Gracevit Sitafloxacin Tablets

1. Indications and Usage
Respiratory Tract Infections:
Pharyngitis, tonsillitis (including peritonsillitis and peritonsillar abscess), acute bronchitis, infectious pneumonia, and secondary infections in chronic respiratory diseases.
Urinary Tract Infections:
Cystitis, pyelonephritis, urethritis, cervicitis.
Otorhinolaryngologic & Dental Infections:
Otitis media, sinusitis, periodontitis, pericoronitis, and osteomyelitis of the jaw.
Specific Pathogens:
Indicated for infections caused by Staphylococcus aureus, Streptococcus pneumoniae, Enterococcus faecalis, Haemophilus influenzae, Legionella pneumophila, Mycoplasma pneumoniae, and Chlamydia pneumoniae .
2. Dosage and Administration
Route of Administration:
For Oral Use ONLY.
Recommended Dosage:
Standard Adult Dose: One tablet (50 mg) twice daily, or two tablets (100 mg) once daily.
High Dose: In cases where clinical efficacy is insufficient, the dose may be increased to two tablets (100 mg) twice daily.
Pediatric Use: Contraindicated in patients under 18 years of age .
Administration Instructions:
The tablet should be swallowed whole with water. It can be taken with or without food.
3. Mechanism of Action
Dual Enzyme Inhibition:
Sitafloxacin targets two essential bacterial enzymes: DNA gyrase and topoisomerase IV.
Bactericidal Activity:
By inhibiting these enzymes, it prevents bacterial DNA replication and repair, exerting a potent bactericidal effect.
Resistance Profile:
It exhibits strong inhibitory activity against bacterial enzymes derived from quinolone-resistant strains (e.g., gyrA and parC mutants), showing superior efficacy compared to other quinolones against resistant pathogens .
4. Safety and Warnings
Hypersensitivity:
Discontinue immediately if signs of shock or anaphylaxis (difficulty breathing, skin rash) occur.
QT Interval Prolongation:
May prolong the QT interval. Use with caution in patients with cardiac conditions, electrolyte imbalances (hypokalemia), or those taking other QT-prolonging drugs .
Tendon Disorders:
Similar to other quinolones, it may cause tendonitis or tendon rupture. Risk is higher in elderly patients and those taking corticosteroids.
Glucose Metabolism:
Hypoglycemia (sometimes leading to coma) has been reported, particularly in diabetic patients, the elderly, or those with renal impairment. Monitor blood glucose levels .
Pregnancy and Lactation:
Contraindicated in pregnant women and women who may be pregnant. Not recommended for nursing mothers .
5. Adverse Reactions
Gastrointestinal Disorders:
Diarrhea, loose stools, nausea, abdominal pain, and vomiting.
Hepatic Disorders:
Elevated liver enzymes (ALT/GPT, AST/GOT) and LDH.
Nervous System Disorders:
Headache, dizziness, insomnia, and rarely, confusion or hallucinations .
Dermatological Disorders:
Rash, pruritus, and photosensitivity reactions.
6. Drug Interactions
Antacids and Metal Ions:
Co-administration with aluminum/magnesium antacids, calcium supplements, or iron preparations may form chelates and reduce absorption. Administer Sitafloxacin at least 2 hours before or after these agents .
NSAIDs:
Concomitant use with phenylacetic or propionic acid NSAIDs (e.g., Ketoprofen) may inhibit GABA-A receptor binding and increase the risk of convulsions .
Corticosteroids:
Concomitant use may increase the risk of tendon injury .
7. Pharmaceutical Information
Chemical Composition:
Active Ingredient: Sitafloxacin.
Chemical Formula: C19H18ClF2N3O3·1½H2O.
Appearance: White to yellowish-white film-coated tablets .
Storage:
Store at room temperature in a dry place, protected from light .