Beta Blockers USMLE Step 1 Practice Question
A 46-year-old woman with rheumatoid arthritis takes methotrexate for disease control. Following an accidental overdose, she presents with severe oral ulcers, pancytopenia (WBC 2.1 K/µL), and bone marrow suppression. Vital signs show HR 102 bpm, BP 118/76 mmHg, RR 18, temperature 37.2°C. She denies recent infections. Rescue therapy is initiated with a reduced folate analog that bypasses dihydrofolate reductase inhibition. Which agent was most likely administered?
Answer choices
- AProtamine sulfate
- BCyanocobalamin
- CMesna
- DPyridoxine
- EFolinic acid leucovorinCorrect answer
- FFolic acid
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