SOZITHRA 500

SOZITHRA 500

Generic Name:
SOZITHRA 500
Therapeutic Category:
Antibacterial / Macrolide Antibiotic (Azalide subclass)
Mechanism of Action:
Primarily bacteriostatic action. Azithromycin binds reversibly to the 50S ribosomal subunit of susceptible micro-organisms. This action blocks transpeptidation and translocation, effectively inhibiting bacterial protein synthesis and stopping cellular growth.

Indications

Dosage & Administration

Contraindications & Precautions

Potential Side Effects

Indications (Therapeutic Uses)

Azithromycin 500 mg is an extended-spectrum antibiotic indicated for the treatment of mild-to-moderate infections caused by susceptible strains of specific micro-organisms:

  • Lower Respiratory Tract Infections: Acute bacterial exacerbations of chronic obstructive pulmonary disease (COPD) and mild community-acquired pneumonia (CAP).
  • Upper Respiratory Tract Infections: Acute bacterial sinusitis, streptococcal pharyngitis (strep throat), and tonsillitis as an alternative first-line therapy in penicillin-allergic patients.
  • Skin and Skin Structure Infections: Uncomplicated infections of the skin tissue caused by Staphylococcus aureus, Streptococcus pyogenes, or Streptococcus agalactiae.
  • Sexually Transmitted Infections (STIs): Non-gonococcal urethritis and cervicitis caused by Chlamydia trachomatis.
  • Typhoid Fever: Used in specific clinical settings for uncomplicated enteric fever caused by multi-drug resistant strains of Salmonella typhi.

Dosage & Administration

Website Note: Dosage frequency and duration of treatment must be explicitly directed by a registered medical practitioner. Finishing the exact therapeutic course prescribed is vital to mitigate the risk of developing antibiotic resistance.

  • Standard Adult Dose (Respiratory & Skin Infections): Typically administered as 500 mg orally once daily for 3 consecutive days (totaling 1.5 g). Alternatively, a 5-day regimen may be used: 500 mg as a single dose on Day 1, followed by 250 mg once daily on Days 2 through 5.
  • Standard Adult Dose (Chlamydia Urethritis/Cervicitis): Administered as a single oral dose of 1,000 mg (two 500 mg tablets taken together).
  • Administration Method: Tablets must be swallowed whole with a full glass of water. They should not be crushed, broken, or chewed.
  • Timing: Can be taken with or without food. However, taking the tablet alongside a meal can significantly reduce mild, localized gastrointestinal side effects.

Contraindications & Precautions

  • Absolute Contraindications: Do not use in individuals with a verified history of hypersensitivity to azithromycin, erythromycin, any other macrolide or ketolide antibiotic, or any inactive ingredients in the tablet formulation. Completely contraindicated in patients with a history of cholestatic jaundice or hepatic dysfunction associated with prior azithromycin use.
  • Cardiovascular Warning (QT Prolongation): Macrolide antibiotics can prolong the cardiac QT interval, increasing the risk of developing serious ventricular arrhythmias (such as Torsades de Pointes). Exercise extreme caution in patients with known proarrhythmic conditions, congenital long QT syndrome, uncorrected hypokalemia or hypomagnesemia, or those taking concurrent antiarrhythmic medications.
  • Hepatotoxicity Risk: Abnormal liver function, hepatitis, cholestatic jaundice, hepatic necrosis, and hepatic failure—some resulting in fatalities—have been reported. Discontinue therapy immediately if signs of progressive liver damage develop (e.g., jaundice, dark urine, upper abdominal pain, unexplained fatigue).
  • Clostridium difficile-Associated Diarrhea (CDAD): Treatment disrupts the normal microbial flora of the colon, potentially facilitating the overgrowth of C. difficile. Symptoms can range from mild watery diarrhea to life-threatening pseudomembranous colitis. Discontinue treatment immediately if severe or bloody diarrhea accompanied by intense abdominal cramping occurs.
  • Myasthenia Gravis Exacerbation: Exacerbations of symptoms and new onset of myasthenic syndrome have been reported in patients receiving azithromycin therapy.

Potential Side Effects

  • Common / Mild: Nausea, vomiting, diarrhea, abdominal localized cramping, dyspepsia (heartburn), flatulence, transient dizziness, headache, altered sense of taste, and mild skin rash.
  • Less Common / Severe: Anaphylactic shock, angioedema, severe cutaneous adverse reactions (such as Stevens-Johnson syndrome or toxic epidermal necrolysis), severe drug-induced hepatitis, acute renal failure, interstitial nephritis, and hearing impairment/tinnitus (usually reversible upon discontinuation of high-dose therapy).
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