XVI - Antibacterials Flashcards
Bactericidal Antibiotics
Vancomycin, Fluoroquinolones, Penicillins, Aminoglycosides, Metronidazole
Bacteriostatic Antibiotics
Erythromycin, Clindamycin, Sulfamethoxazole, Trimethoprim, Tetracycline, Chloramphenicol
Narrow spectrum penicillin, SE: hypersensitivity
Pen G (IV), Pen V (oral), Benzathine Penicillin (IM)
Penicillinase-resistant penicillin, very narrow therapeutic window, SE: interstitial nephritis
Methicillin, Nafcillin, Oxacillin
Extended spectrum penicillin, SE: pseudomembranous colitis
Ampicillin
Anti-pseudomonal penicillin, SE: hypertension, hypervolemia, bleeding
Ticarcillin
Penicillin for Staphylococcus
Nafcillin
Amoxicillin Coverage
Haemophilus influenzae, Escherichia coli, Listeria monocytogenes, Proteus mirabilis, Salmonella, Enterococci
Penicillin for Pseudomonas
Ticarcillin, Carbenicillin, Piperacillin
1st gen. cephalosporin, high bone penetration, surgical prophylaxis, greatest gram (-) coverage, SE: hypersensitivity
Cefazolin
2nd gen. cephalosporin, added gram (-) coverage, SE: disulfiram reaction
Cefamandole
3rd gen. cephalosporin, pseudomonas, SE: disulfiram reaction
Cefoperazone
Most efficacious cephalosporin for Pseudomonas
Ceftazidime
4th gen. cephalosporin, broad spectrum [gram (+) & (-)]
Cefepime
Cephalosporin with best BBB penetrance
Ceftriaxone
1st Gen. Cephalosporin Coverage
Klebsiella, E. coli, Proteus
1st Gen. Cephalosporins
CeFADroxil, CeFAZolin, CePHalothin, CePHapirin, CePHradine, CePHalexin
2nd Gen. Cephalosporin Coverage
Haemophilus influenzae, Enterobacter aerogenes, Neisseria, Proteus mirabilis, Escherichia coli, Klebsiella pneumoniae, Serratia marcescens
2nd Gen. Cephalosporins
CeFAMandole, CeFOXitin, CeFURoxime, CefoTEtan, CeFAClor, LORAcarbef, CefPROzil, CefometAZOLE, CeFONicid
Drugs that cause disulfiram reaction
Chlorpropamide, CefoPerazone, CefoMandole, CefoMetazole, CefoTetan, Procarbazine, Metronidazole
3rd Gen. Cephalosporins
CeFEtamet, CefPOdoxime, CefoPERAzone, CeFIXime, CefTriaxone, CefTazidime, CefoTaxime, CefTizoxime, CefTibuten
4th Gen. Cephalosporin
Cefepime
Anti-Pseudomonal Cephalosporins
CefTAZidime, CeFEPime, CefoPERAzone
Bind to 30s Subunit
Aminoglycosides, Tetracycline
Bind to 50s Subunit
Chloramphenicol, Erythromycin, Lincosamides, Linezolid
Binds to 50s subunit, SE: aplastic anemia, grey baby syndrome (↓ glucoronyl-transferase)
Chloramphenicol
Binds to 30s subunit, SE: tooth enamel discoloration, photosensitivity
Tetracycline
Binds to 50s subunit, DOC for penicillin-allergic patients
Erythromycin (Macrolide)
Binds to 50s subunit, highest volume of distribution, single dose administration
Azithromycin (Macrolide)
Binds to 50s subunit, anaerobes, SE: pseudomembranous colitis
Clindamycin (Lincosamide)
Binds to 50s subunit, vancomycin-resistant Staph. aureus
Linezolid
For anaerobic infections above the diaphragm
Clindamycin
For anaerobic infections below the diaphragm
Metronidazole
Prototype aminoglycoside, bactericidal, binds to 30s subunit, SE: nephrotoxic, ototoxic
Gentamicin
Aminoglycoside for ocular infections
Tobramycin
Aminoglycoside for PTB
Streptomycin (IM)
Aminoglycoside for drug-resistant gonorrhea
Spectinomycin
Aminoglycoside with the widest spectrum, Pseudomonas, narrow therapeutic window
Amikacin
Aminoglycoside for hepatic encephalopathy
Neomycin
Aminoglycosides require ___ for transport.
oxygen
Aminoglycosides & their SE
Gentamicin, Neomycin, Amikacin, Tobramycin, Streptomycin, Spectinomycin (SE: Nephrotoxic, Ototoxic, Teratogen)
Blocks dihydropteroate synthase, bacteriostatic
Sulfamethoxazole
Blocks dihydrofolate reductase, bacteriostatic
Trimethoprim
Sequential blockade of folate synthesis, UTI, Pneumocystis jirovecii, SE: hypersensitivity (SJS, TEN), kernicterus, hemolysis in G6PD, bactericidal
TMP-SMX
Sulfonamide for burns
Sulfadiazine
Blocks DNA gyrase/topoisomerase II
Fluoroquinolones
2nd gen. quinolone, UTI, GIT infections, SE: tendinitis, contraindicated in children
Ciprofloxacin
3rd gen. quinolone, pulmonary infections
Levofloxacin
4th gen. quinolone, broad spectrum, anaerobes, ocular infections
Moxifloxacin (topical)
4th gen. quinolone, SE: DM
Gatifloxacin
Fluoroquinolones cause _____ hence they should be avoided in pediatric patients.
cartilage damage
Bactericidal, inhibits mycolic acid synthesis, SE: neurotoxic, hepatotoxic, sideroblastic anemia, drug-induced lupus, CYP450 inhibitor
Isoniazid
Bacteriostatic, inhibits DNA-dependent RNA polymerase, SE: red-orange urine, hepatotoxic
Rifampicin
Bacteriostatic, inhibits arabinogalactan synthesis, SE: visual dysfunction (retrobulbar neuritis, color blindness - Ishihara)
Ethambutol
Bacteriostatic but bactericidal on actively dividing MTB, SE: hyperuricemia, most hepatotoxic
Pyrazinamide
Bactericidal, binds to 30s, SE: nephrotoxic, ototoxic
Streptomycin
Hepatotoxic Anti-Mycobacterials
Isoniazid < Rifampicin < Pyrazinamide
Most active drug against M. leprae, inhibits folate synthesis, SE: methemoglobinemia
Dapsone
Inhibits DNA-dependent RNA polymerase, delays onset of dapsone-resistance in leprosy, SE: red-orange urine, hepatotoxic
Rifampicin
Phenazine dye, binds to guanine bases, M. leprae, SE: skin discoloration
Clofazimine
Silver bullet against gram (-) bacteria, no gram (+) activity, Pseudomonas
Aztreonam
Beta-Lactamase Inhibitors
Clavulanic Acid, Tazobactam, Sulbactam
Treatment for MRSA, SE: Red Man syndrome
Vancomycin
Drug of last resort, broad spectrum, SE: CNS toxicity (confusion, encephalopathy, seizures)
Meropenem
Drug usually added to Imipenem to prolong its effects
Cilastatin
Anaerobic and protozoal coverage, treatment pseudomembranous colitis, SE: disulfiram reaction, metallic taste, neurotoxic
Metronidazole
Treatment of UTI, SE: pulmonary fibrosis
Nitrofurantoin
Drugs of Last Resort
Imipinem, Amikacin, Meropenem, Linezolid, Streptogramins, Vancomycin