Travel Health Guide: Ecuador — Altitude, Amazon Malaria & Galápagos Prep
Physician-written health guide for Ecuador travelers. Quito altitude tips, Amazon malaria prevention, Galápagos prep, vaccines, and what to pack.
Travel Health Guide: Ecuador — Altitude, Amazon Malaria & Galápagos Prep
Ecuador packs four very different health environments into one country: high-altitude Quito at 9,350 feet, the Amazon basin with active malaria and yellow fever transmission, the Pacific coast with dengue risk, and the Galápagos Islands. Travelers spending time in Quito or hiking near Cotopaxi should consider acetazolamide for altitude sickness. Those visiting Amazon provinces east of the Andes need malaria prophylaxis and yellow fever vaccination. Every traveler should pack treatment for traveler's diarrhea, which affects roughly 30 to 50 percent of US visitors to Ecuador, according to CDC estimates. Recommended vaccines include hepatitis A, typhoid, and your routine immunizations. As an ER physician, I recommend starting your prep at least four to six weeks before departure. This guide breaks down what you actually need, by region.
Quick Facts: Ecuador Health Snapshot
Overview: Why Ecuador Is a Four-in-One Health Destination
Ecuador is small on the map and large on the medical-decision tree. In a single two-week itinerary, a traveler can move between sea level on the coast, 9,350 feet in Quito, jungle lowlands in the Amazon, and the Galápagos. Each environment has its own set of risks and its own prevention strategy.
In my experience treating travelers, the people who get into trouble in Ecuador are the ones who plan for one piece of the trip and forget the others. Someone preparing for Galápagos thinks "tropical island, easy" and skips altitude prep, then spends their first 48 hours in Quito with a pounding headache and nausea. Someone planning a jungle lodge in the Amazon forgets that the airport hub is Quito, and arrives without acetazolamide. The fix is a region-by-region plan, which is what this guide gives you.
Altitude Sickness in Quito and the Andes
Quito sits at approximately 9,350 feet (2,850 meters), making it the second-highest capital city in the world after La Paz. Acute mountain sickness (AMS) affects an estimated 25 percent of travelers arriving directly from sea level to elevations above 8,000 feet, according to the Wilderness Medical Society. Symptoms typically appear within 6 to 12 hours of arrival and include headache, nausea, fatigue, dizziness, and disturbed sleep.
If your itinerary includes day trips to Cotopaxi (with summit elevation above 19,000 feet), the Quilotoa Loop, or the Avenue of the Volcanoes, your altitude exposure climbs quickly. Even non-summit hikes around Cotopaxi National Park reach 13,000 feet or higher.
Preventing Altitude Sickness in Ecuador
Acetazolamide (Diamox) remains the most evidence-supported medication for AMS prevention. The standard dose is 125 mg twice daily, starting one to two days before ascending and continuing for two days at your highest elevation. Acetazolamide stimulates faster breathing, which speeds up your body's acclimatization.
In my clinical experience, travelers who pre-medicate with acetazolamide before flying into Quito have far fewer altitude complaints than those who plan to "see how they feel." Once symptoms start, treatment is harder than prevention.
Other strategies that help: arrive hydrated, avoid alcohol the first 24 to 48 hours, take it easy on day one, and skip a strenuous hike or summit attempt for at least the first 48 hours after arrival.
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Malaria Risk in Ecuador: Amazon and Coastal Regions
Malaria transmission in Ecuador is concentrated below 1,500 meters elevation, primarily in the Amazon basin (Morona-Santiago, Napo, Orellana, Pastaza, Sucumbíos, Zamora-Chinchipe) and parts of the Pacific coast (Esmeraldas, parts of Manabí and Guayas). The CDC reports that Plasmodium vivax is the dominant species, with P. falciparum also circulating in lower numbers.
Quito, Cuenca, the Galápagos, and the central Sierra are not malaria-risk areas. If your trip stays at altitude or on the islands, you do not need antimalarials.
Recommended Antimalarials for Ecuador
For travelers visiting Amazon provinces or low-elevation coastal areas:
- Atovaquone-proguanil (Malarone): Daily dosing, start 1 to 2 days before entering a malaria area, continue 7 days after leaving. Generally well-tolerated.
- Doxycycline: Daily dosing, start 1 to 2 days before, continue 4 weeks after leaving. Less expensive, but requires sun precautions due to photosensitivity.
