Azithromycin composition?

Azithromycin is an azalide macrolide antibiotic. If you mean the chemical composition:

- Active ingredient: azithromycin (the base molecule).
- Chemical formula (base): C38H72N2O12
- Approximate molecular weight: ~749 g/mol

If you mean the composition of a specific product (tablet, suspension, injection), the inactive ingredient list (excipients) varies by brand and dosage form. Examples of what you might see:

- Tablets: commonly include fillers and binders such as lactose or cellulose, disintegrants, magnesium stearate (lubricant), and colorants.
- Oral suspension: flavorings, sweeteners, stabilizers/preservatives, thickeners.
- Injection: a sterile solvent (often sterile water or saline) plus stabilizers or buffers as needed.

If you have a particular brand and dosage form (e.g., 250 mg tablet, Zithromax 500 mg tablet, or an IV form), I can pull up the exact ingredient list. Do you want the chemical composition or the excipients for a specific product? If yes, please specify the brand and dosage form.