lOMoAR cPSD| 66549320
NR566 Final Exam Professor Questions:
1. How can certain fruit juices, like orange juice, reduce the absorption of
fexofenadine?
Answer:
Certain fruit juices (like orange, apple, or grapefruit juice) can reduce the absorption of
fexofenadine by inhibiting intestinal transport proteins that are required for its uptake.
Rationale:
Fexofenadine relies on organic anion transporting polypeptides (OATPs) in the gut for
absorption. Fruit juices contain compounds that inhibit these transporters, resulting in
significantly decreased drug absorption and lower blood levels
2. How would you advise a patient on the timing of fexofenadine dosing in relation
to consuming fruit juices?
Answer:
Advise the patient to avoid fruit juices for at least 4 hours before and 1–2 hours after
taking fexofenadine.
Rationale:
Taking fexofenadine with water rather than fruit juice minimizes interaction and ensures
optimal absorption
3. How does grapefruit juice inhibit the absorption of fexofenadine? Answer:
Grapefruit juice inhibits the OATP-mediated uptake of fexofenadine from the GI tract,
decreasing its absorption.
Rationale:
Unlike some drugs where grapefruit juice increases blood levels by inhibiting CYP3A4,
with fexofenadine the effect is the opposite: OATP inhibition blocks the drug’s entry into
the bloodstream, leading to subtherapeutic effects
4. How would you advise a patient on the timing of fexofenadine dosing in relation
to consuming grapefruit juice?
Answer:
Instruct the patient not to drink grapefruit juice for at least 4 hours before and 1–2
hours after taking fexofenadine.
Rationale:
This advice is the same as for other fruit juices—space out consumption to avoid
decreased absorption
https://www.stuvia.com/user/performance
, lOMoAR cPSD| 66549320
5. How do glucocorticoids alter the activity of target genes through their action in
the cell nucleus?
Answer:
Glucocorticoids bind to intracellular receptors, then the drug-receptor complex moves
to the nucleus, where it regulates gene transcription— turning on anti-inflammatory
genes and turning off pro-inflammatory genes. Rationale:
This genomic mechanism is fundamental to their effects, allowing for widespread
changes in protein synthesis that control inflammation and immune response
6. How would you explain the mechanism of action of glucocorticoids to a patient
starting therapy?
Answer:
Glucocorticoids work by entering your cells, where they help reduce inflammation by
turning off the genes that cause swelling and turning on the genes that help decrease it.
Rationale:
These medications bind to receptors inside the cell, then move to the cell’s nucleus and
change which proteins are made, suppressing inflammation at its source
7. How do glucocorticoids produce anti-inflammatory and immunosuppressive
effects?
Answer:
They decrease the production of inflammatory chemicals and suppress immune cell
activity.
Rationale:
Glucocorticoids reduce the release of pro-inflammatory mediators (like cytokines and
prostaglandins) and decrease white blood cell migration and function, which together
lower both inflammation and immune responses
8. How would you counsel a patient on the benefits and risks of glucocorticoid
therapy for inflammation?
Answer:
Benefits: Quick and strong relief of inflammation, pain, and swelling. Risks: Possible
side effects with long-term use—weight gain, high blood sugar, mood changes, risk for
infections, and bone thinning (osteoporosis).
Rationale:
Glucocorticoids are highly effective but carry risks, especially when used long-term or at
high doses. Patient counseling should always address both sides
https://www.stuvia.com/user/performance
, lOMoAR cPSD| 66549320
9. Why does glucocorticoid therapy induce osteoporosis, and what are the
mechanisms involved?
Answer:
Glucocorticoids induce osteoporosis by decreasing bone formation, increasing bone
resorption, reducing calcium absorption, and increasing urinary calcium loss.
Rationale:
They suppress osteoblast (bone-building) activity, enhance osteoclast (bone breakdown)
activity, decrease GI calcium absorption, and increase renal calcium excretion—together
this weakens bones over time
10. How would you manage a patient on long-term glucocorticoid therapy to
minimize the risk of osteoporosis?
Answer:
Recommend adequate calcium and vitamin D, encourage weightbearing exercise,
minimize the steroid dose/duration, and consider bone-protective medications if
needed.
Rationale:
Prevention is key: lifestyle and dietary measures should start early, and bone density
monitoring is often indicated for those on chronic glucocorticoid therapy
11. Why are glucocorticoids not effective as sole therapy for severe allergic reactions
like anaphylaxis?
Answer:
Glucocorticoids act too slowly to treat the immediate, life-threatening symptoms of
anaphylaxis.
Rationale:
The onset of action for glucocorticoids is hours, whereas anaphylaxis requires rapid reversal
of airway, cardiovascular, and shock symptoms
—immediate-acting drugs like epinephrine are needed
12. How would you manage a patient experiencing anaphylaxis in terms of
medication administration?
Answer:
Administer intramuscular epinephrine immediately, provide oxygen, start IV fluids if
needed, and consider adjunctive antihistamines and corticosteroids.
Rationale:
Epinephrine is the first-line, life-saving therapy for anaphylaxis. Antihistamines and
steroids may help prevent recurrence but are not substitutes for epinephrine
https://www.stuvia.com/user/performance
NR566 Final Exam Professor Questions:
1. How can certain fruit juices, like orange juice, reduce the absorption of
fexofenadine?
