Vancomycin vs Linezolid and daptomycin
How to tell Vancomycin and Linezolid and daptomycin apart when a board question makes them look alike.
Vancomycin is wall plus infusion/renal; linezolid is 50S plus marrow/serotonin; daptomycin is membrane plus CK/no pneumonia.
Side by side
Gram-positive cell-wall drug with infusion flushing/pruritus and nephrotoxicity monitoring.
Resistant gram-positive alternatives: linezolid causes myelosuppression/serotonin risk; daptomycin causes myopathy and is not for pneumonia.
Vancomycin binds D-Ala-D-Ala and inhibits peptidoglycan polymerization.
Linezolid blocks 50S initiation complex formation; daptomycin depolarizes gram-positive cell membranes.
Infusion reaction, trough/AUC monitoring, or C difficile oral therapy clue supports vancomycin.
Falling platelets or serotonergic interaction points linezolid; elevated CK or surfactant inactivation points daptomycin.
The trap
All three can be anti-resistant gram-positive options, so the toxicity clue is often the real answer.
The repair move
For resistant gram-positive drugs, pair each drug with one forbidden/monitored toxicity before choosing.
Try a free question
CoreA patient with severe gram-positive infection receives vancomycin. During infusion, flushing and pruritus develop, so the team slows the infusion. Which drug best fits?
Show answer and explanation
Answer: A. Vancomycin. Vancomycin blocks peptidoglycan polymerization and is remembered for infusion-related flushing plus nephrotoxicity monitoring.
Why the other choices are tempting
- B. Linezolid blocks 50S initiation and is remembered for myelosuppression and serotonin syndrome risk.
- C. Daptomycin depolarizes gram-positive membranes and is remembered for myopathy and no pneumonia use.
- D. Cefepime is a fourth-generation cephalosporin.
- E. Azithromycin is a macrolide.
Flashcards
Tap a card to flip it.
What is the fastest separator for Vancomycin vs Linezolid and daptomycin?
Vancomycin is wall plus infusion/renal; linezolid is 50S plus marrow/serotonin; daptomycin is membrane plus CK/no pneumonia.
What clue should make you choose Vancomycin?
Gram-positive cell-wall drug with infusion flushing/pruritus and nephrotoxicity monitoring.
Quick answers
What is the fastest way to tell Vancomycin from Linezolid and daptomycin?
Vancomycin is wall plus infusion/renal; linezolid is 50S plus marrow/serotonin; daptomycin is membrane plus CK/no pneumonia.
What is the key clue for Vancomycin?
Gram-positive cell-wall drug with infusion flushing/pruritus and nephrotoxicity monitoring.
What is the key clue for Linezolid and daptomycin?
Resistant gram-positive alternatives: linezolid causes myelosuppression/serotonin risk; daptomycin causes myopathy and is not for pneumonia.
What is the common trap with Vancomycin vs Linezolid and daptomycin?
All three can be anti-resistant gram-positive options, so the toxicity clue is often the real answer.