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Ampicillin is an antibiotic belonging to the aminopenicillin class of the penicillin family. The drug is used to prevent and treat several bacterial infections , such as respiratory tract infections , urinary tract infections , meningitis , salmonellosis , and endocarditis . [ 7 ]
Ampicillin/sulbactam is a combination of a β-lactam antibiotic and a β-lactamase inhibitor. Ampicillin works by binding to penicillin-binding proteins (PBPs) to inhibit bacterial cell wall synthesis. [13] [14] This causes disruption of the bacterial cell wall and leads to bacterial cell death.
β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.
The aminopenicillins are a group of antibiotics in the penicillin family that are structural analogs of ampicillin (which is the 2-amino derivative of benzylpenicillin, hence the name). [1] Like other penicillins and beta-lactam antibiotics , they contain a beta-lactam ring that is crucial to its antibacterial activity.
The usual dose by mouth is one capsule of 250 mg 4 times a day in adults and half the adult dose as a syrup for children under the age of 10 years but over 2. [4] For children below the age of 2 years, the oral dose is a quarter of the adult oral dose. [3] Ampicillin/flucloxacillin is taken orally about half an hour before food. [5]
Augmentin 250, for example, contains 250 mg of amoxicillin and 125 mg of clavulanic acid. [12] [27] An intravenous preparation has been available in the UK since 1985, [28] but no parenteral preparation is available in the US; [citation needed] the nearest equivalent is ampicillin/sulbactam. [citation needed]
The extended-spectrum penicillins are a group of antibiotics that have the widest antibacterial spectrum of all penicillins. [1] Some sources identify them with antipseudomonal penicillins, [2] others consider these types to be distinct. [3]
Amoxicillin (α-amino-p-hydroxybenzyl penicillin) is a semisynthetic derivative of penicillin with a structure similar to ampicillin but with better absorption when taken by mouth, thus yielding higher concentrations in blood and in urine. [58] Amoxicillin diffuses easily into tissues and body fluids.