Answer:
Certain fruit juices (like orange, apple, or grapefruit juice) can reduce the absorption of
fexofenadine by inhibiting intestinal transport proteins that are required for its uptake.
Rationale:
Fexofenadine relies on organic anion transporting polypeptides (OATPs) in the gut for
absorption. Fruit juices contain compounds that inhibit these transporters, resulting in
significantly decreased drug absorption and lower blood levels
2. How would you advise a patient on the timing of fexofenadine dosing in relation
to consuming fruit juices?
Answer:
Advise the patient to avoid fruit juices for at least 4 hours before and 1–2 hours after
taking fexofenadine.
Rationale:
Taking fexofenadine with water rather than fruit juice minimizes interaction and ensures
optimal absorption
3. How does grapefruit juice inhibit the absorption of fexofenadine? Answer:
Grapefruit juice inhibits the OATP-mediated uptake of fexofenadine from the GI tract,
decreasing its absorption.
Rationale:
Unlike some drugs where grapefruit juice increases blood levels by inhibiting CYP3A4,
with fexofenadine the effect is the opposite: OATP inhibition blocks the drug’s entry into
the bloodstream, leading to subtherapeutic effects
4. How would you advise a patient on the timing of fexofenadine dosing in relation
to consuming grapefruit juice?
Answer:
Instruct the patient not to drink grapefruit juice for at least 4 hours before and 1–2
hours after taking fexofenadine.
Rationale:
This advice is the same as for other fruit juices—space out consumption to avoid
decreased absorption
https://www.stuvia.com/user/performance
, lOMoAR cPSD| 66549320
5. How do glucocorticoids alter the activity of target genes through their action in
the cell nucleus?
Answer:
Glucocorticoids bind to intracellular receptors, then the drug-receptor complex moves
to the nucleus, where it regulates gene transcription— turning on anti-inflammatory
genes and turning off pro-inflammatory genes. Rationale:
This genomic mechanism is fundamental to their effects, allowing for widespread
changes in protein synthesis that control inflammation and immune response
6. How would you explain the mechanism of action of glucocorticoids to a patient
starting therapy?
Answer:
Glucocorticoids work by entering your cells, where they help reduce inflammation by
turning off the genes that cause swelling and turning on the genes that help decrease it.
Rationale:
These medications bind to receptors inside the cell, then move to the cell’s nucleus and
change which proteins are made, suppressing inflammation at its source
7. How do glucocorticoids produce anti-inflammatory and immunosuppressive
effects?
Answer:
They decrease the production of inflammatory chemicals and suppress immune cell
activity.
Rationale:
Glucocorticoids reduce the release of pro-inflammatory mediators (like cytokines and
prostaglandins) and decrease white blood cell migration and function, which together
lower both inflammation and immune responses
8. How would you counsel a patient on the benefits and risks of glucocorticoid
therapy for inflammation?
Answer:
Benefits: Quick and strong relief of inflammation, pain, and swelling. Risks: Possible
side effects with long-term use—weight gain, high blood sugar, mood changes, risk for
infections, and bone thinning (osteoporosis).
Rationale:
Glucocorticoids are highly effective but carry risks, especially when used long-term or at
high doses. Patient counseling should always address both sides
https://www.stuvia.com/user/performance
, lOMoAR cPSD| 66549320
9. Why does glucocorticoid therapy induce osteoporosis, and what are the
mechanisms involved?
Answer:
Glucocorticoids induce osteoporosis by decreasing bone formation, increasing bone
resorption, reducing calcium absorption, and increasing urinary calcium loss.
Rationale:
They suppress osteoblast (bone-building) activity, enhance osteoclast (bone breakdown)
activity, decrease GI calcium absorption, and increase renal calcium excretion—together
this weakens bones over time
10. How would you manage a patient on long-term glucocorticoid therapy to
minimize the risk of osteoporosis?
Answer:
Recommend adequate calcium and vitamin D, encourage weightbearing exercise,
minimize the steroid dose/duration, and consider bone-protective medications if
needed.
Rationale:
Prevention is key: lifestyle and dietary measures should start early, and bone density
monitoring is often indicated for those on chronic glucocorticoid therapy
11. Why are glucocorticoids not effective as sole therapy for severe allergic reactions
like anaphylaxis?
Answer:
Glucocorticoids act too slowly to treat the immediate, life-threatening symptoms of
anaphylaxis.
Rationale:
The onset of action for glucocorticoids is hours, whereas anaphylaxis requires rapid reversal
of airway, cardiovascular, and shock symptoms
—immediate-acting drugs like epinephrine are needed
12. How would you manage a patient experiencing anaphylaxis in terms of
medication administration?
Answer:
Administer intramuscular epinephrine immediately, provide oxygen, start IV fluids if
needed, and consider adjunctive antihistamines and corticosteroids.
Rationale:
Epinephrine is the first-line, life-saving therapy for anaphylaxis. Antihistamines and
steroids may help prevent recurrence but are not substitutes for epinephrine
https://www.stuvia.com/user/performance
