Thailand Pharmacy Guide: Medicines Without a Prescription

In Thailand a licensed pharmacist can sell many medicines that need a prescription at home, and that includes a lot of antibiotics. Most antibiotics are classed as "dangerous drugs" under the 1987 Drug Act, which pharmacists may dispense, and only a few are prescription-only. That convenience is also why antibiotic overuse is a recognised problem in Thailand, so use it with care.

Pharmacies: What to Expect

Pharmacies range from big chains in cities (Boots and Watsons both operate branches across Thailand) to small independent shops. Labels and staff English vary, so a photo of your regular medicine's box or a screenshot of the generic (active ingredient) name helps a lot.

Ask for the generic name. Brand-name medicines are often pricier than local versions of the same drug (UK FCDO health advice), and prices vary by shop, so ask the price before you pay.
Avoid medicine sold on the street. The UK government warns that street-sold medication may be fake or stolen.
Thai pharmacists train for six years. The Doctor of Pharmacy is a 6-year programme, so describe your symptoms and ask questions rather than just pointing at a shelf.
For anything serious, see a doctor. Clinics and hospitals are covered in our Thailand hospitals guide.

How Thai law sorts medicines

Thai law splits medicines into groups that decide who may sell them:

Household remedies are lower-risk products for common, minor complaints. Only products designated as household remedies may be sold outside a licensed pharmacy, for example in general shops.
Dangerous drugs generally have to be dispensed by a pharmacist or another authorised professional, but they do not all need a doctor's prescription. Ibuprofen and cetirizine are examples that sit in this group, so ask the pharmacist before you buy.
Specially controlled drugs have tighter rules and generally need an authorised prescription. Narcotics carry additional controls.

The sales status differs from product to product, even within one type of medicine. Look for a licensed pharmacy where a pharmacist is on duty, and ask to see the shop's licence or the pharmacist's identification sign if you are unsure. Paracetamol, some antihistamines, oral rehydration salts and antacids are the usual over-the-counter items to ask about.

Taking your own prescription medicine in

For non-controlled medicine, bring no more than about 30 days of the prescribed amount, in the original packaging, and carry the prescription. Psychotropic medicines in Categories 2 to 4 are allowed for up to 30 days with a doctor's certificate. The certificate should give your name and address, the condition, the medicine name and strength, dosage and total amount, and the prescriber's name, address and licence number. For 31 to 90 days of psychotropics you need an FDA permit. Category 2 narcotics such as morphine, oxycodone and fentanyl need an FDA permit applied for at least 15 days before arrival. The controlled lists change, so check the Thai FDA schedule before you travel.

The UK FCDO adds that hospitals and pharmacies in Thailand will usually accept UK prescriptions, and that the legal status of some medicines bought or prescribed in the UK can differ abroad.

Pharmacy Chains

Chains are easy to find in malls, supermarkets and main roads in cities and tourist areas. One travel guide notes that chains usually have more English-speaking staff in big cities and tourist areas, but can be pricier and carry a narrower range than independent shops.

Boots

Boots, the UK chain, has branches in malls and supermarkets across Thailand. It is a convenient first stop for common items such as ibuprofen, and branded products are easy to recognise.

Watsons

Watsons is run in Thailand by Central Watsons, a joint venture between Central Group and AS Watson, and has stores across the country. It sells similar everyday health and beauty items to Boots.

Local Independent Pharmacies

Independent pharmacies far outnumber the chains and are often the only option on smaller islands. Look for the green cross sign outside and a licence displayed behind the counter. Prices can differ a lot between shops, so asking a second shop is reasonable. Some shops are less careful about dosing and expiry dates, so check dates on the box yourself.

Hospital Pharmacies

Hospital pharmacies mainly fill prescriptions for hospital patients and are not set up for walk-in shopping. One guide reports that hospital prescriptions can cost two to three times the price at outside pharmacies. If a doctor prescribes something, you can ask for the prescription and fill it at a pharmacy, or check whether your insurance covers it.

