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BNF Chapter 5 Summary

  • Flucloxacillin – hepatic disorder, hepatitis can occur even after Tx stopped
  • Co-amoxiclav – cholestatic jaundice, >common over 65yrs, tx should not be > 14 days
  • Tobramycin (nebs) – use other inhalers first, then tobramycin nebs, monitor bronchospasm, can cause severe haemoptysis
  • Telithromycin - 1. hepatic disorder – dark urine, jaundice, N+V, 2. driving – visual disturbance, loss of consciousness, so admin at bedtime
  • Clindamycin - diarrhoa – fatal, discontinue if diarrhoa develops
  • Chloramphenicol – blood disorders
  • Daptomycin – muscle effects
  • Linezolid – 1. blood disorders 2. optic neuropathy 3. it is a reversible MAO i, avoid large amount of tyramine food, avoid concomitant MAOi, TCA, SSRI
  • Co-trimoxazole – use for acute exacerbation of chronic bronchitis and UTI with good reasons, can cause blood disorders, bone marrow supp, agranulocytosis
  • Trimethoprim – blood disorders
  • Isoniazid – hepatic disorder, peripheral neuropathy (give pyridoxine)
  • Pyrazinamide – hepatic disorder
  • Rifampicin – hepatic disorder, discolouration of soft contact lense, extra contraceptive measures
  • Ethambutol – visual disturbances
  • Ciprofloxacin – not for children due to arthropathy, tendonitis – concomitant use of corticosteroid increases risk
  • Amphotericin – anaphylaxis reaction with IV, test dose
  • Itraconazole – hepatotoxicity and heart failure – cautious
  • Ketoconazole – hepatotoxicity
  • Nucleoside reverse transcriptase inhibitor – Lactic acidosis in hepato impairment, pancreatitis – i.e. Didanosine
  • Abacavir – hypersensitivity
  • Protease inhibitor – hyperglycaemia, cautious with diabetes
  • Non-nucleoside RTI – Rash and Psychiatric problems

Extra Bits

Strains – staphylococcus, and pseudomonas aer

Staphylococcus – gram +ve, normally affects skin and nose
Staph Aureus – boils, impetigo, pimples, cellulitis
More serious infections – pneumonia, meningitis, endocarditis
Tx – Penicillin, but due to increase resistance, Flucloxacillin is 1st line

Pseudomonas aeruginosa – gram -ve, UTI, GI, Lungs
Resistant - penicillin and B-lactam Abx
Tx - quinolones, antipseud penicillin, aminoglycosides, cephalosporin

Broad Spectrum Abx

  • Penicillin – ampicillin, amoxicillin
  • Cephalosporin
  • Chloramphenicol
  • Tetracyclines
  • Macrolides
  • Aminoglycosides
  • Carbemenems

Misc

  • Aztreonam (beta-lactam) - Only active against Gram -ve , less likely to cause hypersensitivity in penicillin sensitive patients
  • Polymyxins – Active against Gram -ve , can cause nephro and neurotox
  • Linezolid – Only active against Gram +ve  – MRSA, alternative to vancomycin
  • Clindamycin – Only active against Gram +ve, active against anaerobes, joints and bones infection
  • Metronidazole – Active against anaerobes
  • Aminoglycosides – Inactive against anaerobes
  • Fusidic Acid – Narrow Spectrum – joints and bones infection
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