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Ceftolozane contains a 7-aminothiadiazole, affording increased activity against gram-negative organisms, as well as an alkoximino group, providing stability against many β-lactamases. Ceftolozane has a dimethylacetic acid moiety that contributes to enhanced activity against Pseudomonas aeruginosa. The addition of a bulky side chain (a pyrazole ...
It retains some activity of later-generation cephalosporins having broad-spectrum activity against Gram-negative bacteria, but its effectiveness is relatively much weaker. [4] [5] It is currently being investigated for community-acquired pneumonia [6] and complicated skin and skin structure infection. [7] [8] [9]
Gram-negative: Third-generation cephalosporins have a broad spectrum of activity and further increased activity against gram-negative organisms. They may be particularly useful in treating hospital-acquired infections , although increasing levels of extended-spectrum beta-lactamases are reducing the clinical utility of this class of antibiotics.
The basic structure of 3rd generation cephalosporins. The majority of third generation cephalosporins have the aminothiazole group at position C-7. Different groups are found at the 7-α-position like 7-α-iminohydroxy and 7-α-iminomethoxy groups. Ceftibuten however possesses a 7-α-ethylidene group. This group gives ceftibuten higher ...
Currently marketed β-lactamase inhibitors are not sold as individual drugs. Instead they are co-formulated with a β-lactam antibiotic with a similar serum half-life. This is done not only for dosing convenience, but also to minimize resistance development that might occur as a result of varying exposure to one or the other drug.
Cefiderocol may cause serious and life-threatening allergic reactions, severe diarrhea caused by C. difficile and seizures. [9]An increased rate of mortality was observed in people treated with cefiderocol as compared to other antibiotics in a separate clinical trial in critically ill people with multidrug-resistant Gram-negative bacterial infections.
Cefoperazone contains an N-methylthiotetrazole (NMTT or 1-MTT) side chain.As the antibiotic is broken down in the body, it releases free NMTT, which can cause hypoprothrombinemia (likely due to inhibition of the enzyme vitamin K epoxide reductase) and a reaction with ethanol similar to that produced by disulfiram (Antabuse effect), due to inhibition of aldehyde dehydrogenase.
Cefdinir, sold under the brand name Omnicef among others, is an antibiotic used to treat pneumonia, otitis media, strep throat, and cellulitis. [1] It is a less preferred option for pneumonia, otitis media, and strep throat which may be used in those with a severe penicillin allergy. [1]