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DCPA Antibiotics

        Help!  

Question
Answer
Colonization   Presence of microbe in a host does not cause a specific immune reaction or infection (Do NOT Tx w/ Abx)  
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Empiric Therapy   Abx choice based on clinically most likely pathogen  
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Definitive Therapy   Abx choise based on identified pathogen & susceptibilty patterns  
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De-escalation   Adjustment of Abx regimen from broad to narrow spectrum  
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Collateral Damage   Unwanted negative effect of an Abx on NMF  
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Minimum Inhibitory Concentration (MIC)   Minimum [] that inhibits groth of organism  
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Antibiogram   Compilation of data for bacteria vs. abx  
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Gram (+) Cocci bacteria   S. Aureus, Staph Epidermidis, Strept Pyogenes, Strep Agalactiae, S. pneumoniae, enterococci, Strp bovis, Viridans Strep, Strep intermedius  
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S. Epidermidis infections   Associated with "hardware"  
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Enterococci infections   UTI, appendicitis  
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Strep Bovis Infections   Bowel lesion = spread of infection  
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Strep. Intermedius Infections   Abcess Formers  
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Gram (+) Bacilli Bacteria   **Usually erroneous Sample** Corneybacterium Diptheriae, Listeria Monocytogenes, Bacillus Antracis, Erysipelothrix Rhusiopathiae  
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Listeria Monocytogenes Infections   Meningitis (Can't eat cheese in 2nd/3rd trimester)  
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Gram (-) Cocci Bacteria   Neisseria Meningitidis, Neisseria Gonorrhoeae, Moraxella (Branhamella) Catarrhalis  
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Gram (-) Bacilli Bacteria   Vibrio cholerae, Campylobacter jejuni, H. Pylori, Pseudomonas Aeruginosa, Salmonella, H. Influenza, Brucella, Francisella Tularensis (Tularemia), Pasturella Multocida, Legionella Pneumophilia, Bartonella, Shigella, Enterobacter (E. Coli, etc.)  
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Pasturella Multocida Caused by...   Bites (Mouths) or Cats & dogs  
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Bartonella caused by...   Cat scratch  
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Anaerobes   Clostridium tetani, C. botulinum, C. Difficile, C. Perfringens, Bacteroides, Fusobacterium, Peptostreptococcus, Prevotella  
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Clostridium Perfringens Infection   Gas Gangrene  
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Beta-Lactum Drugs   Penicillin, Cephalosporin, Carbapenems, Aztreonam  
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Beta-Lactums MOA   Interferes with cell wall synthesis  
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Glycoprotein MOA   Interferes with cell wall synthesis  
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Fluoroquinolones MOA   Interferes with DNA replication, transcription  
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Rifampin MOA   Interferes with DNA replication, transcription  
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Aminoglycosides MOA   Binds to 30s/50s Ribosomal Subunit  
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Macrolides MOA   Binds to 30s/50s Ribosomal Subunit  
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Ketolides MOA   Binds to 30s/50s Ribosomal Subunit  
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Oxazolidinones MOA   Binds to 30s/50s Ribosomal Subunit  
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Tetracyclines MOA   Binds to 30s/50s Ribosomal Subunit  
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Streptogramins MOA   Binds to 30s/50s Ribosomal Subunit  
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Broad Spectrum Drugs   PCN (Penicillin), 3rd/4th generation Cephalosporins, Carbapenems  
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Narrow Spectrum Gram(+) Drugs   Vancomycin  
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Narrow Spectrum Gram(-) Drugs   Aminoglycosides, Aztreonam  
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Narrow Spectrum Anaerobes Drugs   Metronidazole (Flagyl)  
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Pharmacokinetics   Absorption (Bioavailability), Distribution, Metabolism, Elimination  
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Pharmodynamics   Relationship between drug concentration & effect "Antibiotic Potency"  
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Bioavailability   % of oral dose available compared to IV form (100%)  
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Clearance   Determines steady state of drug (determined by blood flow to metabolizing organ & rate of extraction of the drug from blood)  
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Volume of Distribution   Relates the amount of drug in the body to the serum drug concentration (Dependent on BMI)  
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Steady State   After 3 half lives  
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Postantibiotic Effect (PAE)   Delay before organisms recover & begin growing despite decrease concentration of drug  
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Four Primary Machanisms of Resistance.   Alterations in outer membrane permeability. Alteration in drug binding sites, Production of molecules capable of inactivating drug molecules. Active efflux of antibiotic from the bacteria.  
