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Pronunciation |
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(sin
OKS a
sin) |

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U.S. Brand
Names |
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Cinobac®
Pulvules® |

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Generic
Available |
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No |

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Pharmacological Index |
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Antibiotic, Quinolone |

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Use |
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Treatment of urinary tract infections |

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Pregnancy Risk
Factor |
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B |

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Contraindications |
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History of convulsive disorders, hypersensitivity to cinoxacin or any
component or other quinolones |

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Warnings/Precautions |
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CNS stimulation may occur (tremor, restlessness, confusion, and very rarely
hallucinations or seizures). Use with caution in patients with known or
suspected CNS disorders or renal impairment. Not recommended in children <18
years of age, ciprofloxacin (a related compound), has caused a transient
arthropathy in children; prolonged use may result in superinfection; modify
dosage in patients with renal impairment. |

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Adverse
Reactions |
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Generally well tolerated
Central nervous system: Headache, dizziness
Gastrointestinal: Heartburn, abdominal pain, GI bleeding, belching,
flatulence, anorexia, nausea
<1%: Insomnia, confusion, seizures (rare), diarrhea, thrombocytopenia,
photophobia, tinnitus |

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Overdosage/Toxicology |
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Symptoms of overdose include acute renal failure, seizures
GI decontamination and supportive care; not removed by peritoneal or
hemodialysis |

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Drug
Interactions |
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Decreased effect: Decreased urine levels with probenecid; decreased
absorption with aluminum-, magnesium-, calcium-containing antacids
Increased serum levels: Probenecid |

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Mechanism of
Action |
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Inhibits microbial synthesis of DNA with resultant inhibition of protein
synthesis |

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Pharmacodynamics/Kinetics |
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Absorption: Oral: Rapid and complete; food decreases peak levels by 30% but
not total amount absorbed
Distribution: Crosses the placenta; concentrates in prostate tissue
Protein binding: 60% to 80%
Half-life: 1.5 hours, prolonged in renal impairment
Time to peak serum concentration: Oral: Within 2-3 hours
Elimination: ~60% excreted as unchanged drug in urine |

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Usual Dosage |
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Children >12 years and Adults: Oral: 1 g/day in 2-4 doses for 7-14 days
Clcr 20-50 mL/minute: 250 mg twice daily
Clcr <20 mL/minute: 250 mg/day |

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Mental Health: Effects
on Mental Status |
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May cause dizziness, insomnia or confusion; quinolones reported to cause
restlessness, hallucinations, euphoria, depression, panic, and
paranoia |

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Mental Health:
Effects on Psychiatric
Treatment |
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None reported |

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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |

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Dental Health:
Effects on Dental Treatment |
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No effects or complications reported |

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Patient
Information |
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Take prescribed dose with food. Maintain adequate hydration (2-3 L/day of
fluids unless instructed to restrict fluid intake). Avoid antacid use. May cause
dizziness; avoid driving or engaging in tasks that require alertness until
response to drug is known. Small frequent meals, frequent mouth care, sucking
lozenges, or chewing gum may reduce nausea or vomiting. Report skin rash,
itching, redness, or swelling; pain, inflammation, or rupture of tendon; pain or
burning on urination; or persistent diarrhea or vomiting. Breast-feeding
precautions: Do not breast-feed. |

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Nursing
Implications |
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Hold antacids for 3-4 hours after giving |

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Dosage Forms |
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Capsule: 250 mg, 500 mg |

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References |
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Sisca TS, Heel RC, and Romankiewicz JA,
"Cinoxacin: A Review of Its Pharmacological Properties and Therapeutic Efficacy in the Treatment of Urinary Tract Infections,"
Drugs, 1983, 25(6):544-69.
Stricker BH, Slagboom G, Demaeseneer R, et al,
"Anaphylactic Reactions to Cinoxacin," BMJ, 1988, 297(6661):1434-5.
Szarfman A, Chen M, and Blum MD,
"More on Fluoroquinolone Antibiotics and Tendon Rupture," N Engl J Med,
1995, 332(3):193. |

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