moleculefinder

Azithromycin

C38H72N2O12749 g/mol Calculated

Also called Zithromax, Sumamed, Sunamed and ZMax.

The antibiotic sold as Zithromax and dispensed as the Z-Pak, used for chest, ear, throat and some sexually transmitted infections.

Sources and notes
  • The introductionfrom sourceMoleculeFinder curated
  • Other namesfrom sourceWikidataIts English label and aliases on Wikidata.
  • Formula and weightcomputedPubChem
  • 2D drawingcomputedPubChem structure, drawn by RDKit

Where you encounter it

Dispensed on prescription, not sold on a shelf. Azithromycin on the product labels we hold.

Medicines

ZithromaxAdded by the makerActive ingredient

Every product and list we hold

Sources and notes
  • The product labels and their strengthsfrom sourceDailyMed (FDA label)Each label lists the molecule as an ingredient, and an active ingredient at the strength shown.
  • How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
  • The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.

Explore its structure

Choose a part to light it up.

An ester closed into a ring: the C=O carbon and the oxygen beside it are both ring atoms. Like any ester, it can be split by water, which opens the ring.

From: standard chemistry.

Sources and notes
  • The drawingcomputedPubChem structure, drawn by RDKitThe page's one shipped drawing, with the chosen part lit in amber under it.
  • The partscomputedFound by ruleEach part is found by a chemical pattern, never picked by hand atom by atom; its words say where they come from.

Compare a related molecule

Amoxicillin

Azithromycin

Amoxicillin is a penicillin that blocks bacterial cell wall building, while azithromycin is a macrolide that stops protein synthesis and lingers for days.

Amoxicillin vs Azithromycin, side by side

Also compared

Sources and notes
  • The sentencefrom sourceMoleculeFinder comparison notesThe pair's answer line.
  • The two drawingscomputedPubChem structures, drawn by RDKitThe two drawings side by side.

Properties and sources

Calculated by PubChem

Molecular formula
C38H72N2O12
Molecular weight
749 g/mol
XLogP3octanol/water, log units
4
Polar surface areatopological
180 Ų
H-bond donors
5
H-bond acceptors
14
Rotatable bonds
7
Complexity
1150

Reported Hazard label (GHS), ECHA via PubChem

Danger Irritant pictogram (GHS07), Health hazard pictogram (GHS08) and Environmental pictogram (GHS09); hazard statements H317, H334, H372, H400, H410

Reported Licence

The US Food and Drug Administration licenses Azithromycin for human use (NDA 050710, authorized October 19, 1995). Drugs@FDA

Groups it belongs to

Category
Prescription medicine
Family
Antibiotics
Chemical groups
Alcohols, Esters, Ethers
Elements
Nitrogen
Hazard classes
Irritant, Health hazard, Environmental hazard, GHS Danger
SMILESCC[C@@H]1[C@@]([C@@H]([C@H](N(C[C@@H](C[C@@]([C@…180 characters

PubChem CID 447043 · Wikidata Q165399 · InChIKey MQTOSJVFKKJCRP-BICOPXKESA-N · Data refreshed

How MoleculeFinder sources and labels its data

Questions
What is Azithromycin?
The antibiotic sold as Zithromax and dispensed as the Z-Pak, used for chest, ear, throat and some sexually transmitted infections.
How toxic is Azithromycin?
Its GHS hazard label carries the signal word Danger and the hazard pictograms Irritant, Health hazard and Environmental. from source
What kind of molecule is Azithromycin?
Azithromycin has the formula C38H72N2O12 and a molecular weight of 749 g/mol. MoleculeFinder files it under antibiotics, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
What else is Azithromycin called?
Azithromycin is also called Sumamed, Sunamed, ZMax and Zithromax. from source
Who licenses Azithromycin as a medicine?
The US Food and Drug Administration licenses Azithromycin for human use (NDA 050710, authorized October 19, 1995). from source
Sources and notes
  • Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
  • Hazard labelfrom sourceECHA via PubChemThe label combines these classifications.
  • ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
  • Licencefrom sourceDrugs@FDARead 2026-10-21.
  • Data refreshedfrom sourceMoleculeFinder2026-11-09

Keep exploring

Compared side by side with azithromycinAmoxicillinC16H19N3O5SCompared side by side with azithromycinDoxycyclineC22H24N2O8Also an antibioticErythromycinC37H67NO13Also an antibioticClarithromycinC38H69NO13
Sources and notes
  • Compared side by sidefrom sourceMoleculeFinder comparison notesA molecule we compare it with on its own page.
  • The same kind of moleculefrom sourceMoleculeFinder curated groupsA structural neighbour in the same family or type group; the line names the group in its own words.
  • The drawingscomputedPubChem structures, drawn by RDKit