Antibiotics Without a Prescription: What Is Allowed

Researchers describe Thailand as a place where a licensed pharmacist can legally dispense antibiotics and where most can be bought at a pharmacy without a prescription. Under the 1987 Drug Act most antibiotics are "dangerous drugs", which a pharmacist may dispense, and only a few are prescription-only. In practice the status depends on the product: many are dangerous drugs, while some, including certain injectable antibiotics, are specially controlled. A pharmacy cannot be assumed to sell every antibiotic without a prescription.

Why to be careful:

The WHO says misuse and overuse of antimicrobials drive the spread of drug-resistant infections.
Easy access is part of the picture in Thailand: a 2023 study of Bangkok residents notes that human antibiotic consumption in Thailand rose by 20.9% between 2017 and 2019, and calls antibiotic resistance a major problem in low- and middle-income countries.
Antibiotics treat bacterial infections, not colds or flu, which are usually caused by viruses.
The right drug depends on the infection. For traveler's diarrhea the CDC prefers azithromycin in Southeast Asia (see Stomach Relief below), because resistance to fluoroquinolones such as ciprofloxacin is common in the region.

When to see a doctor instead: fever with diarrhea, blood in the stool, diarrhea lasting more than two weeks, signs of dehydration, an infection that is spreading or getting worse, chest pain or breathing difficulty, or anything you cannot identify. A clinician can examine you and, where needed, test before choosing a drug. If you do buy an antibiotic, ask the pharmacist its name, what it is for and how long to take it, and finish the course as directed.

Common Things Travelers Buy

Ask the pharmacist about dose, interactions with your own medicines and allergies before taking anything. The list below is a starting point for the conversation, not a prescription.

Stomach Relief

Oral rehydration salts (ORS): the core treatment for diarrhea and vomiting. The CDC advises dissolving one packet in about 1 L of boiled or treated water.
Loperamide (Imodium): the CDC says antimotility agents alone are not recommended if you have bloody diarrhea, or diarrhea with fever.
Antibiotics for traveler's diarrhea: for Southeast Asia the CDC names azithromycin as the first-line option (1,000 mg as a single dose, or 500 mg daily for 3 days), because fluoroquinolone resistance (for example ciprofloxacin), especially in Campylobacter, is common in the region. Severe, bloody or feverish diarrhea, or diarrhea lasting more than two weeks, needs a clinician.

Oral rehydration, in more detail: The WHO describes ORS as a mix of clean water, salt and sugar that replaces the water and electrolytes lost in diarrhoea. The CDC notes that sugary drinks such as soda can cause osmotic diarrhoea if drunk in quantity, and that sealed, boiled or otherwise purified drinks are the safe choice. Infants, young children, older adults and people with chronic illness need extra attention to fluids.

When to stop self-treating and see a doctor: The WHO says to consult a health professional for diarrhoea lasting 14 days or longer, blood in the stool, or any sign of dehydration. Its signs of some dehydration are restlessness or irritability, sunken eyes and drinking eagerly because of thirst. Severe dehydration is lethargy or unconsciousness, sunken eyes, being unable to drink or drinking poorly, or a skin pinch that goes back very slowly (2 seconds or more). Severe dehydration is treated with intravenous fluids, which a pharmacy cannot give. The CDC also says diarrhoea lasting more than 2 weeks is more often caused by protozoa.

Antacids and heartburn medicines are also routine pharmacy items. Describe your symptoms and let the pharmacist suggest options.

Antiparasitics

Worms and giardia are diagnosed by a stool test, and the right drug depends on the result. Persistent diarrhea is the usual reason to ask. The CDC says diarrhea lasting more than 2 weeks is more often caused by protozoa, so that is the point to see a clinician rather than guess.

Antifungals

Antifungal creams for athlete's foot and other skin fungus are routine pharmacy items in a humid climate. Show the pharmacist the rash, and see a doctor if it spreads or does not clear.

Pain & Fever

Paracetamol (acetaminophen) and ibuprofen are the usual choices; follow the label. Ibuprofen is a dangerous drug in the Thai classification, so a pharmacist hands it over rather than it being sold from a general shop. A fever that lasts, or comes with a rash or severe headache, needs a doctor.

Skin Treatments

Hydrocortisone creams, antiseptic creams and bite-itch creams are routine pharmacy items. See a doctor for a wound that is red, hot, swollen or draining.

