Thailand drug laws

The rules in one minute

It's all one narcotics law, the Narcotics Code, in force since 9 December 2021.

• Almost every party drug is illegal, with prison for possession and for use
• A positive urine test is the evidence, even with nothing in your pockets
• Refusing a test is a separate offence
• Cannabis needs a Thai prescription; recreational sale is illegal
• Kratom leaf is off the narcotics list; vapes are banned
• Some prescription medicines need paperwork, and a few can't come in at all

For a group, the rule is one line: no drugs, no exceptions, and no favours for strangers.

Unsure about anything you're packing? Ask Tanner.

At a glance

Thailand drug penalties depend on the category: drugs sit in five, as Thai Law Online's guide to the Narcotics Code explains (updated October 2026), and law firm Siam Legal lists the examples below.

The top penalties are for making, importing, exporting, selling or holding drugs to sell.

What gets tourists arrested

The drug laws in Thailand for tourists are the same as for Thais, with the same penalties, and foreigners who live here get no special treatment.

Using drugs and holding them are both offences. Thai Law Online puts use of a Category I, II or V drug at up to a year in jail, a fine of up to ฿20,000, or both. Selling, importing or exporting carries far heavier penalties, up to life in prison for Category I.

The common traps are buying from a stranger at a party, holding a friend's bag, and carrying a vape. Ask Tanner if anyone in the group isn't sure.

Can police test tourists?

Yes. Under section 115 of the Narcotics Code, police can test you, or order a test, on reasonable grounds, and they don't need to find drugs first, Thai Law Online explains.

Test positive and you can be held for up to 24 hours while treatment is arranged.

Refusing a test in a narcotics investigation can mean up to a year in jail, a fine of up to ฿20,000, or both. Ask Tanner to keep the car close, so nobody is walking home alone at 3am.

Is the death penalty still used?

It's still in the law for the worst Category I cases: Phuket Expat Guide lists death for trafficking methamphetamine, heroin or fentanyl.

Thailand's last execution, for murder, was in June 2018. Trafficking still means very long prison terms.

Ask Tanner before the trip if anyone in the group has questions about the rules.

Ketamine, kratom and the drugs people ask about

Ketamine sits under a separate law, the Psychotropic Substances Act, as a Schedule 2 drug, says Siam Legal, with 1 to 5 years in prison for possession or use.

Is kratom legal in Thailand? The leaf came off the narcotics list on 24 August 2021, says law firm Tilleke & Gibbins, and the rules that followed ban sales to minors.

Magic mushrooms are a Category V narcotic, with heavy prison terms. Ask Tanner what's on the menu instead: the bottle and the table.

Is cannabis legal?

It's been medical-only since late June 2025: the flower is a controlled herb, and buying it needs a prescription from a licensed practitioner in Thailand, the Thai government says. See our cannabis laws guide.

Smoking in public is banned, and bringing cannabis in or out of Thailand is a crime.

The full rules, fines and dates are in that guide. Ask Tanner if you're unsure what's allowed where you're staying.

Vapes are illegal in Thailand

Vapes and e-cigarettes are illegal to bring into Thailand, buy or sell here, whatever is in them, the Thai government says. More in our Thailand nightlife laws guide.

Importing one can mean up to 10 years in prison, a fine of up to ฿500,000, or both, under the Customs Act, the government page notes.

Leave the vape at home, and ask Tanner which venues on your nights out have a smoking area.

Bringing your prescription medicine

Everyday medicine is fine for a short trip: Thailand Starter Kit (updated October 2026) says up to 30 days' supply, in its box, with the prescription.

Codeine, morphine and other Category II medicines need a Thai FDA permit whatever the amount. Diazepam, zolpidem or methylphenidate need a doctor's certificate for up to 30 days, and a permit beyond that.

Insider tip: Adderall is a Category I narcotic in Thailand, so it can't come in even with a prescription. Ask your doctor about a substitute well before you fly, and ask Tanner if you need a pharmacy on arrival.

How a group stays safe

The law catches groups when one person takes a risk for everyone.

Agree the rule before you fly: no drugs, nobody holds anything for anyone else, and nobody buys from a stranger on the beach or in a club.

Keep the group together with a car that waits.

Our host stays with the group all night, so nobody drifts off alone. Ask Tanner to add the host to your nights out.

If someone in the group is arrested

Stay calm and polite. Ask for your embassy, a lawyer and an interpreter.

Don't sign anything you can't read, and don't agree to anything on the spot.

Call the Tourist Police on 1155 for help in English, and tell the rest of the group where you are.

Save your embassy's number in your phone before you fly. It takes a minute.

Thailand drug laws in short

• What it is: one narcotics law, the Narcotics Code, in force since 9 December 2021.

• Drugs sit in five categories, and heroin, methamphetamine, MDMA and LSD are in Category I, the most serious.
• Police can order a urine test on reasonable grounds, and drug use carries up to a year in jail.
• Tourists face the same laws and penalties as Thais.
• Cannabis needs a Thai prescription, kratom leaf is off the narcotics list, vapes are banned, and Adderall can't come in even with a prescription.

Checked October 2026.

Plan a trip that leaves it out

The best parties in Thailand don't need anything in your pocket.

See our is Thailand safe guide for the rest of the safety rules, and our nightlife hosting page for a night where the door, the table and the car are sorted. Plan it with Tanner, and he sends back the plan for your group.