Repeated USMLE Questions Step 1- Review- 49- Pharmacology

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Q- Which one of the following substances increases blood calcium through increasing absorption of calcium from the GI tract and distal tubes of the kidney?

A- Aldosterone

B- Calcitriol

C- Cortisol

D- Retinol

B- Calcitriol- It is the active form of vitamin D (1,25-dihydroxyvitamin D). It works in conjugation with PTH to facilitate absorption of calcium.



Q- Which one of the following symptoms is the most common side effect of diphenhydramine?

A- Anxiety

B- Diarrhea

C- Sedation

D- Urticaria

C- Sedation- This is the common side effect of antihistamines. Loratadine is non-drowsy anti-allergic medicine can be used during the day to avoid sedation.



Q- Which one of the following medications is used in combination with cyclophosphamide to protect against hemorrhagic cystitis?

A- Mensa

B- Ondansetron

C- Riboflavin

D- Vitamin B6

A- Mensa- It is given prophylactically to patients on chemotherapy with cyclophosphamide to avoid its complication, hemorrhagic cystitis.

 

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2 thoughts on “Repeated USMLE Questions Step 1- Review- 49- Pharmacology”

  1. Hi Ella, clicking the answer and explanation button will show the correct answer and explanation. Please let me know if there is any inconvenience.
    Thank you so much

  2. Is there a typo in the above answer? I believe answer choice should be Mesna.

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