- Mefloquine: Weekly dosing, start 2 weeks before. Less commonly prescribed in 2026 due to neuropsychiatric side effects.
Choice depends on trip length, side effect profile, and individual medical history. A physician can match you to the right one.
Compare Malarone vs Doxycycline. See our physician-written breakdown of which one is right for your trip.
Bite Prevention Is Half the Battle
Prophylaxis is not 100 percent effective. Use 25 to 50 percent DEET on exposed skin, treat clothing with permethrin, sleep under bed nets when staying in jungle lodges, and wear long sleeves and pants at dawn and dusk when Anopheles mosquitoes are most active.
Yellow Fever Vaccine: When You Need It for Ecuador
The CDC recommends yellow fever vaccination for travelers aged 9 months and older going to provinces east of the Andes mountains: Morona-Santiago, Napo, Orellana, Pastaza, Sucumbíos, and Zamora-Chinchipe. Vaccination is also recommended for travel to certain west-of-Andes provinces under 2,300 meters (Esmeraldas, parts of Pichincha, Imbabura, and others, depending on current advisories).
Yellow fever vaccination is not required or recommended for travel limited to Quito, Guayaquil, Cuenca, or the Galápagos Islands.
A few important notes:
- Yellow fever vaccine must be given at least 10 days before exposure to be effective. It is also a single-dose lifetime vaccine for most adults.
- Some travelers entering Ecuador from another yellow-fever-endemic country (such as Peru or Colombia) may be asked for proof of vaccination at the border. Carry your International Certificate of Vaccination card.
- The vaccine is contraindicated for infants under 9 months, pregnant or breastfeeding individuals (in most cases), and people with severely weakened immune systems. Talk to a physician about exemptions if applicable.
Traveler's Diarrhea: The Most Common Health Issue in Ecuador
Traveler's diarrhea is the most common medical issue I see in returning travelers from Ecuador. Studies estimate that 30 to 50 percent of US travelers to Latin America experience at least one episode during a two-week trip. Causes are usually bacterial (most often E. coli), occasionally viral or parasitic.
Treatment to Pack Before You Go
- Azithromycin: First-line antibiotic for traveler's diarrhea in Latin America. Standard regimen is a single 1,000 mg dose or 500 mg daily for three days.
- Loperamide (Imodium): Over-the-counter symptom control. Useful for plane rides and bus rides, but do not use it alone if you have a fever above 102°F or bloody stool.
- Oral rehydration salts (ORS): Replace lost electrolytes. Cheap, light, lifesaving in severe cases.
Get the antibiotic prescription before you leave. Trying to find azithromycin in a Quito or Coca pharmacy while you are sick is not the experience you want.
Food and Water Safety in Ecuador
Tap water is not safe to drink anywhere in Ecuador for tourists, including in Quito and Guayaquil. Drink bottled or properly filtered water, including for ice cubes and brushing teeth. Stick to peeled fruit, fully cooked food, and pasteurized dairy. Street food can be safe if it is hot and freshly cooked, but avoid raw vegetables and salads from street vendors.
Galápagos Health Considerations
The Galápagos Islands have minimal infectious disease risk compared to mainland Ecuador. Malaria is not present. Yellow fever vaccination is not required. Most health issues travelers encounter are environmental:
- Sunburn and dehydration: UV index regularly hits 11 or higher. Pack SPF 50, a wide-brimmed hat, and a refillable water bottle.
- Motion sickness: Most Galápagos itineraries involve daily boat transfers between islands. Scopolamine patches are the most reliable prescription option for multi-day sea travel. Dramamine, meclizine, and ginger are non-prescription alternatives.
- Heat illness: The equatorial sun and the cold Humboldt Current produce a deceptive climate. People underestimate how quickly they overheat on lava-rock hikes.
- Minor injuries: Reef cuts, snorkel fin blisters, and slips on wet boat decks are routine.
Get a scopolamine patch prescription online. Avoid days of seasickness on island-hopping itineraries. Order a scopolamine patch
A small first-aid kit with antiseptic, bandages, motion sickness meds, and your usual prescription medications covers 90 percent of what you will need on a Galápagos cruise.
Vaccines & Immunizations for Ecuador
Recommended for Most Travelers
- Hepatitis A: Spread through contaminated food and water. Recommended for all travelers to Ecuador.