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Abx. dosing & duration   DONT under dose/increase duration = resistance  
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Bacterocidal Drugs   Beta Lactams, Cephalosporins, quinolones, aminoglycosides  
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Bacterostatic Drugs   Clindamycin, macrolides, sulfonamides, Tetracycline  
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Aminoglyc. Accumulation   Nephrotoxic (reversible) & Toxic to the Ear (irreversible)  
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Drugs that penatrate the BBB to the CSF   AG's, clindamycin  
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Difficult tissue to penetrate   Bone, synovial fluid, prostate, Abscesses, Peritoneal Fluid  
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DOC   Drug of Choice  
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IND   Indications  
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ADR   Adverse Reactions  
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W/P   Warnings & Precautions  
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SSSI   Skin & Soft Tissue Infections  
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Anaphylaxis   (IgE) Hives (Uticaria). Respiratory Difficulty (Bronchospasm). Swelling. Occurs within the first 72 hours.  
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Most common drug allergy   Penicillin  
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Penicillin ADR   Maculopapular rash, rash, uticarial rash, fever, bronchospasm, vasculitis, serum sickness, exfoliative dermatitis, Stevens-Johnson, Anaphylaxis (ordered in decreasing frequency & increasing severity.)  
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Penicillin half life   Short: 30-60 minutes (rapid renal excretion)  
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Penicillin Types   Natural, Penicillinase-resistant, Aminopenicillins, Extrended-spectrum ureidopenicillins, B-lactam/B-lactamase Inhibitors  
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Natural Penicillin Drugs & forms   Penicillin G (IV/IM) & Penicillin V (PO)  
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Natural Penicillin effective against...   B-hemolytic strept, most anaerobes, viridans strep, N. meningitidis.  
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Natural Penicillin DOC   Strep. Pneumoniae  
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Natural Penicillin R   Actinomyces, meningococcus, Pasteurella, S. Pneumoniae, S. pyogenes, T. Pallidum.  
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Natural Penicillin Pregnancy Category   C  
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Natural Penicillin ADR   Seizures or hemolytic anemia  
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Penicillinase-resistant penicillins drugs & forms   Oxacillin/Nafcillin (IV) & Dicloxacillin (PO-empty stomach)  
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Penicillinase-resistant penicillins effective against...   ?  
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Penicillinase-resistant penicillins ADR   GI cramps, rash, neutropenia (prolonged Rx - especially with nafcillin), acute interstitial nephritis  
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Aminopenicillin Drugs   Ampicillin (IV/PO), Amoxicillin (PO)  
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Aminopenicillin covers   Enterococci, E.coli, H. influenza, Proteus, Klebsiella  
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Aminopenicillin W/P   Renal Insufficiency & Cephalosporin allergy  
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Aminopenicillin ADR   Rash & GI upset  
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Extended-spectrum ureidopenicillins drugs & forms   Pipercillin (IV) usually used in combination!  
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Extended-spectrum ureidopenicillins covers   Anaerobes, enterobactericacae & pseudomonas  
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Extended-spectrum ureidopenicillins W/P   Severe renal impairment & allergies to cephalosporins  
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Extended-spectrum ureidopenicillins ADRs   GI & dermatology  
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B-lactamase inhibitor drugs   ampicillin/sulbactam (Unasyn - IV) Pipercillin/Tazobactam (Zosyn-IV) Aoxicillin/clavulante (Augmentin-PO)  
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Unasyn ingrediants   Ampicillin & sulbactam  
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Zosyn ingrediants   Pipercillin & tazobactam  
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Augmentin ingrediants   Amoxicillin & Clavulanate  
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B-lactamase inhibitor SE   Diarrhea (increased with clavulanate)  
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Penicillin Class drug interactions   Decrease OCP efficiancy. Increases warfarins effect.  
