of 5
What is a side effect for Phenytoin?
Correct Answer: D
Rationale: Phenytoin is an antiepileptic medication that is used to control seizures. One of the common side effects of phenytoin is the development of tremors, which are involuntary shaking movements of the body. Patients taking phenytoin may experience tremors as a result of the medication's effects on the central nervous system. It is important for healthcare providers to monitor patients taking phenytoin for the development of tremors and manage them accordingly.
Question 5 of 5
The nurse is reviewing the orders for a patient and notes a new order for an angiotensin-
Correct Answer: D
Rationale: Angiotensin-converting enzyme (ACE) inhibitors, a type of angiotensin inhibitor, may have a serious interaction with nonsteroidal anti-inflammatory drugs (NSAIDs). This interaction can potentially reduce the effectiveness of the ACE inhibitor in lowering blood pressure and may cause kidney damage in susceptible individuals. Therefore, it is crucial for the nurse to be aware of this potential drug interaction and to monitor the patient for any signs of adverse effects when these two drug classes are used together.