Macrolide antibiotic
Azithromycin drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Azithromycin (Azithromycin) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 250mg, 500mg, 600mg, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Azithromycin
For Azithromycin, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Macrolide antibiotic agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Azithromycin reversibly binds the 50S ribosomal subunit of susceptible bacteria, inhibiting protein synthesis.
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Azithromycin. According to the prescribing information for Azithromycin, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 250mg, 500mg, 600mg.
Frequently asked questions
What's the most important Azithromycin interaction to know? ▾
For most Macrolide antibiotic medications, the highest-priority interaction is with nitrate medications used for chest pain — this combination is often a hard contraindication. After that, strong CYP3A4 inhibitors (some antifungals, macrolides) are the next concern at routine 250mg, 500mg, 600mg doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Azithromycin in ways that prescription drug-drug interaction databases miss. The pharmacist needs the complete picture — including supplements like St John's Wort, grapefruit-containing products and high-dose vitamins — to flag risks at 250mg, 500mg, 600mg.
Products containing Azithromycin
More on Azithromycin
- With alcoholAzithromycin and alcohol — is it safe to drink?
- With foodShould Azithromycin be taken with food?
- Side effectsAzithromycin side effects: common, rare and warning signs
- Dosage guideAzithromycin dosage guide: how much to take and when
- OnsetHow fast does Azithromycin start working?
- DurationHow long does Azithromycin last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.