🦠microbiology review

Amoxicillin

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Amoxicillin is a broad-spectrum beta-lactam antibiotic that inhibits bacterial cell wall synthesis, leading to cell lysis and death. It is commonly used to treat various bacterial infections of the respiratory and digestive systems.

5 Must Know Facts For Your Next Test

  1. Amoxicillin is effective against both Gram-positive and Gram-negative bacteria.
  2. It belongs to the penicillin class of antibiotics and has a similar mechanism of action as penicillin but with a broader spectrum.
  3. Amoxicillin is often used in combination with clavulanic acid to overcome resistance mediated by beta-lactamase-producing bacteria.
  4. Common side effects include gastrointestinal issues such as nausea, vomiting, and diarrhea.
  5. It is frequently prescribed for conditions like strep throat, pneumonia, urinary tract infections, and dental abscesses.

Review Questions