Azithromax 500 Tab

Azithromax 500 Tab — Product Overview

What is Azithromax 500 Tab?

Azithromax 500 Tab is a 500 mg film-coated azithromycin tablet manufactured by Ziska Pharmaceuticals Limited, one of Bangladesh's established pharmaceutical manufacturers known for a broad anti-infective portfolio. Azithromax offers an alternative brand choice to physicians and patients seeking the same well-established azithromycin molecule, often at a competitive price point relative to other branded equivalents in the Bangladesh market.

Mechanism of Action

Azithromycin belongs to the azalide subclass of macrolide antibiotics. It binds the 50S ribosomal subunit of susceptible bacteria, blocking translocation during protein synthesis and arresting bacterial growth. Its unique chemical modification (a methylated nitrogen in the macrolide ring) provides excellent acid stability and an extended tissue half-life of approximately 68 hours, allowing sustained antibacterial activity well beyond the dosing period — a property shared across all azithromycin brands regardless of manufacturer.

Indications

Azithromax 500 Tab is indicated for community-acquired pneumonia of mild-to-moderate severity, uncomplicated genital chlamydial infections (single 1g dose), acute bacterial sinusitis, pharyngitis/tonsillitis in penicillin-allergic patients, skin and soft tissue infections, and typhoid fever as an alternative regimen. As a generic-equivalent brand to other azithromycin products on the market, its clinical use mirrors that of other 500mg azithromycin tablets, with brand selection often guided by physician preference, patient cost considerations, or local availability.

Pharmacokinetics

Following oral administration, Azithromax 500 Tab reaches peak plasma concentration within 2-3 hours, with an oral bioavailability of approximately 37%. The drug distributes extensively into tissues (volume of distribution ~31 L/kg), achieving therapeutic concentrations in lung, skin, and genital tissue. Protein binding ranges from 7-51% depending on plasma concentration. Elimination is primarily hepatobiliary, with less than 6% excreted renally, meaning no dosage adjustment is needed in mild-to-moderate renal impairment.

Special Considerations for Diabetic Patients

Diabetic patients prescribed Azithromax 500 Tab should be aware that: azithromycin does not directly alter blood glucose levels, but the underlying infection being treated can transiently affect glycaemic control, particularly in insulin-dependent patients; gastrointestinal side effects (nausea, diarrhoea) may reduce oral intake and require closer glucose monitoring during the treatment course; and diabetic patients with cardiac autonomic neuropathy should be aware of azithromycin's QT-prolongation potential, particularly relevant at the higher 500mg dose strength, and should discuss any history of cardiac arrhythmia with their physician before starting treatment.

Adverse Effects and Safety

Commonly reported effects (1-10%) include nausea, diarrhoea, abdominal discomfort, and headache, generally mild and self-limiting. Less common effects include QTc interval prolongation (caution advised in patients with cardiac conduction abnormalities or electrolyte imbalances), rare hepatic enzyme elevation or cholestatic jaundice (typically reversible), and hypersensitivity reactions ranging from mild rash to rare anaphylaxis. As with all azithromycin-containing products, the FDA has issued cardiovascular safety communications relevant to patients with pre-existing cardiac risk factors.

Dosage and Administration

For community-acquired pneumonia: 500 mg once daily for 3 days, or 500 mg Day 1 followed by 250 mg daily for 4 more days. For chlamydia: single 1g (two-tablet) dose. May be taken with or without food. Swallow tablets whole with water; avoid crushing or chewing. Complete the full prescribed course even if symptoms improve early, to ensure complete bacterial clearance and reduce resistance development.

Contraindications and Drug Interactions

Contraindicated in patients with hypersensitivity to azithromycin or other macrolide/ketolide antibiotics, and those with a history of azithromycin-associated cholestatic jaundice. Use cautiously in myasthenia gravis, severe hepatic impairment, and significant cardiac conduction disorders. Key interactions: aluminium/magnesium antacids reduce peak concentration (separate by 1-2 hours); warfarin requires INR monitoring; digoxin levels may increase; ergot derivatives are contraindicated; concurrent QT-prolonging medications should be used cautiously.

Storage Instructions

Store Azithromax 500 Tablets below 30°C in a dry place, protected from light and moisture. Keep in original blister packaging until use. Keep out of reach of children. Do not use beyond the printed expiry date. Proper storage in Bangladesh's humid climate is important to preserve tablet integrity and potency.

Frequently Asked Questions

Medical Disclaimer: This information is for educational purposes only and does not constitute medical advice. Azithromax 500 Tab is a prescription antibiotic requiring physician authorisation. Self-medication with antibiotics is hazardous and promotes resistance. Always consult a qualified healthcare professional. DiabetesStore.com.bd is a licensed pharmacy retailer in Bangladesh.