Podcast
Questions and Answers
What is the mechanism of action of macrolides?
What is the mechanism of action of macrolides?
Macrolides inhibit protein synthesis by binding with the 50s ribosome.
What are three common mechanisms of bacterial resistance to macrolides?
What are three common mechanisms of bacterial resistance to macrolides?
The three common mechanisms of bacterial resistance to macrolides are modification of the ribosomal binding site, production of esterases, and reduced permeability.
What is the antimicrobial spectrum of Erythromycin?
What is the antimicrobial spectrum of Erythromycin?
- Limited to Gram-positive bacteria
- Similar to Penicillin G (correct)
- Specific for fungal infections
- Effective against all bacteria
Which routes of administration are available for Erythromycin?
Which routes of administration are available for Erythromycin?
What is a common use of Erythromycin?
What is a common use of Erythromycin?
What is a major adverse drug reaction associated with macrolides?
What is a major adverse drug reaction associated with macrolides?
What are three common adverse drug reactions associated with Erythromycin?
What are three common adverse drug reactions associated with Erythromycin?
What type of drug interaction is characteristic of Erythromycin?
What type of drug interaction is characteristic of Erythromycin?
What is Roxithromycin known for?
What is Roxithromycin known for?
What is the usual route of administration for Roxithromycin?
What is the usual route of administration for Roxithromycin?
What is the common dose of Roxithromycin?
What is the common dose of Roxithromycin?
What is the mode of action of Clarithromycin?
What is the mode of action of Clarithromycin?
What are the routes of administration for Clarithromycin?
What are the routes of administration for Clarithromycin?
What is the typical dosage of Clarithromycin?
What is the typical dosage of Clarithromycin?
What is a noteworthy use for Clarithromycin?
What is a noteworthy use for Clarithromycin?
How is Azithromycin typically administered?
How is Azithromycin typically administered?
What is the standard dose of Azithromycin?
What is the standard dose of Azithromycin?
What are some uses for Azithromycin?
What are some uses for Azithromycin?
What is a notable use for Spiromycin?
What is a notable use for Spiromycin?
What are some common adverse drug reactions associated with Spiromycin?
What are some common adverse drug reactions associated with Spiromycin?
What is the main use for Telithromycin?
What is the main use for Telithromycin?
Which of the following statements about macrolides is true?
Which of the following statements about macrolides is true?
Macrolides can cause cross-resistance with other antibiotics.
Macrolides can cause cross-resistance with other antibiotics.
Erythromycin is the only macrolide that can be administered topically.
Erythromycin is the only macrolide that can be administered topically.
Which macrolide is known for its use in treating H. pylori associated peptic ulcer disease?
Which macrolide is known for its use in treating H. pylori associated peptic ulcer disease?
Macrolides are generally contraindicated in pregnancy.
Macrolides are generally contraindicated in pregnancy.
The most common adverse drug reaction associated with macrolides is allergic reactions.
The most common adverse drug reaction associated with macrolides is allergic reactions.
Macrolides are a newer class of antibiotics developed in the 21st century.
Macrolides are a newer class of antibiotics developed in the 21st century.
The mode of action of macrolides is the same as that of penicillins.
The mode of action of macrolides is the same as that of penicillins.
All macrolides are effective against Mycobacterium tuberculosis.
All macrolides are effective against Mycobacterium tuberculosis.
Macrolides are the only class of antibiotics that can cause QT prolongation.
Macrolides are the only class of antibiotics that can cause QT prolongation.
Macrolides are generally considered safe and well-tolerated drugs.
Macrolides are generally considered safe and well-tolerated drugs.
Flashcards
Macrolide Antibiotics
Macrolide Antibiotics
A class of antibiotics that inhibit bacterial protein synthesis by binding to the 50S ribosomal subunit, preventing the formation of peptide bonds.
Bacteriostatic
Bacteriostatic
The action of a drug that inhibits bacterial growth but does not kill the bacteria.
Resistance to Macrolides
Resistance to Macrolides
The ability of bacteria to resist the effects of an antibiotic, often due to mutations in their ribosomes or the production of enzymes that degrade the antibiotic.
