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43 Cards in this Set

  • Front
  • Back
What is the mechanism of action of bactericidal drugs? Classes?
Beta lactam drugs bind transpeptidase (aka penicillin binding protein PDP), and interrupt cross-linking of peptidoglycan strands and cell wall is not completed. Classes: Cell wall inhibitors, protein synthesis inhibitors, DNA gyrase inhibitors
Why is staph aureus resistant to penicillin?
It produces a large amount of penicillinase which can hydrolyze most penicillins
What is penicillanase?
is a penicillin specific beta lacatamse, which hydrolyzes the beta lactam structure of penicillin, so it can destroy the penicillin before it inhibits cell wall synthesis
What are the penicillins?
Penicillin G, Penicillin V, Methicillin, Oxacillin, Cloxacillin, Dicloxacillin, Ampicillin, Amoxicillin, Ticaricillin, Pipericillin
Which of the penicillins are resistant to beta lactamase?
Methicillin, Oxacillin, Cloxacillin, Dicloxacillin
Which of the penicillins are both gram positive and negative
Ampicillin, Amoxicillin, Ticaricillin, Pipericillin.
What is the MOA of beta lactamase inhibitors?
Suicide inhibitors. Bind beta-lactamase and spare amoxicillin and ampicillin from hydrolysis when treating penicillinase-producing staphylococci.
What are the beta lactamase inhibitors?
Clavulanic acid, Sulbactum, Tazobactum
What are the generations of the cephalosporins?
1- Cefazolin, Cephalexin. 2-Cefuroxime, Cefoxitin. 3-Ceftriaxone, Ceftazidime. 4-Cefepime
What is the MOA of bacteriostatic drugs? What are the different classes?
Inhibit the growth of the organism, agents that inhibit protein synthesis. Classes: Macrolides, Tetracyclines, 50S drugs
Which drug can be used as an alternate therapy in beta lactam allergy. It has no cross allergenicity with penicillin or cephalosporins
Aztreonam, class= monobactum
What drugs are used to treat UTIs and have a very broad spectrum of activity?
Class= Carbapenem. Drugs= Imipenem, Meropenem, Etrapenem, Doripenem
In what situations are bacteriocidal drugs preferred in?
Infections with poor blood flow (endocarditis), Low WBC, CSF penetration (meningitis). Places where you have trouble getting high concentrations of drugs.
What are the non beta lactam, cell wall synthesis inhibitors?
Vancomycin, Polymyxin B Colistin, and Daptomycin
What is the MOA of Vancomycin and what toxicity do you see when its combined with aminoglycosides?
It binds the D-alanine residue of the pentapeptide and prevents lining with pentaglycine. Get ototoxicity and nephrotoxicity
What is the alternative to vancomycin?
Daptomycin
Which antifolate nucleic acid inhibitors are PABA analohs and inhibit synthesis of Dihydrofolic acid?
Sulfisoxazole and sulfamethoxazole
What antifolate nucleic acid inhibitors are used in combination with sulfanomides and inhibit dihydrofolate reductase?
Trimethoprim and pyrimethamine
Which antifolate nucleic acid inhibitors block purine production and nucleic acid synthesis and are synergistic combination against folate synthesis?
Trimethropim-Sulfamethoxazole
What are the fluroquinolones (nucleic acid inhibitors)?
Ciprofloxacin, Levofloxacin, Moxifloxacin, Gemifloxacin
What are the macrolides? (protein synthesis inhibitors)? And MOA
Erythromycin, Clarithromycin, Azithromycin, Telithromycin. They bind 50s ribosomal subunit
What are the tetracylines?
Tetracyline, Doxycycline, Minocycline, Tigecycline
What drugs that bind 50s, which one is bacteriostatic?
Clindamycin, Linezolid, Chloromphenicol and Quinupristin-Dalfopristin is bacteriocidal
What drug causes gray baby syndrome?
Chloramphenicol
What drugs are in the class aminoglycosides of protein synthesis inhibitors?
Gentamiicin (gram negative), Tobramycin, Amikacin, Streptomycin, Neomycin and Spectinomycin
What do you need to block before treatment with chemotherapy?
Block 5HT3
What you do you need if you're patient is vomiting?
D2 receptor
Ondansetron
5HT3 antagonis, serotonin receptor. Antiemetic w/ Granisetron
Metoclopramide
DA antagonist, antiemetic w/ Prochlorperazine
Diphenhydramine
H1 antagonist, antiemtic w/ Meclizine and Promethazine
Dronabinol
tetrahydrocannabinoids, antiemetic
Aprepitant
NK1 receptor, antiemetic
Azathioprine
Blocks DNA synthesis, for IBD w/ infiximab, prednisone, budesonide, 5-ASA
Metronidazole
antiprotozoal w/ Trimethoprim-sulfamethoxazole and pyrimethamine-sulfadiazine
Chloroquine and Primaquine
antimalarial w/ Mefloquine, quinine
Mebendezole
antihelminth w/ Pyrantel pamoate and Praziquantel
Isoiazid MOA
blocks synthesis of mycolic acid. Anti TB
Ethambutol MOA
inhibits arabinosyl transferase and cell wall synthesis. Anti TB
Rifampin MOA
blocks RNA synthesis. Anti TB
Pyrazinamide MOA
Anti TB
Efavirenz
NNRTI
Zidovudine
NRTI w/ lamivudine, Tenofovir, Emtricitabine
Atazanavir
Protease inhibitors w/ Lopinavir, Ritonavir, Fosamprenavir