Antihistamines

Cetirizine and similar antihistamines are sold by pharmacists for allergies and itching from bites; cetirizine is a dangerous drug in the Thai classification. Some antihistamines cause drowsiness, so ask before driving a scooter.

Eye Drops

Lubricating and allergy eye drops are routine pharmacy items. See a doctor for an eye infection that does not clear quickly, and do not use leftover antibiotic drops without advice.

Malaria Pills: Most Backpackers Do Not Need Them

The CDC lists malaria risk in Thailand mainly in rural forest and forest-fringe areas of provinces bordering Myanmar, Cambodia and Malaysia, plus Surat Thani, Ubon Ratchathani and Phitsanulok. Rare to few cases occur in Bangkok, Chiang Mai, Chiang Rai, Koh Phangan, Koh Samui and Phuket, and the CDC lists no malaria on the Krabi islands (Koh Phi Phi, Koh Lanta and others) or in Pattaya.

For the higher-risk areas the CDC lists atovaquone-proguanil, doxycycline or tafenoquine. Elsewhere in Thailand no medication is recommended, only mosquito avoidance.
Do not start doxycycline for malaria prevention on a pharmacist's say-so alone. Talk to a travel clinic before you go if your route includes border forest areas.

Controlled Medicines: Do Not Expect to Buy or Carry These

Thailand controls many sedatives, stimulants and strong painkillers. The Thai FDA's guidance for travelers lists, for example:

Narcotics Category 2: codeine, morphine, methadone, oxycodone, fentanyl and similar.
Psychotropic Category 2: alprazolam (Xanax), methylphenidate, zolpidem, phentermine and pseudoephedrine.
Psychotropic Category 4: diazepam (Valium), clonazepam, lorazepam.
Prohibited outright (Category 1 and 5 narcotics): amphetamine and dexamphetamine, which covers Adderall-type medicines.

If you bring your own prescription medicine, see the rules in our Thailand drug laws guide.

How to Communicate Your Symptoms

In major cities many pharmacists understand basic English. Elsewhere use a translation app: type your symptom, show the Thai text and let the pharmacist recommend something.

"ยาอะไรดีสำหรับ..." (yaa a-rai dee sam-rap...): "What medicine is good for...?"
"ฉันมีอาการท้องเสีย" (chan mee a-gaan tong sia): "I have diarrhea"
"ฉันมีไข้" (chan mee kai): "I have a fever"
"ฉันเป็นหวัด" (chan pen wat): "I have a cold"

How to Spot a Bad Pharmacy

Expired medicines on the shelf (check dates on boxes)
No labels in English or Thai on boxes
Vaccines sitting at room temperature (they must be refrigerated)
Dirty or disorganised stock
Pressure to buy things you did not ask for

Good pharmacies are clean, labels are visible and the pharmacist asks you questions before selling.

Common Costs

Prices vary by brand, shop and location, so the reliable approach is to ask the price before you buy.

Generic versus brand: brand-name medicines are often pricier than local versions of the same drug (UK FCDO).
Between shops: one travel guide reports that prices at independent pharmacies can differ by as much as 200 percent, so a second shop can save money.
Hospitals: the same guide reports hospital prescriptions at roughly 200 to 300 percent of outside pharmacy prices. These are one guide's approximate figures, not a price list.
Cheaper route: ask for the generic name, compare two shops, and if a doctor prescribes something, ask for the prescription so you can fill it at an outside pharmacy.

Bring From Home

Medicines for chronic conditions, in original labelled packaging with a doctor's letter
Emergency medicines such as an EpiPen
Anything on the controlled lists above

Pack a small first-aid kit for the first few days and buy the rest once you are settled.

When to Go to a Hospital Instead

For an emergency the UK FCDO gives 191 for an ambulance and 1669 as the local medical emergency number. It describes private hospitals as high standard but potentially expensive, says public hospitals and clinics do not always meet UK standards outside Bangkok, and warns that all hospitals require a guarantee of payment before treating patients. Carry travel insurance that covers local treatment and medical evacuation, and contact your insurer promptly if you are referred to a facility.

Where to Find Pharmacies

Cities and main beach areas have plenty. Islands and rural areas have fewer and smaller shops with limited stock, so stock up on essentials before heading somewhere remote.