Cinoxacin: Difference between revisions

Latest revision as of 10:48, 23 March 2025

Cinoxacin[edit]

Cinoxacin is a synthetic antibiotic belonging to the class of quinolone antibiotics. It was primarily used to treat urinary tract infections (UTIs) caused by susceptible strains of bacteria. Cinoxacin was one of the earlier quinolones developed and was introduced in the 1970s.

Chemical Properties[edit]

Cinoxacin is a naphthyridine derivative, which is structurally related to other quinolones. Its chemical formula is C12H10N2O5, and it has a molecular weight of 262.22 g/mol. The compound is characterized by a bicyclic structure that includes a carboxylic acid group, which is essential for its antibacterial activity.

Mechanism of Action[edit]

Cinoxacin works by inhibiting bacterial DNA gyrase and topoisomerase IV, enzymes that are critical for DNA replication and transcription. By interfering with these enzymes, cinoxacin prevents the bacteria from replicating and repairing their DNA, leading to bacterial cell death.

Clinical Use[edit]

Cinoxacin was primarily used to treat uncomplicated urinary tract infections. It was effective against a range of Gram-negative bacteria, including Escherichia coli, Proteus mirabilis, and Klebsiella pneumoniae. However, its use has declined with the development of newer quinolones that have broader spectra of activity and improved pharmacokinetic properties.

Pharmacokinetics[edit]

Cinoxacin is well absorbed from the gastrointestinal tract after oral administration. It is widely distributed in body tissues and fluids, including the kidneys and urinary tract, which makes it effective for treating UTIs. The drug is primarily excreted unchanged in the urine.

Side Effects[edit]

Common side effects of cinoxacin include gastrointestinal disturbances such as nausea, vomiting, and diarrhea. Some patients may experience central nervous system effects like dizziness and headache. As with other quinolones, there is a risk of tendonitis and tendon rupture, although this is more common with newer agents.

Resistance[edit]

Bacterial resistance to cinoxacin can occur through mutations in the genes encoding DNA gyrase and topoisomerase IV, or through the acquisition of resistance genes via plasmids. The development of resistance has limited the clinical utility of cinoxacin and other early quinolones.

Discontinuation[edit]

Cinoxacin is no longer widely used in clinical practice, having been largely replaced by newer quinolones with improved efficacy and safety profiles. The availability of more potent and less toxic alternatives has led to a decline in its use.

Related Pages[edit]

