Bacterial Cell Wall and Folic Acid Agents Flashcards
Sulfonamide
Sulfa Antibiotic
Characteristics:
- Bacteriostatic
- Structural PABA Analog
MOA:
- Inhibit DHPS preventing Folic Acid Synthesis
AE:
- Acute Renal Failure
- Bone Marrow Depression
- Cyanosis
- Hepatitis
- Hypersensitivity (Stevens-Johnson Syndrome)
Folic Acid Antagonists
Characteristics:
- Bacteriostatic
- Resembles Pteridine Ring of Folate
- Combined with Sulfonamides
MOA:
- Inhibit Dihydrofolate Reductase preventing Folic Acid Synthesis
AE:
- Folate Deficiency
- Megaloblastic Anemia
Penicillin G
Prototype Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Sensitive
- Poor Oral Availability
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
- Proconvulsant Effect if given intrathecally
PK:
- Eliminated via renal tubular secretion
Penicillin V
Prototype Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Sensitive
- Better Oral Availability than Penicillin G
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Methicillin
Narrow Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Resistant
- Poor Oral Availability
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Oxacillin
Narrow Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Resistant
- Good Oral Availability
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Cloxacillin
Narrow Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Resistant
- Good Oral Availability
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Dicloxacillin
Narrow Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Resistant
- Good Oral Availability
- Active against gram-positive bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Ampicillin
Broad Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Sensitive
- Good Oral Availability
- Active against gram-positive/negative bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Amoxicillin
Broad Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Sensitive
- Better Oral Availability than Ampicillin
- Active against gram-positive/negative bacteria
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Carbenicillin
Extended Spectrum Penicillin
Characteristics:
- Bactericidal
- Beta Lactamase Sensitive
- Poor Oral Availability
- Active against gram-positive/negative bacteria
- Active against Pseudomonas aeruginosa, Klebsiella
MOA:
- Inhibit PBPs and prevent development of peptidoglycan layer
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Clavulanic Acid
Beta Lactamase Inhibitors
Characteristics:
- Bactericidal
- Combined with Amoxicillin
MOA:
- Prevent degradation of beta lactam antibiotics by beta lactamase
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Sulbactam
Beta Lactamase Inhibitors
Characteristics:
- Bactericidal
- Combined with Amoxicillin
MOA:
- Prevent degradation of beta lactam antibiotics by beta lactamase
AE:
- Hypersensitivity Reactions
- Anaphylactic Shock
PK:
- Eliminated via renal tubular secretion
Cefradine
1st Generation Cephalosporin
Characteristics:
- Bactericidal
MOA:
- Irreversible inhibition of PBPs
AE:
- Nephrotoxicity (Especially with Cefradine)
- Drug-Induced Alcohol Intolerance
- Bone Marrow Suppression
- Contraindicated in those who experience anaphylaxis in response to penicillin
Cefuroxime
2nd Generation Cephalosporin
Characteristics:
- Bactericidal
- Can cross BBB
MOA:
- Irreversible inhibition of PBPs
AE:
- Nephrotoxicity (Especially with Cefradine)
- Drug-Induced Alcohol Intolerance
- Bone Marrow Suppression
- Contraindicated in those who experience anaphylaxis in response to penicillin
Ceftriaxone
2nd Generation Cephalosporin
Characteristics:
- Bactericidal
- Can cross BBB
MOA:
- Irreversible inhibition of PBPs
AE:
- Nephrotoxicity (Especially with Cefradine)
- Drug-Induced Alcohol Intolerance
- Bone Marrow Suppression
- Contraindicated in those who experience anaphylaxis in response to penicillin
PK:
Majority excreted in renal tubular excretion
- 40-50% eliminated in bile
Cefotaxime
3rd Generation Cephalosporin
Characteristics:
- Bactericidal
- Can cross BBB
MOA:
- Irreversible inhibition of PBPs
AE:
- Nephrotoxicity (Especially with Cefradine)
- Drug-Induced Alcohol Intolerance
- Bone Marrow Suppression
- Contraindicated in those who experience anaphylaxis in response to penicillin
Carbapenem
Carbapenem
Characteristics:
- Bactericidal
- Broad Spectrum Beta Lactam Antibiotic
MOA:
- Structural Difference from
penicillin / cephalosporin
–> Bind differently to PBPs
Maximizes Features of:
- Beta-Lactam Antibiotics
- Beta-Lactamase Inhibitors
AE:
Nephrotoxicity (Seizures with Imipenem)
PK:
Inactivated by Renal Dipeptidases
- Co-prescribed with Cilastatin
Monobactams
Characteristics:
- Bactericidal
- Specific to Gram Negative Microorganisms
MOA:
- Irreversible Inhibitor of PBP3
Glycopeptides & Lipopeptides
Ex.Vancomycin
Characteristics:
- Bactericidal
- Very Unstable
- Given by IV (Given by PO for Clostridium Difficile)
- Last Resort for MRSA (Vancomycin)
MOA:
- Inhibits Bacteria Cell Wall Biosynthesis
- Targets Transglycosylase and Transpeptidase
AE:
- Ototoxicity
- Nephrotoxicity
- Flushing (Redman Syndrome)
- Neutropenia (Low WBC)
Polymyxin Antibiotic
Characteristics:
- Bactericidal
- Specific for Gram Negative Bacilli
MOA:
- Binds to phosphate group of Cytoplasmic Membrane and displacing calcium and disrupting integrity of LPS
AE:
- Nephrotoxicity
Fosfomycin
Characteristics:
- Bactericidal
- Broad Spectrum
MOA:
- Inactivates MurA Enzyme preventing peptidoglycan synthesis