Pharmacies in Bangkok, and bringing your own medication
Thailand does not divide medicines into prescription and over-the-counter. It runs two separate systems: four ministerial lists that decide who may hand a box across a counter, and a set of schedules that decide whether that box may cross the border at all. Almost every confusion — including the famous thirty-day rule — comes from mixing them up.
The short version
- Four categories, not two. Household remedy, ordinary finished medicine, dangerous drug, specially controlled drug.
- The category is printed in red on the box. The Drug Act requires it.
- The sign outside names the pharmacist and their hours — and outside those hours the shop may not lawfully sell you the top two categories.
- Antibiotics are a “dangerous drug”, which means a pharmacist, not a doctor. That is a rule about dispensing, not a medical opinion.
- The 30-day rule is the psychotropic rule. Up to 30 days, prescription only, no permit.
- 31 to 90 days of a psychotropic needs a permit, applied for at least 15 days ahead.
- A narcotic needs a permit at any quantity — codeine included — up to a 90-day supply.
- Your decongestant may be a psychotropic here. Pseudoephedrine is on the Schedule II list.
- Some medicines cannot come in at all, including amphetamine and dextroamphetamine. Posting them is not a workaround.
- The official guidance contradicts itself on the red channel. We show both readings.
Two systems that answer different questions
A Bangkok pharmacy will sell you, without a prescription, something your home pharmacy would refuse. The same city’s airport will treat a bottle in your suitcase as a controlled import that needed paperwork filed a fortnight before you flew. Both facts are true, and they are not in tension, because they belong to different statutes doing different jobs.
The Drug Act B.E. 2510 governs what happens at a counter inside Thailand. It asks which of four ministerial categories a medicine sits in, and who is standing behind the counter.
The Narcotics Code governs what crosses the border. It asks which schedule a substance sits in, how many days of supply you are carrying, and whether you hold a permit.
Nothing in the first system tells you anything about the second. A medicine can be sold from a Bangkok shelf and still be one you could not have carried in without a permit — and, more painfully, a medicine can be entirely routine at home and prohibited here.
Four lists, and the word is printed in red
Read the Drug Act’s definitions and the first surprise is how little chemistry there is in them. A dangerous drug is a modern or traditional medicine which the Minister declares to be a dangerous drug. A specially controlled drug is one the Minister declares to be specially controlled. A household remedy is one the Minister declares to be a household remedy. The categories are administrative lists, not properties of the molecule, which is why a medicine can be freely available in one country and pharmacist-only here without anyone having changed their mind about the pharmacology.
The fourth term in the family is the finished medicine — a product manufactured into its final pharmaceutical form, packed in a sealed container and fully labelled. It matters because of the licence structure. Section 15 lists the licence types for modern medicines, and alongside the full sale licence there is a narrower one: a licence to sell only finished medicines that are not dangerous drugs and not specially controlled drugs. That is the legal basis of the small shop that stocks familiar boxes and cannot lawfully go further.
And the whole classification is readable from the packaging. Section 25(3) requires the label to show, among much else, the words “dangerous drug”, “specially controlled drug”, “external use” or “topical use” as the case may be, in red lettering, clearly visible, and the words “household remedy” where that is what it is. You do not need to read Thai to use this. You need to notice whether there is red text in the corner of the box.
What the red word tells you. Not that the medicine is dangerous in any everyday sense — the category name is older than the modern usage. It tells you that the law expected a pharmacist to be the person who handed it to you, and that the shop is required to store it separately from the ordinary stock. If a box with red lettering comes off a shelf you served yourself from, you have learned something about the shop.
The sign outside is a legal document
Most people walk past the plastic sign by the door. It is doing more work than it looks.
Section 26 requires the licensee to display, at an open place in front of the premises and easily visible from outside, a sign showing that the premises sell medicines, and a second sign giving the name, surname and qualification of the person on duty, together with the hours during which they are on duty. The same section requires dangerous drugs, specially controlled drugs and other drugs to be stored in separate areas, requires a dedicated area for compounding on a practitioner’s prescription, requires the labels to be kept intact, and requires purchase and sale records.
