Macrolides & ketolides
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
---|---|---|---|---|---|
MOA of macrolides is | Reversible binding of the 50S subunit of domain V thus inhibiton of translation (same as clindamycin and chloramphemicol)
🗑
|
||||
MOA of ketolides | Reversible binding to Domain V and Domain II of 50 S subunit of ribosome thus blocking translation
🗑
|
||||
Macrolides are considered what type of killing | Bacterostatic for many but for S. pyrogenes (group A) and S. pneumoniae they are bacteriocidal.
🗑
|
||||
Resistance of macrolides | Permibility (gram-), enzymatic inactivation, efflux, single alterations in 23S subunit of 50S decreased binding, methylation of 23S subunit of 50S caused alteration o binding
🗑
|
||||
Resistance of ketolide | Scarce, alteration in telithromycin binding site via chromosomal or plasmid mutations
🗑
|
||||
Erythromycin ADME | inactivated byy gastric acids requires capsulation, distribution into all tissues (not CNS), metabolism via p450, elimination fecal
🗑
|
||||
Clarithromycin ADME | Good stability, extensive distribution,active metabolite
🗑
|
||||
Azrithromycin ADME | Acid stable, reduced with food. Hepatic metaoblism, Elimination may require weeks!!!
🗑
|
||||
Gram + aerobe activity of macrolides | Good,: staph, strep (poor-MRSA, enterococci)
🗑
|
||||
Gram- aerobic activity of macrolides | Moderate: neisseria gonorrhowae, M. catarrhalis, H. inf, Some activity against enterobacteriaw (shigellam campylobacter, vibrio)
🗑
|
||||
Anaerobic acitivty of macrolides | Little
🗑
|
||||
Atypical activity of macrolides | DRUGS OF CHOICE
🗑
|
||||
Other microbes macrolides cover | Borrelia burgdorferi, mycobacterium, H. pylori
🗑
|
||||
Macrolide side effects | GI (N/V, DIa), thrombophlebitis, ALL, hepatotoxic, ototoxic, superinfection, torsades de points, pseudomembraneous colitis
🗑
|
||||
Erythromycin DI | buspirone, carbamazepines, clomiramine respiradone, clozapine, cyclosporin, digoxin, felodpine, lovastatin, methylprednisolone, midazolam, phenytion, tacrolimus, theophylline,valproate, warfarin
🗑
|
||||
Claithromycin DI | carbamazepine, cyclosporin, digoxin, rifampin, rifabutin, ritnoravie, zidovudine
🗑
|
||||
Azithromycin DI | Cyclosporin
🗑
|
||||
Ketolides ADME | moderate abs, VD moderare 2.9L, T1/2 10 hours, metabolism is Cp450 inhibition (huge), with 80%various elimination methods
🗑
|
||||
Ketolide spectrum of activity: | Respiratory tract, S. pneumonia, pyrogenes, agalactiaw, H. infl, M. catarrhalis, C. pneumoniaw, L. pneumoniaw, M. pneumoniae, B. pertussis, MSSA
🗑
|
||||
Ketolide SE | GI most common, hepatotoxcity, ocular rate
🗑
|
||||
Ketolide DI | Simvastatin and lovastatin can cause increase in statin and decrease AB. Rifampin causes autoinduction of self and ketolides
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
liza001
Popular Pharmacology sets