Azithromycin - Zithromax 250mg and 500mg Tablets, Box of 30

Zithromax - Azithromycin 250mg and 500mg Tablets

Zithromax contains azithromycin, a macrolide antibiotic supplied as 250 mg or 500 mg tablets in packs of 30. It is prescribed for bacterial infections of the respiratory tract, including bronchitis and pneumonia, for sinusitis, throat and skin infections, and for chlamydia. It does not treat viruses, so it is not used for colds or flu. Where a penicillin fits the infection better, a doctor may prescribe amoxicillin instead.

• Two strengths - Zithromax 250 mg and Zithromax 500 mg, 30 tablets per pack
• Macrolide antibiotic - a short course keeps working after the last tablet
• Manufactured as a generic - marketed under the Zithromax brand name
• Ships internationally from the supplier warehouse

Variant Comparison

Both packs hold the same medicine, azithromycin, and differ only in tablet strength. Which you order depends on the schedule your prescriber sets: 500 mg once daily for three days, or 500 mg on the first day then 250 mg on days two to five. The table below compares them.

Azithromycin has a half-life of about 68 hours, so the total dose across the course matters more than the number of tablets. A three-day course needs only three Zithromax 500 mg tablets; the five-day course opens with one Zithromax 500 mg tablet and continues with Zithromax 250 mg on days two to five. A pack of 30 covers a full course several times over. For the same respiratory or genital pathogens, doxycycline is a common alternative.

How Azithromycin Works

Azithromycin is a macrolide: it binds to the 50S part of the bacterial ribosome and blocks protein synthesis, so susceptible bacteria cannot grow and the immune system clears the infection. It is active against many organisms behind chest, sinus, throat and skin infections, and against chlamydia. It also works against bacteria that produce beta-lactamase enzymes, one reason it is chosen when amoxicillin and clavulanic acid is unsuitable. Tissue levels stay high for days after the last dose, so a short course is enough.

Dosage & Administration

Standard adult regimens are 500 mg once daily for three days, or 500 mg on the first day then 250 mg once daily on days two to five. Tablets may be taken with or without food, at the same time daily. Antacids with aluminium or magnesium should be taken two hours apart, as they reduce absorption. If a dose is missed, take it as soon as you remember unless the next dose is close, and never double up. Follow your physician's instructions and finish the course even if symptoms improve.

This product may require a prescription in your country. Information provided is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before use.