Section 39 puts the pharmacist inside those hours: a first-class pharmacist must be present at the premises throughout the time it is open, and among their duties is controlling the delivery of dangerous drugs, specially controlled drugs, and drugs dispensed on a practitioner’s prescription. Section 40 draws the line between the two grades of pharmacist — a second-class pharmacist does the same job except that compounding, selling and delivering specially controlled drugs is closed to them.
Then section 32 turns all of that into a rule with a clock on it: the licensee must not sell dangerous drugs or specially controlled drugs during any period when the pharmacist is not on duty.
So the practical test in a shop you do not know is two glances. Does the sign name a pharmacist and give hours? Are we inside those hours? If the answer to either is no, the shop cannot lawfully sell you anything with red lettering on the box, whatever is in the drawer.
Two other things the same sections quietly tell you
Section 33 requires a licensee who wants to change the person on duty to notify the licensing authority in writing and wait for approval — and, if the premises are left with no person on duty at all, to report that in writing within seven days. A law that provides for a seven-day notification window is a law that expects gaps to happen, which is worth knowing when a shop tells you the pharmacist is out.
Section 26 also requires the shop to keep accounts of the medicines it buys and sells, in the manner prescribed by ministerial regulation, and section 15 separates animal medicines into their own limited licence. Neither will change your afternoon, but both explain features you will notice: the notebook that comes out for some purchases and not others, and the fact that the shop with the pet-shampoo window is not necessarily licensed for anything else.
Why antibiotics feel free here, and what that actually means
The single most-discussed feature of Thai pharmacies among new arrivals is that antibiotics can be bought without seeing a doctor. The legal explanation is unglamorous: systemic antibiotics sit in the dangerous drug category rather than the specially controlled one, and the requirement attached to that category is a pharmacist, not a prescription.
That is a rule about who may lawfully hand something over. It is not a statement that self-prescribing is a good idea, and this page is not the place for a view on the clinical question. What is worth carrying away is the structural point: the category ladder in Thai law is about supervision, and only the top rung requires a prescriber. Which rung a given medicine sits on is a decision the Minister has published, not something you can infer from how the medicine is treated in your own country.
The border system, and the rule everybody half-remembers
Search in English for bringing medicine to Thailand and you will meet the thirty-day rule within two clicks. It is real. It is also only one of three tracks, and it is not the one that catches people out.
The Thai FDA’s Narcotics Control Division publishes a guidance note for travellers under treatment carrying personal medications containing narcotic drugs or psychotropic substances. The current version is version 5, dated 21 September 2024, and it reflects a ministerial regulation issued under the Narcotics Code that took effect the same day. It opens with the general position, which is easy to miss: the import and export of narcotics and psychotropic substances into or out of Thailand are generally prohibited. Everything that follows is an exception carved out for people under treatment.
| What you are carrying | How much | Permit | What you must hold |
|---|---|---|---|
| Narcotic drug, Schedule II or III | Up to a 90-day supply as prescribed | Yes — form IC-2, applied for at least 15 days before travel | Permit, prescription or signed medical document, passport copy filed with the application |
| Psychotropic substance, Schedule II, III or IV | Up to a 30-day supply as prescribed | No | Certificate or prescription from the prescribing physician |
| Psychotropic substance, Schedule II, III or IV | 31 to 90 days of supply | Yes — same form, same 15 days | As for narcotics |
| Narcotic Schedule I or V; psychotropic Schedule I | Any | Not permitted — described as having no medical use in Thailand. The prohibition covers postal parcels. | |
The asymmetry is the thing to hold on to. For psychotropics, the permit is triggered by quantity: under thirty days you need only your prescription. For narcotics, the permit is triggered by the substance: the guidance states the permit requirement without a quantity threshold beneath it, so a short course is on the same footing as a long one.
