Tetracyclines, Macrolides, Clindamycin, & others Flashcards
Tetracycline
Mechanism of action
Prevents bacterial protein synthesis by binding to the 30S ribosomal subunit
Tetracyclines
Tetracycline
Doxycycline
Minocycline
Tigecycline
Prevents bacterial protein synthesis by binding to the 30S ribosomal subunit
Tetracycline
Mechanism of action
Tetracycline
Effects
Bacteriostatic activity against susceptible bacteria
Tetracycline
Clinical applications
Infections caused by mycoplasma, chlamydiae, rickettsiae, some spirochetes, malaria, H pylori, acne
Infections caused by mycoplasma, chlamydiae, rickettsiae, some spirochetes, malaria, H pylori, acne
Tetracycline
Clinical applications
Tetracycline
Pharmacokinetics, Toxicities, Interactions
Oral, mixed clearance (half-life 8 h), dosed every 6 h, divalent cations impair oral absorption, TOXICITY: Gastrointestinal upset, hepatotoxicity, photosensitivity, deposition in bone and teeth
Oral, mixed clearance (half-life 8 h), dosed every 6 h, divalent cations impair oral absorption, TOXICITY: Gastrointestinal upset, hepatotoxicity, photosensitivity, deposition in bone and teeth
Tetracycline
Pharmacokinetics, Toxicities, Interactions
Docycycline
Oral and IV; longer half-life (18 h) so dosed twice daily; nonrenal elimination; absorption is minimally affected by divalent cations; used to treat community-acquired pneumonia and exacerbation of bronchitis
Oral and IV; longer half-life (18 h) so dosed twice daily; nonrenal elimination; absorption is minimally affected by divalent cations; used to treat community-acquired pneumonia and exacerbation of bronchitis
Docycycline
Minocycline
Oral; longer half-life (16 h) so dosed twice daily; frequently causes reversible vestibular toxicity
Oral; longer half-life (16 h) so dosed twice daily; frequently causes reversible vestibular toxicity
Minocycline
Tigecycline
IV; unaffected by common tetracycline resistance mechanisms; very broad spectrum of activity against gram-positive, gram-negative, and anaerobic bacteria; nausea and vomiting are the primary toxicities
IV; unaffected by common tetracycline resistance mechanisms; very broad spectrum of activity against gram-positive, gram-negative, and anaerobic bacteria; nausea and vomiting are the primary toxicities
Tigecycline
Macrolides
Erythromycin
Clarithromycin
Azithromycin
Telithromycin
Erythromycin
Mechanism of action
Prevents bacterial protein synthesis by binding to the 50S ribosomal subunit
Erythromycin
Effects
Bacteriostatic activity against susceptible bacteria
Erythromycin
Clinical applications
Community-acquired pneumonia, pertussis, corynebacterial and chlamydial infections
Community-acquired pneumonia, pertussis, corynebacterial and chlamydial infections
Erythromycin
Clinical applications
Erythromycin
Pharmacokinetics, Toxicities, Interactions
Oral, IV, hepatic clearance (half-life 1.5 h), dosed every 6 h, cytochrome P450 inhibitor, TOXICITY: Gastrointestinal upset, hepatotoxicity, QTc prolongation
Oral, IV, hepatic clearance (half-life 1.5 h), dosed every 6 h, cytochrome P450 inhibitor, TOXICITY: Gastrointestinal upset, hepatotoxicity, QTc prolongation
Erythromycin
Pharmacokinetics, Toxicities, Interactions
Clarithromycin
Oral; longer half-life (4 h) so dosed twice daily; added activity versus M avium complex, toxoplasma, and M leprae
Oral; longer half-life (4 h) so dosed twice daily; added activity versus M avium complex, toxoplasma, and M leprae
Clarithromycin
Azithromycin
Oral, IV; very long half-life (68 h) allows for once- daily dosing and 5-day course of therapy of community-acquired pneumonia; does not inhibit cytochrome P450 enzymes