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Penicillin Class ADRs   Seizure potential with high doses. Inhibit platelet aggregation.  
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Cephalosporins types   1st generation-4th generation  
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Cephalosporins pregnancy categroy   B  
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Cephalosporins ADRs   Increase C. difficile colitis & VRE  
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1st generation cephalosporins drugs & forms   Cefazolin - Ancef(IV) & Cephalexin - Keflex (PO)  
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Cefazolin   Ancef  
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Cephalexin   Keflex  
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1st generation cephalosporins coverage   Better gm +  
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1st generation cephalosporins uses   surgical prophylaxis, SSSIs & UTI  
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2nd generation cephalosporins coverage   Less gram + & more gram -  
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2nd generation cephalosporins drugs   Cefuroxime (Ceftin) - PO. Cefotetan (Cefotan) - IV.  
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Cefuroxime (Ceftin) covers   strep, haemophilus, E. coli, Proteus, Klebsiella  
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Cefuroxime (Ceftin)uses   URI/L RTIs, Otitis Media, COPD exacerbations, sinusitis.  
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Cefuroxime   Ceftin  
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Cefotetan   Cefotan  
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Cefotetan (Cefotan) covers   B. frgilis & other bowel anaerobes  
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Cefotetan (Cefotan) uses   abdominal infections, bowel surgery prophylaxis, OB/GYN infections (PID)  
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3rd generation cephalosporin coverage   weak gram + & good gram -  
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3rd generation cephalosporin drugs   Ceftriaxone (Rocephin) - IV. Ceftazadime (Fortaz - IV. Cefpodoxime (Vantin) - PO. Cefixime (Suprax) - PO  
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Ceftriaxone   Rocephin  
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Ceftriaxone (Rocephin) ADRs   Biliary sludging b/c its eliminated via biliary excretion  
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Ceftriaxone (Rocephin) coverage   Severe gram (-) infection & Meningitis  
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Ceftazadime   Fortaz  
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Ceftazadime (Fortaz) coverage   Pseudomonas  
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Cefpodoxime   Vantin  
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Cefixime   Suprax  
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Cefpodoxime (Vantin) & Cefixime (Suprax) coverage   URIs & RTIs  
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4th Generation Cephalosporin drug & form   Cefepime (IV)  
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Cefepime covers   Pseudomonas, gram (-) rods (enterobacter, serratia & citrobacter).  
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Cefepime uses   Febrile neutropenia, hospital acquired pneumonia, serious gram (-) infections.  
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Carbapenems drugs   Imipenem/cilastatin (Primaxin) - IV. Meropenem (IV). Ertapenem (Invanz)- IV.  
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Primaxin   imipenem/cilastatin  
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Carbapenems covers   gram +'s including MSSA, grams -'s & anaerobes.  
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Primaxin (Imipenem/cilastatin) uses   pseudomonas & polymicrobial infections.  
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Primaxin (Imipenem/cilastatin) ADR   N/V & decreases seizure threshhold.  
