Thailand
Country · Asia
Thailand permits most prescription medicines for personal use, but its cannabis rules are under active review after recent reforms — the legal status is shifting back toward medical-only control. Controlled medicines are regulated by the Thai FDA and require a prescription.
Traveler warnings
Cannabis regulations are under active review and changing — do not rely on 2022–2023 rules. Never carry cannabis across the border.
Legal status by substance category
8 categories documented for Thailand.
ADHD Stimulants (Adderall, Ritalin, Vyvanse)
Stimulants (ADHD Medications)
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Benzodiazepines (Xanax, Valium, Klonopin)
Benzodiazepines / Anxiolytics
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
CBD Products
CBD Products
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Restricted in Thailand. Keep within personal-use limits, carry full documentation, and verify current rules with the official authority before travel. CBD is regulated as a controlled/health product; verify current Thai FDA rules before travel.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Cannabis / Marijuana
Cannabis / Marijuana
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Restricted in Thailand. Keep within personal-use limits, carry full documentation, and verify current rules with the official authority before travel. Thailand's cannabis framework is under active review and moving back toward medical-only control; importing or exporting cannabis remains prohibited.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
General Prescription Medications
General Prescription Medications
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Opioids / Pain Medications (codeine, tramadol, oxycodone)
Opioids / Pain Medications
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Psychiatric Medications (antidepressants, antipsychotics)
Psychiatric Medications
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Testosterone / Hormone Therapy
Testosterone / Hormone Therapy
Limit: Personal medical supply only (typically up to a 30–90 day course); larger amounts may require an import permit.
Allowed in Thailand with a valid prescription. Carry documentation, keep medicines in original labelled packaging, and declare controlled medicines at customs.
Penalty: Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Prescription policy
Carry a personal supply of prescription medicine with the original prescription and a doctor's letter. Controlled (Category 2) medicines should be limited to a 30-day supply and declared; some require prior permission from the Thai FDA.
Controlled substances
Narcotics and psychotropics are controlled by the Narcotics Control Division. Cannabis was decriminalized in 2022 but is being re-regulated toward medical use only; recreational use and imports remain restricted. Opioids, stimulants and benzodiazepines require a prescription.
Customs & border guidance
Declare controlled medicines to Thai customs and carry documentation. Do not import cannabis or cannabis products — cross-border movement is prohibited even as domestic rules change.
Penalties
Drug trafficking and possession of hard drugs carry heavy penalties including long imprisonment. Misuse of cannabis outside the evolving medical framework can lead to fines or prosecution.
Live Alerts
Thailand: Cannabis regulations under active review — do not import or export
AdvisoryThailand decriminalized cannabis in 2022 but is re-regulating it toward medical-only control. The legal status is shifting, and rules that applied in 2022–2023 may no longer hold. Never carry cannabis across the Thai border in either direction — importing or exporting cannabis remains prohibited even as domestic rules change.
Thailand: Controlled medicines need documentation and may require Thai FDA permission
Documentation RequiredControlled medicines such as ADHD stimulants, strong opioids and some benzodiazepines require a prescription in Thailand and should be limited to a 30-day supply. Some require prior permission from the Thai FDA. Carry the original prescription, a doctor's letter, and any required permission, and declare controlled medicines at customs.
Thailand: Cannabis is being re-regulated — do not fly in or out with it
AdvisoryThailand decriminalized cannabis in 2022 but is re-regulating it toward medical-only control, and the legal status is shifting. Regardless of domestic rules, importing or exporting cannabis through Thai airports remains illegal. Never carry cannabis across the Thai border in either direction.
Documentation required
Original prescription, doctor's letter, Thai FDA permission for restricted medicines where required, medicines in original packaging.
Official source
Thai FDA (Narcotics Control Division), Ministry of Public HealthLast reviewed: August 8, 2025
For informational purposes only. This profile is not legal or medical advice. Laws change frequently; always verify with the official government, embassy, customs, or health authority before you travel.