How to Get Azithromycin (Z-Pak) for Travel: A Physician's Guide

To get azithromycin for travel, you need a prescription from a licensed clinician. The fastest route is a telehealth travel health service like Wandr: you complete a short intake about your destination and history, a clinician reviews it, and the prescription is called in to your local pharmacy for pickup, usually within hours and without a clinic visit. Azithromycin (the generic in the familiar "Z-Pak") is the CDC's first-line standby antibiotic for traveler's diarrhea in South and Southeast Asia, where Campylobacter and fluoroquinolone resistance are common. The standard travel regimen is a single 1,000 mg dose, or 500 mg once daily for three days. As an ER physician, I treat azithromycin as a carry-it-just-in-case medication, not a daily preventive.

What Azithromycin Is and Why Travelers Carry It

Azithromycin is a macrolide antibiotic, the same drug sold under the brand name Zithromax and dispensed as the five-day "Z-Pak." For travelers, it serves one main job: a standby (self-treatment) antibiotic you carry in your kit and start only if you develop moderate to severe traveler's diarrhea on the road.

Traveler's diarrhea is the most common travel-related illness, affecting an estimated 30 to 70 percent of travelers depending on destination and season, according to the CDC Yellow Book 2024. Most cases are bacterial, and a single appropriate antibiotic dose can shorten a multi-day illness to a matter of hours. That is why I tell patients heading to higher-risk regions to leave with the medication already in hand. Finding a pharmacy that stocks the right antibiotic, in a country where you do not speak the language and the labeling is unfamiliar, is not where you want to be at 2 a.m.

Why Azithromycin Beats Ciprofloxacin in Asia

Azithromycin is the preferred standby antibiotic for South and Southeast Asia, and the reason is resistance. The CDC recommends azithromycin as empiric first-line treatment for traveler's diarrhea in these regions because Campylobacter, a leading cause of bacterial diarrhea there, is frequently resistant to fluoroquinolones like ciprofloxacin.

In plainer terms: the old standby, Cipro, increasingly fails against the bugs you are most likely to encounter in Thailand, Vietnam, India, and Nepal. Azithromycin still works against many of these fluoroquinolone-resistant strains. For Latin America and Africa, where the resistance picture differs, a fluoroquinolone may still be appropriate, which is exactly why this should be a clinician decision matched to your specific itinerary, not a one-size-fits-all pick. Azithromycin also has a second advantage: it is the antibiotic of choice in pregnancy and for children, populations where ciprofloxacin is generally avoided.

How to Get Azithromycin for Travel: Step by Step

Azithromycin is prescription-only in the United States, so there is no over-the-counter option. You have three realistic paths, and the right one usually comes down to time.

1. Online travel health service (fastest). Complete a digital intake about your destination, trip dates, and medical history. A licensed clinician reviews it and, if appropriate, calls the prescription in to your local pharmacy for pickup. No appointment, no waiting room. This is what Wandr does, often same-day.
2. Your primary care doctor. If you have a visit already scheduled and travel is weeks away, ask for a standby supply. The limitation is timing and availability of pre-travel appointments.
3. A traditional travel clinic. Thorough, but typically the most expensive and time-consuming option. A clinic consultation often runs over $100 before any medication, vaccine, or admin fees, and you have to book in advance and drive in.

Whichever route you choose, give yourself a buffer. You want the medication filled and packed before departure, not squeezed into the last 24 hours.

"I'd rather a traveler carry a single dose of the right antibiotic and never use it than scramble for an unfamiliar pharmacy abroad while they're sick. Standby treatment is about having the option ready before you need it." — Alec Freling, MD, Wandr Health

Azithromycin Dosing for Traveler's Diarrhea

The standard adult standby regimen is a single 1,000 mg dose of azithromycin, taken once if you develop moderate to severe traveler's diarrhea, per the CDC Yellow Book 2024. The main drawback of the single large dose is nausea, so the CDC notes you can split it into two 500 mg doses on the same day to make it easier to tolerate. An alternative regimen is 500 mg once daily for three days.

A few clinical points I always cover with patients:

• Pair it with loperamide (Imodium) for faster relief. Combining the antibiotic with an anti-motility agent shortens symptom duration in most travelers. Skip loperamide if you have a high fever or bloody stools.
• Stop when you are better. Standby treatment is not a fixed five-day course. If a single dose resolves your symptoms within 24 hours, you are done.
• Hydration comes first. Oral rehydration solution matters more than any antibiotic in mild cases. Many mild bouts resolve on their own without antibiotics at all.
• Pediatric and pregnancy dosing differ. Weight-based dosing applies for children, and azithromycin is the preferred agent in pregnancy, but both should be dosed by a clinician.

Carry the medication in its labeled pharmacy bottle, and keep a copy of your prescription, especially for longer or multi-country trips.

Azithromycin vs Ciprofloxacin at a Glance

For a deeper comparison, see our full guide on Ciprofloxacin vs Azithromycin for Traveler's Diarrhea.

Safety, Side Effects, and Who Should Be Cautious

Azithromycin is well tolerated for most travelers, but it is not for everyone. The most common side effect is gastrointestinal upset, primarily nausea, which is more noticeable with the single 1,000 mg dose.

