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Amoxicillin (INN) or amoxycillin (former BAN) is a moderate-spectrum β-lactam antibiotic used to treat bacterial infections caused by susceptible microorganisms. It is usually the drug of choice within the class because it is better absorbed, following oral administration, than other beta-lactam antibiotics. Amoxicillin is susceptible to degradation by β-lactamase-producing bacteria, and so may be given with Clavulanic acid to increase its susceptability (see below). It is currently marketed by GlaxoSmithKline under the trade name Amoxil®.

Amoxicillin Drug

Mode of action
Amoxicillin acts by inhibiting the synthesis of bacterial cell walls. It inhibits cross-linkage between the linear peptidoglycan polymer chains that make up a major component of the cell wall of Gram-positive bacteria.

Main article: beta-lactam antibiotic

Amoxicillin is a moderate-spectrum antibiotic active against a wide range of Gram-positive, and a limited range of Gram-negative organisms. Some examples of susceptible and resistant organisms, from the Amoxil® Approved Product Information (GSK, 2003), are listed below.

Resistant organisms
Penicillinase producing organisms, particularly penicillinase producing Staphylococcus spp. Penicillinase-producing N. gonorrhoeae and H. influenzae are also resistant

All strains of Pseudomonas spp., Klebsiella spp., Enterobacter spp., indole-positive Proteus spp., Serratia marcescens, and Citrobacter spp. are resistant.

The incidence of β-lactamase-producing resistant organisms, including E. coli, appears to be increasing.

Doubling the routinely given concentration (in pediatrics) of amoxicillin has been shown to eradicate intermediately resistant organisms (Red Book, 2003 Report of the Committee on Infectious Diseases, American Academy of Pediatrics).

Amoxicillin in trihydrate form is avaialable as capsules or syrup for oral use, and as the sodium salt for intravenous administration.

Amoxicillin and Clavulanic acid
Amoxicillin (in either trihydrate or sodium salt forms) may be combined with Clavulanic acid (as potassium clavulanate), a β-lactamase inhibitor, to increase the spectrum of action against Gram-negative organisms, and to overcome bacterial antibiotic resistance mediated through β-lactamase production. This formulation is referred to as Co-amoxiclav (British Approved Name), but more commonly by proprietary names such as Augmentin® and Clamoxyl®.

Main article: Co-amoxiclav

Proprietary Preparations
The patent for amoxicillin has expired. Thus amoxicillin is marketed under many trade names including: Actimoxi®, Amoxibiotic®, Amoxicilina®, Dispermox®,Pamoxicillin®, Lamoxy®, Ospamox®, Polymox®, Trimox®, Tolodina®, Wymox® and Zimox®.

Other useful drug information: Acyclovir | Adderall | Aspirin | Azathioprine | Propoxyphene | Lamisil | Toprol

Page Content: amoxicillin side effects , amoxicillin dosage , amoxicillin use , allergic reaction to amoxicillin , amoxicillin alcohol , amoxicillin and clavulanate potassium , amoxicillin allergy , amoxicillin rash .

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