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Primaxin (Imipenem/cilastatin) W/P   Hx of seizures  
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Primaxin (Imipenem/cilastatin) pregnancy category   C  
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Meropenem ADR   Less seizures & N/V  
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Meropenem pregnancy category   B  
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Meropenem coverage decreased in   Staph & strep  
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Ertapenem   Invanz  
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Ertapenem (Invanz) does not cover   pseudomonas  
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Monobactam drug & form   Aztreonam (Azactam) - IV  
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Aztreonam   Azactam  
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Aztreonam (Azactam) coverage   Gram negative ONLY  
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Aztreonam (Azactam) pregnancy category   B  
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Aztreonam (Azactam) SE   Well tolerated  
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Aminoglycoside drugs   Gentamicin, Tobramycin & amikacin (all IV; not absorbed well)  
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Aminoglycoside coverage   Gram - (Pseudomonas)  
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Aminoglycoside decreased effectivness by   Abscesses  
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Aminoglycoside Pregnancy category   D  
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Aminoglycoside uses   Always used in combo: serious gram (-) infections or b-lactam for synergy  
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Macrolides drugs   Erythromycin (Iv, PO, Opth). Clarithromycin (Biaxin) - PO. Azithromycin (Zithromax) - IV/PO  
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Clarithromycin   Biaxin  
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Azithromycin   Zithromax  
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Macrolides Pregnancy category   B (eryth, Azith) & C (Clarith)  
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Macrolides coverage   pneumococcus, atypicals, H. influenza  
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Macrolides Uses   OM, CAP, COPD, STD  
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Macrolides ADR   GI (take with food) & QT prolongation  
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Clarithromycin (Biaxin) DOC   Eryth-sensitive strains of streptococci  
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Azithromycin (Zithromax) DOC   H. Influenza & Chlamydia  
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Azithromycin (Zithromax) half life   68 hours  
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Fluoroquinolone drugs   Ofloxacin, ciprofloxacin (Cipro), Levofloxacin (Levaquin), Moxifloxacin (Avelox), Gatifloxacin (Tequin), Gemifloxacin (Factive)  
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Fluoroquinolone coverage   good gram (-), alright gram (+)  
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Fluoroquinolone DOC   Legionella  
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Cipro & Levaquin cover   Pseudomonas  
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Fluoroquinolone pregnancy category   C  
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Fluoroquinolone CI   <18y.o. (arthropathy)  
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Fluoroquinolone ADR   N/V/D, CNS (HA, restlessness), decrease seizure threshhold, tendon rupture (spontaneous - achilles), increase in AST/ALT  
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Fluoroquinolone DI   Aluminum/Mg antacids, sulcralfate, Ca2+, Fe2+ & Zinc - decrease absorption. Increases the effect of warfarin (except moxifloxacin & gatifloxacin)  
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Fluoroquinolone uses   CAP (includes atypicals), UTIs/pyelonephritis, COPD, acute exacerbation of chronic bronchitis, sinusitis  
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Tetracycline drugs   tetracycline, doxycycline, minocycline  
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Tetracycline coverage   Broad - including rickettsia, mycoplasma & chlamydia  
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Tetracycline pregnancy category   D  
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Tetracycline CI   < 8 y.o. (permanent discoloration of the teeth & inhibits bone growth)  
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Tetracycline Use   CAP, STD (Chlamydia), syphilis (pen-allergic pts.), Lyme dz, acne, community acquired MRSA  
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Tetracycline ADR   GI, photosensitivity, erosive esophagitis, vestibular sx (drunk/off balance), liver damage (rare)  
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Tetracycline DI   Increased effect of warfarin  
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Vancomycin Forms   IV & PO(C. difficile only)  
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Vancomycin MOA   Inhibits cell wall growth ("slowly" cidal)  
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Vancomycin coverage   gram +'s (MRSA, MRSE) & mild-mod anaerobic  
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Vancomycin pregnancy category   C  
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Vancomycin ADR   Redman syndrome (nonallergic rash on face/chest, flushing & hypotension), reversible neutopenia  
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Vancomycin administration   Given slowly (over an hour)  
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Vancomycin special abilities   Penetrates CSF  
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Clindamycin   Cleocin  
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Clindamycin (Cleocin) forms   IV, PO, Topical (acne), Vaginal  
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Clindamycin (Cleocin) class   Lincomycin  
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Clindamycin (Cleocin) MOA   Inhibits protein synthesis  
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Clindamycin (Cleocin) Coverage   **anaerobes** Strep & S. aureus (MRSA)  
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Clindamycin (Cleocin) use   anaerobic abscess, abdominal infections & Gyn  
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Clindamycin (Cleocin) ADR   N/V/D & rash - can cause C. Diff  
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Metronidazole   Flagyl  
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Metronidazole (Flagyl) MOA   Inhibits DNA synthesis  
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Clindamycin (Cleocin) coverage   anaerobes & ameoba  
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Clindamycin (Cleocin) uses   Abdominal abscess, C. diff, Rx trich, & H. pylori  
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Clindamycin (Cleocin) Pregnancy category   B (avoid 1st trimester)  
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Clindamycin (Cleocin) special abilities   Penetrate CSF  
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Clindamycin (Cleocin) ADR   N/V and alcohol reaction  
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TMP/SMZ   Trimethoprim/Sulfamethoxazole  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) forms   PO or IV  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) MOA   Inhibits folic acid synthesis (static)  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) pregnancy category   B but at 3rd trimester - term = D  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) coverage   Staph, strep, GNR's & Pneumocystis (prophylaxis for HIV pt.)  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) uses   UTIs, gram - infections, MRSA  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) DOC   PCP  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) ADR   Rash, CNS disturbances, photosensitivity, GI Sx.  