The more important safety signal is cardiac. Azithromycin can cause QT prolongation, a change in the heart's electrical cycle that, in rare cases, leads to dangerous arrhythmias, according to the FDA azithromycin labeling. The risk is higher in people with a known QT abnormality, certain heart rhythm disorders, low potassium or magnesium, or who take other QT-prolonging medications. If that describes you, tell your clinician, because the standby antibiotic choice may change.

Mention any history of liver disease, prior reaction to macrolide antibiotics (azithromycin, erythromycin, clarithromycin), or current medications during your intake. This is precisely the information a travel health clinician reviews before approving a prescription, and it is why a five-minute history matters even for a "simple" antibiotic.

When Antibiotics Are Not the Answer

Most traveler's diarrhea is mild and self-limited, and antibiotics are reserved for moderate to severe illness. Start your standby azithromycin if you have diarrhea severe enough to disrupt your itinerary, or symptoms accompanied by fever or blood in the stool.

Seek in-person medical care rather than self-treating if you have a high fever, bloody diarrhea that is worsening, signs of dehydration you cannot keep up with, or symptoms that do not improve within 24 to 48 hours of taking the antibiotic. Persistent diarrhea lasting more than two weeks can point to a parasitic cause that azithromycin does not cover and needs a different evaluation. The goal of a standby antibiotic is to handle the common bacterial case quickly, not to replace medical judgment when something looks more serious.

Pack It With the Rest of Your Travel Kit

A standby antibiotic is one piece of a complete travel health kit. For most higher-risk destinations, I recommend pairing azithromycin with oral rehydration salts, loperamide, and any destination-specific medications such as antimalarials or altitude prevention. Wandr can handle the whole list in one intake: our clinicians review your trip and call in the prescriptions you need to your local pharmacy for pickup, and you can book any required travel vaccines at a partner pharmacy in the same place.

Before you go, run through our Pre-Trip Health Checklist so nothing gets left off, and see the full Traveler's Diarrhea: Complete Guide for prevention strategies that keep you from needing the antibiotic in the first place.

Ready for your trip? Skip the clinic waiting room and the $100-plus consultation. Start your free pre-trip health check with Wandr and get the standby medications you need called in to a pharmacy near you, often the same day.

Frequently Asked Questions

Is azithromycin the same as a Z-Pak? Yes. Azithromycin is the generic drug, and the Z-Pak is a common five-day branded packaging of it. For travel, clinicians usually prescribe a shorter standby regimen rather than the standard five-day pack, but it is the same active medication.

Do I need a prescription to get azithromycin for travel? Yes. Azithromycin is prescription-only in the United States and is not sold over the counter. A licensed clinician must review your history before it can be called in to your pharmacy, which a telehealth travel service can often do the same day.

What is the azithromycin dose for traveler's diarrhea? The standard adult standby dose is 1,000 mg taken once, or 500 mg once daily for three days, per the CDC. To reduce nausea, the single dose can be split into two 500 mg doses on the same day. Always follow your clinician's specific instructions.

Why is azithromycin recommended over Cipro for Asia? Campylobacter, a major cause of traveler's diarrhea in South and Southeast Asia, is frequently resistant to fluoroquinolones like ciprofloxacin. The CDC recommends azithromycin as first-line empiric treatment in these regions because it remains effective against many resistant strains.

Can I take azithromycin while pregnant or give it to my child? Azithromycin is generally the preferred antibiotic for traveler's diarrhea in pregnancy and in children, unlike ciprofloxacin. However, dosing must be set by a clinician, and you should always disclose pregnancy or your child's weight during the intake.

How far in advance should I get my standby antibiotic? Get it filled and packed before departure, ideally one to two weeks out. Through an online travel health service the prescription can be called in to your pharmacy the same day, but you want it in your kit and not a last-minute errand on travel day.

Can I take azithromycin and loperamide together? Yes, for most travelers, combining azithromycin with loperamide (Imodium) shortens the duration of traveler's diarrhea. Avoid loperamide if you have a high fever or bloody stools, and ask your clinician if you are unsure.

Medical disclaimer: This article is for general educational purposes and is not a substitute for personalized medical advice. Azithromycin is a prescription medication with possible side effects and drug interactions. Always consult a licensed clinician about whether a standby antibiotic is appropriate for you and your destination.

Sources

• CDC Yellow Book 2024, Travelers' Diarrhea: https://www.cdc.gov/yellow-book/hcp/preparing-international-travelers/travelers-diarrhea.html
• CDC Yellow Book 2024 (archived edition), Travelers' Diarrhea: https://wwwnc.cdc.gov/travel/yellowbook/2024/preparing/travelers-diarrhea
• FDA Zithromax (azithromycin) Prescribing Information: https://www.accessdata.fda.gov/drugsatfda_docs/label/2021/050670s036,050710s051,050711s050,050784s037lbl.pdf
• Azithromycin, StatPearls (NCBI Bookshelf): https://www.ncbi.nlm.nih.gov/books/NBK557766/