NR 293
Pharmacology Intracranial Regulation
& Neurological Disorders
Comprehensive Study Guide
UPDATE
Actual Questions & Verified Answers
with Detailed Clinical Rationales
Practice Questions with Rationales
Chamberlain University
NR 293
✓ 100% Verified Answers
✓ Complete Rationales Included
Exam (elaborations)
Instant PDF Download • Ready for Study
,NR 293 Pharmacology: Intracranial Regulation & Neurological Disorders 2026/2027 UPDATE
1. Which mechanism best describes how Phenytoin (Dilantin) exerts its anti-epileptic effects?
A. Potentiating GABAergic transmission
B. Antagonism of NMDA glutamate receptors
C. Selective inhibition of voltage-gated sodium channels
D. Inhibition of T-type calcium channels
Answer: C
Rationale: Phenytoin works by slowing the recovery of voltage-gated sodium channels
from the inactive state to the active state, thereby suppressing the high-frequency firing of
neurons.
2. A patient with Parkinson’s disease is prescribed Levodopa-Carbidopa. What is the primary
purpose of combining Carbidopa with Levodopa?
A. To inhibit peripheral decarboxylation of Levodopa
B. To act as a dopamine agonist in the synaptic cleft
C. To increase the permeability of the blood-brain barrier to dopamine
D. To prevent the breakdown of dopamine by MAO-B
Answer: A
, Rationale: Carbidopa inhibits the enzyme DOPA decarboxylase in the periphery,
preventing Levodopa from being converted to dopamine before it reaches the brain, which
reduces systemic side effects and increases central availability.
3. Which osmotic diuretic is the gold standard for reducing increased intracranial pressure
(ICP) in a patient with a traumatic brain injury?
A. Mannitol
B. Spironolactone
C. Furosemide
D. Acetazolamide
Answer: A
Rationale: Mannitol is an osmotic diuretic that creates an osmotic gradient, drawing water
out of the brain parenchyma into the intravascular space, thereby reducing ICP.
4. A patient is experiencing Status Epilepticus. Which medication is considered the first-line
choice for rapid termination of seizure activity?
A. IV Phenytoin
B. IV Lorazepam
C. Oral Valproic Acid
D. IV Phenobarbital
Answer: B
Pharmacology Intracranial Regulation
& Neurological Disorders
Comprehensive Study Guide
UPDATE
Actual Questions & Verified Answers
with Detailed Clinical Rationales
Practice Questions with Rationales
Chamberlain University
NR 293
✓ 100% Verified Answers
✓ Complete Rationales Included
Exam (elaborations)
Instant PDF Download • Ready for Study
,NR 293 Pharmacology: Intracranial Regulation & Neurological Disorders 2026/2027 UPDATE
1. Which mechanism best describes how Phenytoin (Dilantin) exerts its anti-epileptic effects?
A. Potentiating GABAergic transmission
B. Antagonism of NMDA glutamate receptors
C. Selective inhibition of voltage-gated sodium channels
D. Inhibition of T-type calcium channels
Answer: C
Rationale: Phenytoin works by slowing the recovery of voltage-gated sodium channels
from the inactive state to the active state, thereby suppressing the high-frequency firing of
neurons.
2. A patient with Parkinson’s disease is prescribed Levodopa-Carbidopa. What is the primary
purpose of combining Carbidopa with Levodopa?
A. To inhibit peripheral decarboxylation of Levodopa
B. To act as a dopamine agonist in the synaptic cleft
C. To increase the permeability of the blood-brain barrier to dopamine
D. To prevent the breakdown of dopamine by MAO-B
Answer: A
, Rationale: Carbidopa inhibits the enzyme DOPA decarboxylase in the periphery,
preventing Levodopa from being converted to dopamine before it reaches the brain, which
reduces systemic side effects and increases central availability.
3. Which osmotic diuretic is the gold standard for reducing increased intracranial pressure
(ICP) in a patient with a traumatic brain injury?
A. Mannitol
B. Spironolactone
C. Furosemide
D. Acetazolamide
Answer: A
Rationale: Mannitol is an osmotic diuretic that creates an osmotic gradient, drawing water
out of the brain parenchyma into the intravascular space, thereby reducing ICP.
4. A patient is experiencing Status Epilepticus. Which medication is considered the first-line
choice for rapid termination of seizure activity?
A. IV Phenytoin
B. IV Lorazepam
C. Oral Valproic Acid
D. IV Phenobarbital
Answer: B