- Typhoid: Spread through contaminated food and water. Particularly important if you are visiting smaller cities, eating outside major hotels, or staying with friends or family.
- Hepatitis B: Recommended if you may have new sexual contacts, get a tattoo or piercing, or receive medical or dental care during your trip.
- Rabies (pre-exposure): Recommended for long-term travelers, jungle hikers, cavers, and people working with animals. Rabies is present in Ecuadorian wildlife and stray dogs.
Recommended for Specific Itineraries
- Yellow fever: Required for entry into the Amazon provinces (see section above).
Routine Vaccines to Verify
- MMR (measles, mumps, rubella)
- Tdap (tetanus, diphtheria, pertussis)
- Polio
- COVID-19 (current per CDC schedule)
- Influenza (seasonal)
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Dengue and Zika: What to Watch For
Dengue is present in coastal Ecuador and the Amazon, with periodic outbreaks reported by Ecuador's Ministry of Public Health. There is no specific medication that prevents dengue; bite prevention is the only strategy. Use DEET, wear long sleeves at dawn and dusk, and treat clothing with permethrin.
Zika risk is also present in lowland regions. Pregnant travelers, or those trying to conceive, should consult a physician before traveling to lowland Ecuador. The CDC currently recommends pregnant travelers avoid areas with Zika transmission whenever possible.
Travel Insurance for Ecuador
Travel insurance is strongly recommended for Ecuador. Medical evacuation from the Galápagos to Guayaquil, or from a remote Amazon lodge to Quito, can run $20,000 to $80,000. Standard travelers' policies often exclude high-altitude trekking and adventure activities, so read the fine print before you buy.
A good policy for Ecuador covers:
- Emergency medical care and hospitalization
- Medical evacuation and repatriation
- Trip interruption for medical reasons
- Adventure activities (if you plan to climb, dive, or trek)
- Pre-existing condition waivers if relevant
Get travel insurance through Wandr. Compare policies and get covered before you go. Explore travel insurance
Ecuador Travel Health Packing Checklist
Prescription medications:
- Acetazolamide (Diamox) for altitude (Quito, Andes, Cotopaxi)
- Antimalarial (Malarone or doxycycline) for Amazon or lowland coastal travel
- Azithromycin for traveler's diarrhea treatment
- Scopolamine patch for Galápagos cruises and boat travel
Over-the-counter:
- Loperamide (Imodium) for diarrhea symptom control
- Oral rehydration salts
- Ibuprofen or acetaminophen
- Antihistamine (allergic reactions, mild bug bites)
- Antacid
Protection:
- DEET repellent (25 to 50 percent), critical for Amazon and coast
- Permethrin spray for clothing
- SPF 50 mineral sunscreen (UV is intense at altitude and on the equator)
- Wide-brimmed hat and UV-protective sunglasses
- SPF lip balm
First aid:
- Bandages and blister care (lots of walking on cobblestone in Quito and lava in Galápagos)
- Antiseptic wipes
- Hand sanitizer
Documentation:
- Yellow fever International Certificate of Vaccination (if visiting Amazon)
- Travel insurance policy with emergency contact number
- Copies of all prescriptions
- Physician contact info
Frequently Asked Questions: Ecuador Travel Health
Do I need malaria pills for Ecuador?
It depends on your itinerary. Malaria transmission in Ecuador is limited to areas below 1,500 meters in the Amazon basin and parts of the Pacific coast (Esmeraldas, parts of Manabí and Guayas). If your trip stays in Quito, Cuenca, the Galápagos, or the central Sierra, antimalarials are not needed. If you are visiting an Amazon lodge or lowland coastal areas, prophylaxis with Malarone or doxycycline is recommended.
Do I need a yellow fever vaccine for Ecuador?
Yellow fever vaccination is recommended by the CDC for travelers going to Ecuadorian provinces east of the Andes (Morona-Santiago, Napo, Orellana, Pastaza, Sucumbíos, Zamora-Chinchipe) and for select areas west of the Andes below 2,300 meters. It is not required or recommended for travel limited to Quito, Guayaquil, Cuenca, or the Galápagos. The vaccine must be given at least 10 days before exposure and is a single lifetime dose for most adults.
Will I get altitude sickness in Quito?