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-'''Cinoxacin''' is a synthetic [[antibacterial]] agent that belongs to the class of [[quinolone antibiotics]]. It is primarily used in the treatment of urinary tract infections (UTIs) caused by susceptible bacteria. Cinoxacin works by inhibiting the bacterial enzyme DNA gyrase, which is essential for DNA replication, transcription, repair, and recombination. This action leads to the death of the bacteria and the resolution of the infection.
+== Cinoxacin ==
-==Mechanism of Action==
+[[File:Cinoxacin.svg|thumb|right|Chemical structure of Cinoxacin]]
-Cinoxacin exerts its antibacterial effect by targeting the DNA gyrase enzyme in bacteria. DNA gyrase is a type II topoisomerase that introduces negative supercoils into DNA, which is a critical step in DNA replication and transcription. By inhibiting this enzyme, cinoxacin prevents the replication of bacterial DNA, leading to the elimination of the bacteria causing the infection.
-==Indications==
+'''Cinoxacin''' is a synthetic [[antibiotic]] belonging to the class of [[quinolone]] antibiotics. It was primarily used to treat [[urinary tract infection]]s (UTIs) caused by susceptible strains of bacteria. Cinoxacin was one of the earlier quinolones developed and was introduced in the 1970s.
-Cinoxacin is indicated for the treatment of acute, uncomplicated urinary tract infections caused by susceptible strains of the following microorganisms:
-* [[Escherichia coli]]
-* [[Proteus mirabilis]]
-* [[Klebsiella pneumoniae]]
-* [[Staphylococcus saprophyticus]]
-It is important to note that cinoxacin is not recommended for the treatment of pyelonephritis or perinephric abscesses due to insufficient data supporting its efficacy in these conditions.
+== Chemical Properties ==
+Cinoxacin is a [[naphthyridine]] derivative, which is structurally related to other quinolones. Its chemical formula is C12H10N2O5, and it has a molecular weight of 262.22 g/mol. The compound is characterized by a bicyclic structure that includes a carboxylic acid group, which is essential for its antibacterial activity.
-==Pharmacokinetics==
+== Mechanism of Action ==
-After oral administration, cinoxacin is absorbed from the gastrointestinal tract. Its bioavailability is approximately 90%, and peak plasma concentrations are reached within 1 to 2 hours. The presence of food can delay the absorption but does not significantly affect the overall bioavailability. Cinoxacin is minimally metabolized in the liver and is primarily excreted unchanged in the urine, where it achieves high concentrations that are effective against urinary pathogens.
+Cinoxacin works by inhibiting bacterial [[DNA gyrase]] and [[topoisomerase IV]], enzymes that are critical for [[DNA replication]] and [[transcription]]. By interfering with these enzymes, cinoxacin prevents the bacteria from replicating and repairing their DNA, leading to bacterial cell death.
-==Adverse Effects==
+== Clinical Use ==
-The most common adverse effects associated with cinoxacin include:
+Cinoxacin was primarily used to treat uncomplicated urinary tract infections. It was effective against a range of [[Gram-negative bacteria]], including ''[[Escherichia coli]]'', ''[[Proteus mirabilis]]'', and ''[[Klebsiella pneumoniae]]''. However, its use has declined with the development of newer quinolones that have broader spectra of activity and improved pharmacokinetic properties.
-* Nausea
-* Vomiting
-* Diarrhea
-* Rash
-* Headache
-* Dizziness
-As with other quinolones, cinoxacin may cause tendinitis or tendon rupture, particularly in older adults, those on corticosteroid therapy, and in patients with kidney, heart, or lung transplants. Patients should be advised to stop taking cinoxacin at the first sign of tendon pain, swelling, or inflammation.
+== Pharmacokinetics ==
+Cinoxacin is well absorbed from the gastrointestinal tract after oral administration. It is widely distributed in body tissues and fluids, including the kidneys and urinary tract, which makes it effective for treating UTIs. The drug is primarily excreted unchanged in the urine.
-==Contraindications==
+== Side Effects ==
-Cinoxacin is contraindicated in patients with a history of hypersensitivity to cinoxacin, other quinolones, or any component of the formulation. Caution is advised in patients with a history of seizure disorders, as quinolones may lower the seizure threshold.
+Common side effects of cinoxacin include [[gastrointestinal]] disturbances such as [[nausea]], [[vomiting]], and [[diarrhea]]. Some patients may experience [[central nervous system]] effects like [[dizziness]] and [[headache]]. As with other quinolones, there is a risk of [[tendonitis]] and [[tendon rupture]], although this is more common with newer agents.
-==Drug Interactions==
+== Resistance ==
-Cinoxacin may interact with several other medications, including:
+Bacterial resistance to cinoxacin can occur through mutations in the genes encoding DNA gyrase and topoisomerase IV, or through the acquisition of resistance genes via plasmids. The development of resistance has limited the clinical utility of cinoxacin and other early quinolones.
-* Antacids containing magnesium or aluminum, as well as sucralfate, can decrease the absorption of cinoxacin, leading to reduced efficacy.
-* Caffeine: Cinoxacin may increase the half-life of caffeine, leading to increased effects or toxicity.
-* Warfarin: Cinoxacin may enhance the effects of warfarin, increasing the risk of bleeding.
-Patients should be advised to inform their healthcare provider of all medications they are taking, including over-the-counter drugs and dietary supplements.
+== Discontinuation ==
+Cinoxacin is no longer widely used in clinical practice, having been largely replaced by newer quinolones with improved efficacy and safety profiles. The availability of more potent and less toxic alternatives has led to a decline in its use.
-==Conclusion==
+== Related Pages ==
-Cinoxacin is a quinolone antibiotic used in the treatment of uncomplicated urinary tract infections caused by susceptible bacteria. Its mechanism of action involves the inhibition of bacterial DNA gyrase, leading to bacterial cell death. While effective, it is associated with certain adverse effects and drug interactions that should be considered before use. As with all antibiotics, it is important to use cinoxacin as directed by a healthcare provider to ensure the best possible outcome and to help prevent the development of antibiotic resistance.
+* [[Quinolone]]
+* [[Urinary tract infection]]
+* [[Antibiotic resistance]]
+[[Category:Quinolone antibiotics]]
 [[Category:Antibiotics]]
-[[Category:Quinolone antibiotics]]
-{{medicine-stub}}