NR565 Exam: NR 565 Advanced Pharmacology Fundamentals Complete Question 100 Test
Preparation Exam Questions and Answers
,Correct Answer: B. Absence of endogenous insulin
Clinical Rationale
Pioglitazone belongs to the thiazolidinedione (TZD) class of medications. Its effectiveness is
dependent on the following factors:
Mechanism of Action: Pioglitazone works by increasing the sensitivity of peripheral tissues
(like muscle and adipose tissue) to insulin.
Insulin Dependency: Because it is an insulin sensitizer, there must be a baseline level of
insulin present in the body for the drug to have any physiological effect.
Type 1 Diabetes Pathophysiology: In Type 1 diabetes, there is an absolute deficiency of insulin
due to the autoimmune destruction of pancreatic beta cells.
Incompatibility: Since there is an absence of endogenous insulin in Type 1 patients, a drug
that purely enhances insulin sensitivity (like pioglitazone) has no "target" to work with, making
it ineffective for this population.
,Correct Answer: A. Butterbur
Rationale and Clinical Application
Evidence Rating: Butterbur (Petasites hybridus) is the only botanical listed that was historically
granted a Level A rating (established as effective) by the American Academy of Neurology
(AAN) and the American Headache Society (AHS) for migraine prevention.
Mechanism of Action: It is believed to have antispasmodic and anti-inflammatory effects,
specifically by inhibiting leukotriene synthesis.
Clinical Note: While it holds this high evidence rating, clinicians often exercise caution or have
moved away from recommending it due to safety concerns regarding pyrrolizidine alkaloids
(PAs), which can be hepatotoxic (liver-damaging) if the extract is not properly processed.
, Correct Answer: C. Infliximab
Rationale: For a patient with severe symptoms of ulcerative colitis that have not responded to
initial treatment with glucocorticoids (refractory disease), a second-line agent like Infliximab (a
TNF-alpha inhibitor) is appropriate for inducing and maintaining remission.
Why others are incorrect:
o Metoclopramide: Used for gastroparesis and nausea, not for treating the inflammatory
process of colitis.
o Sulfasalazine: Typically considered a first-line agent for mild-to-moderate disease, but
usually insufficient as a standalone escalation for severe, steroid-refractory cases.
o Nitroglycerin ointment: Used for anal fissures, not the systemic management of
ulcerative colitis.
Preparation Exam Questions and Answers
,Correct Answer: B. Absence of endogenous insulin
Clinical Rationale
Pioglitazone belongs to the thiazolidinedione (TZD) class of medications. Its effectiveness is
dependent on the following factors:
Mechanism of Action: Pioglitazone works by increasing the sensitivity of peripheral tissues
(like muscle and adipose tissue) to insulin.
Insulin Dependency: Because it is an insulin sensitizer, there must be a baseline level of
insulin present in the body for the drug to have any physiological effect.
Type 1 Diabetes Pathophysiology: In Type 1 diabetes, there is an absolute deficiency of insulin
due to the autoimmune destruction of pancreatic beta cells.
Incompatibility: Since there is an absence of endogenous insulin in Type 1 patients, a drug
that purely enhances insulin sensitivity (like pioglitazone) has no "target" to work with, making
it ineffective for this population.
,Correct Answer: A. Butterbur
Rationale and Clinical Application
Evidence Rating: Butterbur (Petasites hybridus) is the only botanical listed that was historically
granted a Level A rating (established as effective) by the American Academy of Neurology
(AAN) and the American Headache Society (AHS) for migraine prevention.
Mechanism of Action: It is believed to have antispasmodic and anti-inflammatory effects,
specifically by inhibiting leukotriene synthesis.
Clinical Note: While it holds this high evidence rating, clinicians often exercise caution or have
moved away from recommending it due to safety concerns regarding pyrrolizidine alkaloids
(PAs), which can be hepatotoxic (liver-damaging) if the extract is not properly processed.
, Correct Answer: C. Infliximab
Rationale: For a patient with severe symptoms of ulcerative colitis that have not responded to
initial treatment with glucocorticoids (refractory disease), a second-line agent like Infliximab (a
TNF-alpha inhibitor) is appropriate for inducing and maintaining remission.
Why others are incorrect:
o Metoclopramide: Used for gastroparesis and nausea, not for treating the inflammatory
process of colitis.
o Sulfasalazine: Typically considered a first-line agent for mild-to-moderate disease, but
usually insufficient as a standalone escalation for severe, steroid-refractory cases.
o Nitroglycerin ointment: Used for anal fissures, not the systemic management of
ulcerative colitis.
