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Clarithromycin, sold under the brand name Biaxin among others, is an antibiotic used to treat various bacterial infections. [3] This includes strep throat, pneumonia, skin infections, H. pylori infection, and Lyme disease, among others. [3] Clarithromycin can be taken by mouth as a tablet or liquid or can be infused intravenously. [3]
Patients with hypersensitivity to clarithromycin, erythromycin, or any of the macrolide antibiotics should not take this medication. [41] Additionally, if patients are diagnosed with liver dysfunction before the treatment, clarithromycin is also contraindicated. [41]
In areas of low clarithromycin resistance, including the United States, a 14-day course of "triple therapy" with an oral proton pump inhibitor, clarithromycin 500 mg, and amoxicillin 1 g (or, if penicillin allergic, metronidazole 500 mg), all given twice daily for 14 days, is recommended for first-line therapy. This regimen can achieve rates of ...
These modifications do not change their broad antibacterial activity, but do affect pharmacological properties such as half-life and binding to proteins in serum. [ 1 ] Tetracyclines were discovered in the 1940s and exhibited activity against a wide range of microorganisms including gram-positive and gram-negative bacteria , chlamydiota ...
The production of a β-lactamase by a bacterium does not necessarily rule out all treatment options with β-lactam antibiotics. In some instances, β-lactam antibiotics may be co-administered with a β-lactamase inhibitor. For example, Augmentin (FGP) is made of amoxicillin (a β-lactam antibiotic) and clavulanic acid (a β-lactamase inhibitor).
[1] [4] It contains vonoprazan (as the fumarate), a potassium-competitive acid blocker; amoxicillin, a beta-lactam antibiotic; and clarithromycin, a macrolide antibiotic. [ 1 ] [ 4 ] It was approved for medical use in Japan in 2016, [ 3 ] and in the United States in May 2022.
This is because some macrolides (clarithromycin and erythromycin, not azithromycin) are potent inhibitors of the cytochrome P450 system, particularly of CYP3A4. Macrolides, mainly erythromycin and clarithromycin, also have a class effect of QT prolongation, which can lead to torsades de pointes.
In the original studies that gave rise to its approval for the eradication of H. pylori, rabeprazole was studied in combination with amoxicillin and clarithromycin. This triple therapy was studied at the specific doses of rabeprazole 20 mg twice daily, amoxicillin 1000 mg twice daily, and clarithromycin 500 mg twice daily for 7 days, which is a ...