Amifloxacin

Amifloxacin

Chemical structure of Amifloxacin

Amifloxacin is a fluoroquinolone antibiotic that is used to treat a variety of bacterial infections. It is part of the quinolone class of antibiotics, which are known for their broad-spectrum activity against both Gram-positive and Gram-negative bacteria.

Mechanism of Action

Amifloxacin works by inhibiting bacterial DNA gyrase and topoisomerase IV, enzymes that are essential for DNA replication and transcription. By interfering with these processes, amifloxacin effectively halts bacterial cell division and leads to cell death.

Clinical Uses

Amifloxacin is used to treat a variety of infections, including:

• Urinary tract infections
• Respiratory tract infections
• Gastrointestinal infections
• Skin and soft tissue infections

Side Effects

Common side effects of amifloxacin include:

• Nausea
• Diarrhea
• Headache
• Dizziness

Serious side effects can include tendonitis and tendon rupture, particularly in older adults and those taking corticosteroids.

Pharmacokinetics

Amifloxacin is well absorbed from the gastrointestinal tract and has a high bioavailability. It is widely distributed throughout the body and is primarily excreted by the kidneys.

Resistance

Bacterial resistance to amifloxacin can occur through mutations in the gyrA and parC genes, which encode the target enzymes DNA gyrase and topoisomerase IV, respectively. Efflux pumps and decreased permeability of the bacterial cell wall can also contribute to resistance.

Related Pages

• Fluoroquinolone
• Antibiotic
• Bacterial infection
• DNA gyrase