That distinction has a very ordinary consequence. Codeine is on the Schedule II narcotic list the guidance gives, alongside fentanyl, morphine, methadone, oxycodone, hydromorphone, pethidine and tapentadol. A week of a codeine-containing painkiller is, on the face of this guidance, in the permit track — and the permit has a fifteen-day lead time that a traveller who has just been prescribed something does not have.
The names on the list that surprise people
The guidance prints example lists for each schedule, and they repay a careful read before packing rather than after landing.
Pseudoephedrine is a Schedule II psychotropic. The decongestant sold in supermarkets in much of the world is, in the Thai classification, in the same schedule as alprazolam, midazolam, methylphenidate, phentermine, zolpidem and zopiclone. Under thirty days it travels on a prescription; it does not travel as a shopping item.
Amphetamine and dextroamphetamine are prohibited outright. They appear in the guidance’s examples of narcotic Schedules I and V, which it describes as having no medical use in Thailand. For a traveller managing attention deficit disorder this is the sharpest line on the page, because the neighbouring medicine is treated completely differently: methylphenidate is listed as a Schedule II psychotropic, which puts it in the thirty-day track with a prescription. Two medicines for the same condition, two different legal universes.
The everyday benzodiazepines are Schedule IV. Diazepam, clonazepam, lorazepam, bromazepam, chlordiazepoxide, clobazam, oxazepam and phenobarbital are in the guidance’s Schedule IV examples; alprazolam, nitrazepam, triazolam, temazepam and flunitrazepam are in Schedule II. All of them are inside the psychotropic track, so the thirty-day line governs.
Dronabinol, GHB, cathinone and psilocin are Schedule I psychotropics — prohibited, again described as having no accepted medical use here.
None of this can be settled by how a medicine is regulated at home. The guidance itself says so in as many words: travellers should not assume medicines legal in other countries are approved in Thailand, and should check before each visit.
The permit, and the fifteen days
The application is form IC-2, submitted online through the FDA’s traveller permit portal at least fifteen days before travelling. The guidance says a completed application is processed in roughly three working days and the permit is emailed to you; that you should print it or be ready to show the file on your phone; and — a detail that has clearly cost people an evening — that the form should be completed on a PC or laptop using the Chrome browser, because it cannot be done on a mobile phone.
What goes with the application is a passport copy and a prescription or medical document signed by the physician who provided the treatment, containing all of: the patient’s name and address; the diagnosed condition; the names of the medicines, their strengths, instructions for use and the reason they were prescribed; the dosage and the total amount prescribed; and the prescriber’s name, address and licence number. Originals are not posted to the FDA — you keep them and travel with them.
Four smaller instructions in the same document are worth following because they are cheap: keep medicines in their original prescription containers with the contents clearly labelled; keep all related documents with you for the whole trip; do not sell or supply your medication to anyone else; and note that a permit obtained to bring medicines in also covers taking them out again when you go home.
The animal in the same paragraph
One clause of the psychotropic rules is easy to skim past and matters to a particular kind of traveller: both the thirty-day allowance and the thirty-one-to-ninety-day permit track are stated to include travellers with animals that are under treatment. A dog on a psychotropic medicine is inside the same framework as its owner, with the same requirement for a certificate or prescription containing the details listed for a human patient, and the same permit if the supply runs past thirty days. If you are moving a pet as well as yourself, that clause is the one to read alongside our guide to keeping a pet in Bangkok.
The exit leg is thinner but real. The guidance asks travellers leaving Thailand to present any remaining medications and documents at customs on request, and states that where a permit was obtained to bring medicines in, no separate permit is needed to take them out. So the paperwork you assemble before the outbound flight is the paperwork that closes the loop on the way home.
The contradiction, and what we would do with it
The advice section of the guidance contains two statements that do not sit together, and rather than paper over it we will show both.
The first says that travellers carrying medications containing narcotics in Schedules II and III or psychotropic substances in Schedules II, III and IV are required to declare them on entering Thailand, and must present the medications and documents at the Customs Department’s red channel.
