First Aid USMLE

Liberty University

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USMLE FULL SOLUTION PACK STEP 1 AND STEP 2 Bundled exams with complete solution.

USMLE FULL SOLUTION PACK STEP 1 AND STEP 2 Bundled exams with complete solution.
Package deal • 11 items • 2023

A 73-year-old man comes to the office with fatigue that has become progressively worse over the last several months. He is also short of breath when he walks up one flight of stairs. He drinks 4 vodka martinis a day. He complains of numbness and tingling in his feet. On physical examination he has decreased sensation of his feet. His hematocrit is

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First Aid USMLE Step 1: Pharmacology (Complete)

First Aid USMLE Step 1: Pharmacology (Complete)
Exam (elaborations) • 138 pages • 2023
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Penicillin G (IV and IM) Penicillin M (oral) Correct Answer: *MOA:* *β-lactam*: a structural analog of D-ala-D-ala (a normal component of cell walls) which binds and inactivates bacterial transpeptidases (penicillin-binding protein, PBPs) to block peptidoglycan cross linking *Clinical use:* Bactericidal for Gram-⊕ cocci/rods, Gram-⊖ cocci (Neisseria), and spirochetes Mostly used for Gram-⊕ organisms (S. pneumoniae, S. pyogenes, Actinomyces). Also used for Gram-⊖ cocci (mainly...