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43 Cards in this Set
- Front
- Back
What is the mechanism of action of bactericidal drugs? Classes?
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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
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Why is staph aureus resistant to penicillin?
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It produces a large amount of penicillinase which can hydrolyze most penicillins
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What is penicillanase?
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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
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What are the penicillins?
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Penicillin G, Penicillin V, Methicillin, Oxacillin, Cloxacillin, Dicloxacillin, Ampicillin, Amoxicillin, Ticaricillin, Pipericillin
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Which of the penicillins are resistant to beta lactamase?
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Methicillin, Oxacillin, Cloxacillin, Dicloxacillin
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Which of the penicillins are both gram positive and negative
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Ampicillin, Amoxicillin, Ticaricillin, Pipericillin.
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What is the MOA of beta lactamase inhibitors?
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Suicide inhibitors. Bind beta-lactamase and spare amoxicillin and ampicillin from hydrolysis when treating penicillinase-producing staphylococci.
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What are the beta lactamase inhibitors?
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Clavulanic acid, Sulbactum, Tazobactum
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What are the generations of the cephalosporins?
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1- Cefazolin, Cephalexin. 2-Cefuroxime, Cefoxitin. 3-Ceftriaxone, Ceftazidime. 4-Cefepime
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What is the MOA of bacteriostatic drugs? What are the different classes?
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Inhibit the growth of the organism, agents that inhibit protein synthesis. Classes: Macrolides, Tetracyclines, 50S drugs
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Which drug can be used as an alternate therapy in beta lactam allergy. It has no cross allergenicity with penicillin or cephalosporins
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Aztreonam, class= monobactum
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What drugs are used to treat UTIs and have a very broad spectrum of activity?
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Class= Carbapenem. Drugs= Imipenem, Meropenem, Etrapenem, Doripenem
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In what situations are bacteriocidal drugs preferred in?
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Infections with poor blood flow (endocarditis), Low WBC, CSF penetration (meningitis). Places where you have trouble getting high concentrations of drugs.
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What are the non beta lactam, cell wall synthesis inhibitors?
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Vancomycin, Polymyxin B Colistin, and Daptomycin
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What is the MOA of Vancomycin and what toxicity do you see when its combined with aminoglycosides?
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It binds the D-alanine residue of the pentapeptide and prevents lining with pentaglycine. Get ototoxicity and nephrotoxicity
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What is the alternative to vancomycin?
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Daptomycin
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Which antifolate nucleic acid inhibitors are PABA analohs and inhibit synthesis of Dihydrofolic acid?
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Sulfisoxazole and sulfamethoxazole
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What antifolate nucleic acid inhibitors are used in combination with sulfanomides and inhibit dihydrofolate reductase?
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Trimethoprim and pyrimethamine
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Which antifolate nucleic acid inhibitors block purine production and nucleic acid synthesis and are synergistic combination against folate synthesis?
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Trimethropim-Sulfamethoxazole
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What are the fluroquinolones (nucleic acid inhibitors)?
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Ciprofloxacin, Levofloxacin, Moxifloxacin, Gemifloxacin
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What are the macrolides? (protein synthesis inhibitors)? And MOA
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Erythromycin, Clarithromycin, Azithromycin, Telithromycin. They bind 50s ribosomal subunit
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What are the tetracylines?
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Tetracyline, Doxycycline, Minocycline, Tigecycline
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What drugs that bind 50s, which one is bacteriostatic?
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Clindamycin, Linezolid, Chloromphenicol and Quinupristin-Dalfopristin is bacteriocidal
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What drug causes gray baby syndrome?
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Chloramphenicol
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What drugs are in the class aminoglycosides of protein synthesis inhibitors?
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Gentamiicin (gram negative), Tobramycin, Amikacin, Streptomycin, Neomycin and Spectinomycin
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What do you need to block before treatment with chemotherapy?
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Block 5HT3
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What you do you need if you're patient is vomiting?
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D2 receptor
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Ondansetron
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5HT3 antagonis, serotonin receptor. Antiemetic w/ Granisetron
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Metoclopramide
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DA antagonist, antiemetic w/ Prochlorperazine
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Diphenhydramine
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H1 antagonist, antiemtic w/ Meclizine and Promethazine
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Dronabinol
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tetrahydrocannabinoids, antiemetic
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Aprepitant
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NK1 receptor, antiemetic
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Azathioprine
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Blocks DNA synthesis, for IBD w/ infiximab, prednisone, budesonide, 5-ASA
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Metronidazole
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antiprotozoal w/ Trimethoprim-sulfamethoxazole and pyrimethamine-sulfadiazine
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Chloroquine and Primaquine
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antimalarial w/ Mefloquine, quinine
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Mebendezole
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antihelminth w/ Pyrantel pamoate and Praziquantel
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Isoiazid MOA
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blocks synthesis of mycolic acid. Anti TB
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Ethambutol MOA
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inhibits arabinosyl transferase and cell wall synthesis. Anti TB
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Rifampin MOA
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blocks RNA synthesis. Anti TB
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Pyrazinamide MOA
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Anti TB
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Efavirenz
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NNRTI
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Zidovudine
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NRTI w/ lamivudine, Tenofovir, Emtricitabine
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Atazanavir
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Protease inhibitors w/ Lopinavir, Ritonavir, Fosamprenavir
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