Travel Medicine · Thailand · Destination
Many city and island trips do not need malaria pills, but some border provinces do. CDC recommends prevention in provinces bordering Myanmar, Cambodia (except Buri Ram) and Malaysia, particularly forest and forest-fringe areas. Bangkok, Chiang Mai, Chiang Rai, Phuket, Koh Samui and Koh Phangan have rare or few reported cases; CDC recommends mosquito precautions there rather than routine pills. No routine pills does not mean no malaria.
| Destination | Malaria prevention | CDC guidance |
|---|---|---|
| Provinces bordering Myanmar, Cambodia except Buri Ram, and Malaysia | Recommended | Risk is especially associated with forest and forest-fringe areas; review the entire province itinerary. |
| Bangkok, Chiang Mai, Chiang Rai, Phuket, Koh Samui, Koh Phangan and Buri Ram | Mosquito precautions | CDC reports rare or few cases and does not recommend routine prevention medicine. |
| Krabi islands: Koh Lanta, Koh Phi Phi, Koh Yao Noi, Koh Yao Yai; Pattaya City | No routine malaria pills | CDC lists no transmission in these locations. Keep mosquito precautions for other infections. |
The prevention recommendation follows the exact province and route. Do not limit it to remote jungle treks or treat a whole province as malaria-free because its main tourist city has a lower risk.
For the listed Thai border provinces the CDC lists atovaquone-proguanil (Malarone), doxycycline, and tafenoquine. It does not list chloroquine or mefloquine here because resistance to both is common in this region, which is an important detail. Two of the recommended options, doxycycline and Malarone, we prescribe for a flat $45, sent to your own pharmacy. See doxycycline vs Malarone.
I am Bidwell Cranage, a nurse practitioner and Member of the International Society of Travel Medicine, and I traveled Thailand and Cambodia myself. I got the typhoid vaccine before that trip.
For most Thailand trips, the thing worth preparing for is traveler's diarrhea, not malaria. Many travelers carry a standby azithromycin course so a bad case does not cost them island or temple days. We can include it with your visit for the flat $45.
We do not give vaccines. We refer you to a travel clinic for those and can handle a standby antibiotic, a scopolamine patch for ferries, or border-area malaria pills online. See online travel medicine vs a travel clinic.
For one flat $45 visit, sent to your own pharmacy with no markup, we can cover a standby antibiotic for traveler's diarrhea (the most common Thailand need), a scopolamine patch for ferries to the islands, and malaria pills (doxycycline or Malarone) when the route includes a CDC prevention province, not only a remote forest trek. We refer you to a travel clinic for hepatitis A and typhoid shots, and for tafenoquine or pregnancy.
Destination recommendations checked October 15, 2026. CDC destination guidance provides current malaria areas and vaccine entry rules. Check every stop and transit country; recommendations and entry rules can change.
CDC recommends malaria prevention for provinces bordering Myanmar, Cambodia except Buri Ram, and Malaysia, especially forest and forest-fringe areas. Common city and island routes often need mosquito precautions rather than pills. Share every stop for individual review.
For Bangkok, Phuket and Chiang Mai, CDC recommends mosquito precautions rather than routine malaria pills. It reports rare or few cases in these places, so they should not all be described as malaria-free. Border-province side trips can change the recommendation.
CDC recommends malaria prevention medicine for provinces bordering Myanmar, Cambodia except Buri Ram, and Malaysia, particularly forest and forest-fringe areas. Doxycycline and atovaquone-proguanil are among the options; the clinician reviews suitability and every stop. Other reported areas generally need mosquito precautions.
Review vaccines, food and water safety, mosquito precautions and any malaria-risk stops. A standby antibiotic or motion-sickness medicine may be appropriate after an individual assessment. Bidwell offers a $45 visit, with medication separate, and refers vaccine needs to a travel clinic.
Fever during or after travel to a malaria-risk area needs prompt medical assessment. Tell the clinician your itinerary even if you took prevention medicine. Do not wait for a routine online visit or assume it is traveler's diarrhea.