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TMP/SMZ (Trimethoprim/Sulfamethoxazole) Increase toxcity of...   warfarin, oral hypoglycemics, phenytoin, methotrexate, cyclosporin  
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Rifampin Form   PO  
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Rifampin MOA   Inhibits bacterial synthesis  
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Rifampin Uses   TB, Meningococcal prophylaxis, nasal carriers of MRSA  
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Rifampin ADR   GI upset, rash, turns secretions red-orange-brown, hepatotoxic, potent cyt P450 inhibitor  
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Linezolid   Zyvox  
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Linezolid (Zyvox) forms   IV & PO (100% available)  
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Linezolid (Zyvox) class   Oxazolidinone  
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Linezolid (Zyvox) coverage   Staph (MRSA), Coag (-) staph, strept, enterococci (VRE). Minor against anaerobes  
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Linezolid (Zyvox) ADR   Thrombocytopenia (reversible) or anemia  
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Linezolid (Zyvox) uses   variety of infections from MRSA and VRE  
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Synercid   Quinupristin/Dalfopristin  
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Synercide Quinupristin/Dalfopristin class   Streptogramin  
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Synercide Quinupristin/Dalfopristin form   IV via central line only!  
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Synercide Quinupristin/Dalfopristin coverage   MRSA, VRE  
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Synercide Quinupristin/Dalfopristin ADR   Myalgia, arthalgia  
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Synercide Quinupristin/Dalfopristin amount used   Rarely  
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Daptomycin Form   IV  
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Daptomycin coverage   MRSA  
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Daptomycin use   complicated skin & soft tissue infection  
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Tygecycline coverage   MRSA, VRE, strep, enteric GNRs, bowel anaerobes  
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Mupirocin   Bactroban  
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Mupirocin (Bactroban) form   Topical  
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Mupirocin (Bactroban) use   Impetigo due to S.aureus, group A strept (pyogenese) or decolonize the nasal passages of MRSA carriers (+/-)  
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Nitrofurantoin   Macrodantin  
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Nitrofurantoin (Macrodantin) coverage   gram +'s, enterococci, E. coli  
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Nitrofurantoin (Macrodantin) Pregnancy   B  
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Nitrofurantoin (Macrodantin) DI   decreased absorption with antacids  
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Nitrofurantoin (Macrodantin) W/P   G6PD deficiency = interstitial pulmonary fibrosis with chronic use.  
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Nitrofurantoin (Macrodantin) use   ONLY UTIS - Tx/prophylaxis  
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Bacteria that must be treated for > 4 weeks   S. Aureus bacteremia, endocarditis, ostomyelitis  
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Anti-Staphylococcal   **Nafcillin, oxacillin, dicloxacillin, cefazolin  
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Anti-MRSA   Vancomycin, Clindamycin, Doxycycline, TMP/SMZ, Linezolid, Quinupristin/dalfopristin, daptomycin, tygecycline.  
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Anti-anaerobic   Metronidazole, clindamycin, carbapenems, ceftotetan, Penicillin, B-lactamase inhibitors  
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Anti-pseudomonal   pipercillin/tazobactam, aminoglycosides, ceftazadime, cefepime, imipenem, meropenem, ciprofloxacin, levofloxacin.  
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