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Azithromycini.com Clinical Drug Reference
Macrolide Antibiotic Guide

Azithromycin Clinical Resource & Calculator

Essential pharmacological information, pediatric & adult dosing guidance, drug interaction screening, and administration safety protocols for healthcare professionals and patients.

Class Azalide / Macrolide
Half-Life 68 Hours (Extended)
Action 50S Ribosomal Inhibitor
Rx Status Prescription Required
Pharmacodynamics & Spectrum

How Azithromycin Works

Azithromycin is a subclass of macrolide antibiotics known as an azalide. It prevents bacterial growth by binding to the 50S ribosomal subunit of susceptible microorganisms, thereby interfering with microbial protein synthesis (bacteriostatic activity).

Gram-Negative Activity: Haemophilus influenzae, Moraxella catarrhalis, Neisseria gonorrhoeae, Legionella pneumophila.
Atypical Bacteria: Mycoplasma pneumoniae, Chlamydia trachomatis, Ureaplasma urealyticum.

Primary Clinical Indications

Community Pneumonia Mild to moderate CAP caused by Mycoplasma or Strep. pneumoniae.
Acute Sinusitis & Throat Bacterial pharyngitis/tonsillitis and acute bacterial sinusitis.
Otitis Media Acute middle ear infections in pediatric patients (≥6 months).
Chlamydia & Urethritis Uncomplicated genital infections due to Chlamydia trachomatis.
Clinical Tool

Azithromycin Dosage Calculator

Estimate standardized pediatric oral suspension volume or adult Z-Pak tablet dosing regimens.

ESTIMATED DOSAGE RESULT rx-verification required
Daily Dose (mg) 150 mg Once daily for 3 days
Liquid Volume (mL) 3.75 mL per dose (using calibrated syringe)
Schedule Breakdown:

Give 150 mg (3.75 mL of 200mg/5mL) once daily on Days 1, 2, and 3. Total cumulative dose: 450 mg.

Maximum pediatric single daily dose should not exceed 500 mg. Dosing based on body weight must be adjusted by a pediatrician.
Formulations & Strengths

Available Preparations

250

250 mg Film Tablet

Standard Z-Pak component (6 tablets total pack).

  • • Typical D1: 500mg (2 tabs)
  • • Days 2-5: 250mg (1 tab)
  • • Take with or without food
500

500 mg Tablet

TRI-PAK or acute single/3-day regimen strength.

  • • 500 mg once daily x 3 days
  • • Or 1000 mg single dose (STD)
  • • Avoid aluminum antacids
200

200 mg / 5 mL Liquid

Pediatric oral reconstituted suspension.

  • • Shake well before use
  • • Store at room temp or fridge
  • • Discard unused after 10 days
100

100 mg / 5 mL Liquid

Low-concentration pediatric oral suspension.

  • • Suited for infants/toddlers
  • • Calibrated syringe required
  • • Cherry or banana flavor
Safety Screening

Drug Interaction Checker

Select concurrent medications to evaluate potential interaction warnings with Azithromycin.

CLICK TO SELECT CONCURRENT MEDICATIONS:
EVALUATION NOTES:
Select one or more medications above to review interaction guidance.
Adverse Effects

Side Effect Profile Matrix

Common (1% - 10%) Mild/Transient
  • Diarrhea / Loose stools
  • Nausea & Abdominal cramps
  • Vomiting
  • Headache
Uncommon (<1%) Moderate
  • Dizziness & Fatigue
  • Mild Rash / Pruritus
  • Taste Alteration (Dysgeusia)
  • Flatulence / Dyspepsia
Serious / Black Box Immediate Care
  • QT Prolongation & Arrhythmia
  • C. difficile Colitis (Severe Diarrhea)
  • Hepatotoxicity / Elevated ALT
  • Anaphylaxis & SJS/TEN Rash
Frequently Asked Questions

Patient & Clinical Guidance