Cross-resistance
Cross-resistance
Signup and view all the flashcards
Erythromycin
Erythromycin
Signup and view all the flashcards
Antimicrobial Spectrum
Antimicrobial Spectrum
Signup and view all the flashcards
Oral Route of Administration
Oral Route of Administration
Signup and view all the flashcards
Intravenous Infusion (IV)
Intravenous Infusion (IV)
Signup and view all the flashcards
Thrombophlebitis
Thrombophlebitis
Signup and view all the flashcards
Torsades de Pointes
Torsades de Pointes
Signup and view all the flashcards
Hepatic Microsomal Enzyme
Hepatic Microsomal Enzyme
Signup and view all the flashcards
Hepatic Microsomal Enzyme Inhibitor
Hepatic Microsomal Enzyme Inhibitor
Signup and view all the flashcards
Roxithromycin
Roxithromycin
Signup and view all the flashcards
Clarithromycin
Clarithromycin
Signup and view all the flashcards
Azithromycin
Azithromycin
Signup and view all the flashcards
Spiramycin
Spiramycin
Signup and view all the flashcards
Telithromycin
Telithromycin
Signup and view all the flashcards
Pertussis
Pertussis
Signup and view all the flashcards
Diphtheria
Diphtheria
Signup and view all the flashcards
Chancroid
Chancroid
Signup and view all the flashcards
Chlamydial Infections
Chlamydial Infections
Signup and view all the flashcards
Epididymitis
Epididymitis
Signup and view all the flashcards
Urethritis
Urethritis
Signup and view all the flashcards
Pneumonia
Pneumonia
Signup and view all the flashcards
Pelvic Inflammatory Disease (PID)
Pelvic Inflammatory Disease (PID)
Signup and view all the flashcards
Conjunctivitis
Conjunctivitis
Signup and view all the flashcards
Trachoma
Trachoma
Signup and view all the flashcards
Legionnaire's Disease
Legionnaire's Disease
Signup and view all the flashcards
Campylobacter Enteritis
Campylobacter Enteritis
Signup and view all the flashcards
Toxoplasmosis
Toxoplasmosis
Signup and view all the flashcards
Cryptosporidiosis
Cryptosporidiosis
Signup and view all the flashcards
Meningococcal Meningitis
Meningococcal Meningitis
Signup and view all the flashcards
Syphilis
Syphilis
Signup and view all the flashcards
Gonorrhea
Gonorrhea
Signup and view all the flashcards
Typhoid
Typhoid
Signup and view all the flashcards
Study Notes
Macrolides
- Macrolides are a class of antibiotics.
- Examples include erythromycin, clarithromycin, roxithromycin, azithromycin, and spiramycin.
- These antibiotics are bacteriostatic, inhibiting protein synthesis by binding to 50S ribosomes.
- Resistance mechanisms include modification of ribosomal binding sites, production of esterases, and reduced permeability.
- Cross-resistance exists between macrolides, clindamycin, and chloramphenicol.
- Erythromycin has a similar antimicrobial spectrum to penicillin G, active against Gram-positive and Gram-negative bacteria, Mycoplasma, Chlamydia, Rickettsiae, and Spirochetes.
- Routes of administration for erythromycin include oral (base, estolate, stearate, ethyl succinate), and intravenous (lactobionate and gluceptate).
- Erythromycin dosage is typically 250-500mg four times a day (q.i.d).
- Uses of erythromycin include dental infections, periodontal and periapical abscesses, ANUG (acute necrotizing ulcerative gingivitis), post-extraction infections, pertussis, diphtheria, treatment of Corynebacterium diphtheriae, chancroid, and chlamydial infections (e.g., pneumonia, psittaci).
- Roxithromycin is a long-acting, acid-stable macrolide, dosed twice daily. It is similar to erythromycin in its spectrum.
- Administration of roxithromycin is oral, with a dose of 150mg twice daily before meals.
- Oral, intravenous, and eyedrop administrations are options for azithromycin. Its dosage is 500mg once daily.
- Azithromycin has a wide spectrum of use including chlamydial and legionnaire's pneumonia, epididymitis, NGU (Nongonococcal urethritis), lymphogranuloma venerium, pelvic inflammatory disease, trachoma, infections and chancroid.
- Clarithromycin usage is similar to erythromycin with additional activities against H. pylori, Mycobacterium avium, intracellular, Mycobacterium leprae, and various protozoa and has broad usage.
- Its dosage is 250mg twice a day for 7 days, and 500mg twice a day for 14 days in severe cases.
- Uses of clarithromycin include odontologic infections, atypical pneumonia, H. pylori infections, legionnaire's disease, and MAC infections in HIV patients.
- Spiramycin is used against anaerobic organisms and is synergistic with metronidazole. It is given orally. Uses include toxoplasmosis, cryptosporidiosis, and chlamydial/gonococcal infections.
- Telithromycin is a ketolide. It is used orally on a daily basis for various respiratory infections.
- Adverse reactions may include gastrointestinal problems (nausea, vomiting, diarrhea, abdominal pain, anorexia), hepatotoxicity (jaundice), allergic reactions and hypersensitivity including rashes, pruritis and urticaria), headache and vertigo, and potentially reversible sensory neural deafness.
- Drug interactions with macrolides can occur, notably with QT prolongation (Torsades de pointes).
- Some contraindications exist, including pregnancy.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.