The second, immediately after, says that travellers carrying all other medications including those containing psychotropic substances in Schedules II, III and IV do not need to declare them at the red channel if the medication is for personal use, in a quantity not exceeding a thirty-day supply, and accompanied by a certificate or prescription — in which case they count as personal belongings.
The two agree completely about narcotics: declare them. They disagree about a thirty-day supply of a psychotropic. Our reading, and we mark it as ours rather than the document’s, is that the second paragraph is the specific one and the first is a general statement of the category, but that the asymmetry of consequences settles the practical question anyway. Choosing the red channel with a labelled bottle and a prescription costs you a queue. Choosing the green channel and being wrong is a customs conversation about a controlled substance.
Running out while you are here
The two systems meet awkwardly when a traveller’s supply runs out mid-trip, and it is worth understanding why rather than being surprised at a counter.
A specially controlled drug is dispensed against a prescription, and the Drug Act consistently frames the prescriber as a person practising medicine, the modern healing arts or veterinary medicine — the Thai professional categories the Act is built around. On top of that, anything containing a narcotic or psychotropic substance is governed by the Narcotics Code rather than by the Drug Act alone. The result is that a foreign prescription is not a document the Thai system has a slot for, however genuine it obviously is.
The route that keeps everything inside one legal system is to see a prescriber in Thailand, bringing the original packaging and whatever documentation you have. Our guide to seeing a doctor in Bangkok covers what obliges a hospital to treat you and what obliges somebody to pay, which is the other half of that decision.
A note on cannabis, deliberately short
Cannabis is not a pharmacy question in Thailand and its rules have moved repeatedly. Since a Ministry of Public Health notification published on 25 June 2025 and effective the following day, cannabis flower has been a controlled herb under the traditional medicine framework, sold only under licence and dispensed against a prescription; secondary legal commentary reports a further ministerial regulation published on 30 April 2026 tightening who may hold a dispensary licence, and a consolidating Cannabis and Hemp Act still in draft. We have not read the 2026 instrument in the Gazette, so this page prints no detail from it. The stable advice is the boring kind: this area is governed by notifications that change faster than any English page can track, and anything you are told about it that is more than a few months old should be checked before you rely on it.
Questions people actually ask
- Can I buy antibiotics without a prescription?
- They are in the dangerous drug category, which requires a pharmacist rather than a prescriber. That is a dispensing rule, not a clinical endorsement, and the category above it — specially controlled — does require a practitioner’s prescription.
- How do I know which category something is in?
- The label. Section 25(3) requires “dangerous drug” or “specially controlled drug” to appear in red lettering, clearly visible, and household remedies to be marked as such.
- Is the pharmacy I am standing in allowed to sell me this?
- Check the sign for the name and duty hours of the person on duty. Outside those hours, section 32 forbids the sale of dangerous or specially controlled drugs.
- What exactly is the thirty-day rule?
- It is the psychotropic threshold: up to a 30-day supply of a Schedule II, III or IV psychotropic needs a prescription or certificate but no permit. From 31 to 90 days you need the permit. Narcotics are a separate track and need the permit anyway.
- My painkiller has codeine in it.
- Codeine is in the guidance’s Schedule II narcotic examples, so it falls in the permit track regardless of how few days you are carrying — and the permit wants fifteen days’ notice.
- I take medication for ADHD.
- The two common families are treated oppositely. Amphetamine and dextroamphetamine appear in the prohibited examples; methylphenidate appears as a Schedule II psychotropic, which puts it in the 30-day track with a prescription. Check which one you actually hold, on the box, before you fly.
- Can I post my medicine to myself instead?
- No. The prohibition on importing narcotics and psychotropics outside the traveller exception is stated to include postal parcels, and the exception is built around a person under treatment carrying their own supply.
- Do I have to walk through the red channel?
- For narcotics the guidance clearly says yes. For a 30-day supply of a psychotropic it says both yes and no in consecutive paragraphs. The downside of declaring is a queue; the downside of not declaring, if the stricter reading is the operative one, is considerably worse.