Possibly. Quito sits at 9,350 feet, and roughly 25 percent of travelers arriving from sea level develop acute mountain sickness within 6 to 12 hours. Symptoms include headache, nausea, fatigue, and disturbed sleep. Acetazolamide (Diamox), started 1 to 2 days before arrival, dramatically reduces both the chance and severity of symptoms.
Is the water safe to drink in Ecuador?
No. Tap water is not safe for tourists in any part of Ecuador, including major cities like Quito and Guayaquil. Drink bottled or properly filtered water, including water used for ice and brushing teeth. Outside of major hotels, also avoid raw salads and unpeeled fruit washed in tap water.
What vaccines do I need for the Galápagos?
The Galápagos itself has minimal infectious disease risk, so no special travel vaccines are required for the islands themselves. However, since most travelers transit through Quito or Guayaquil, the standard recommendations for mainland Ecuador apply: hepatitis A, typhoid, and routine immunizations. Yellow fever vaccine is not required for the Galápagos.
When should I start altitude sickness medication for Ecuador?
Start acetazolamide (Diamox) one to two days before arriving at altitude. The medication needs time to begin working before you ascend. Continue for two days at your highest elevation. Do not wait until you feel symptoms, since prevention is significantly more effective than treatment once AMS begins.
Do I need motion sickness medication for the Galápagos?
If your Galápagos itinerary includes a multi-day cruise or daily inter-island boat transfers, plan for motion sickness. Sea conditions vary widely. Scopolamine patches are the most reliable prescription option for multi-day exposure. Over-the-counter alternatives include dimenhydrinate (Dramamine), meclizine (Bonine), and ginger. Bring your choice with you, since pharmacy options on the islands are limited.
How do I treat traveler's diarrhea in Ecuador?
The first-line antibiotic is azithromycin, taken as a single 1,000 mg dose or 500 mg daily for three days. Pair it with oral rehydration salts and loperamide (Imodium) for symptom control. Pack the prescription before you leave. Seek medical attention if you develop a fever above 102°F, bloody stool, or symptoms lasting more than 72 hours.
Is dengue a risk in Ecuador?
Yes, in coastal Ecuador and the Amazon. There is no medication that prevents dengue, so bite prevention is the only strategy. Use DEET, wear long sleeves and pants at dawn and dusk, and treat clothing with permethrin. Pregnant travelers should be especially cautious due to the overlap with Zika risk in lowland regions.
How far in advance should I see a doctor before traveling to Ecuador?
At least four to six weeks before departure. Yellow fever vaccine requires a 10-day lead time before entering endemic regions, and some vaccines (such as hepatitis B) involve a multi-dose schedule that takes longer. Starting prep early gives you flexibility and avoids last-minute stress.
About the Author
This guide was written by Dr. Alec Freling, emergency medicine physician and founder of Wandr Health. Wandr Health is a physician-founded travel health platform that provides online consultations, prescription medications, vaccine booking, and travel insurance for US travelers.
Medical Disclaimer
This guide is intended for informational purposes and does not constitute medical advice. Travel health recommendations may change based on updated CDC and WHO advisories, disease outbreaks, and individual health factors. Consult a licensed physician before making decisions about medications, vaccines, or your personal health needs for travel. Check the CDC Travelers' Health website (cdc.gov/travel) and the WHO International Travel and Health guide for the most current recommendations.
Sources
- Centers for Disease Control and Prevention (CDC). Ecuador Travelers' Health Destination Page. Accessed May 2026.
- Wilderness Medical Society. "Wilderness Medical Society Practice Guidelines for the Prevention and Treatment of Acute Altitude Illness." Wilderness and Environmental Medicine, 2019.
- World Health Organization (WHO). "International Travel and Health: Ecuador." Accessed May 2026.
- CDC Yellow Book 2024. Chapter: Yellow Fever. Accessed May 2026.
- CDC Yellow Book 2024. Chapter: Malaria. Accessed May 2026.
- CDC Yellow Book 2024. Chapter: Altitude Illness. Accessed May 2026.
- DuPont HL. "Acute Infectious Diarrhea in Immunocompetent Adults." New England Journal of Medicine, 2014;370:1532-1540.
- Pan American Health Organization (PAHO). "Dengue Surveillance in the Americas: Ecuador." Accessed May 2026.
Last updated: May 1, 2026