Two weeks before you fly, not two days. Take a photograph of every box you intend to travel with, find the active ingredient on each one, and check it against the schedules in the FDA guidance. If anything lands in the narcotic list, or if you are carrying more than thirty days of anything psychotropic, the permit application needs to be in fifteen days ahead — and it needs a prescription written to a specification your doctor will not guess at unless you show them the list.
How we made this
Where this came from
The counter rules are from the Drug Act B.E. 2510, read in a Thai government reproduction of the Council of State edition. From it come the definitions of dangerous drug, specially controlled drug, household remedy and finished medicine — each defined as what the Minister declares it to be — the licence types in section 15 including the limited licence for finished medicines that are neither dangerous nor specially controlled, the red-lettering requirement in section 25(3), the shop duties in section 26 including the sign showing the name, surname, qualification and duty hours of the person on duty and the separate storage of the two restricted categories, the prohibition in section 32 on selling those categories while the pharmacist is off duty, the pharmacist’s duties in section 39 including control of delivery, and the limits on a second-class pharmacist in section 40.
The border rules are from the Thai Food and Drug Administration’s Guidance for Travelers under Treatment Carrying Personal Medications Containing Narcotic Drugs or Psychotropic Substances into Thailand, version 5 dated 21 September 2024, published in English by the FDA’s Narcotics Control Division on its traveller permit site and read in full. From it come the general prohibition and its exception, the ministerial regulation of B.E. 2567 effective 21 September 2024, the 90-day narcotic allowance with a permit, the 30-day and 31-to-90-day psychotropic thresholds, the form IC-2 process with its fifteen-day lead time and roughly three working days of processing, the PC-and-Chrome instruction, the document list for the application, the schedule example lists we quote, the prohibited categories, the storage, non-supply and re-export instructions, and both of the conflicting statements about the red channel.
That systemic antibiotics fall in the dangerous drug category, and that specially controlled drugs require a practitioner’s prescription in practice, are taken from continuing-education material published by the Pharmacy Council of Thailand for pharmacists — a professional body rather than a legislature, and cited as such. The cannabis paragraph rests on the Ministry of Public Health notification on controlled herbs published on 25 June 2025 and effective 26 June 2025, as reported by Thai health-policy and broadcast outlets, and on secondary legal commentary for the April 2026 ministerial regulation.
What we could not reach. The Royal Gazette’s own site refuses connections from where we work, and the FDA’s narcotics subdomain does not open a connection at all, so the ministerial regulation of B.E. 2567 is described as the FDA’s guidance describes it rather than from its own text. We did not exercise the FDA’s substance-lookup tool, so every schedule attribution on this page is one the guidance itself prints as an example — and an example list is not the schedule. We have not read the Minister’s notifications listing dangerous and specially controlled drugs, which is why this page names no medicine as belonging to either category except antibiotics, on the professional-body source above. The version of the Drug Act we read carries amendments to the fifth, of B.E. 2530; a sixth amendment of B.E. 2562 exists and we did not read it, though it is not understood to have changed the categories.
What we deliberately left out. Any clinical view whatsoever — on whether to self-treat, on substituting one medicine for another, or on what to do if you cannot bring yours. Prices, which vary between a chain and a shophouse and which we have no reliable way to state. Named pharmacy chains and hospital pharmacies, since this page is about rules rather than shopping. Any list of which specific brands sold in Bangkok contain which controlled ingredient, which changes and would be worse than useless if wrong. And any suggestion that customs officers will interpret the guidance the way we read it — the contradiction is in the document, and how it is applied on a given day is not something we can observe from here.
Town Wire News is an English-language reference desk. We are not based in Bangkok, we are not doctors, pharmacists or lawyers, and this page describes published rules rather than medical or legal advice. If you are travelling with a controlled medicine, the FDA’s own traveller guidance and its narcotics division are the authorities to check with, and their published contact address and telephone number are in that guidance. Spotted something out of date, or reached a source we could not? Tell us on our corrections page.