Reviewed by the ThaiCannaMed medical team | Last updated: August 2026
Cannabis Use in Thailand is regulated through a medical framework, but there is no simple list of five conditions that guarantees a cannabis prescription. Patients may discuss chronic pain, insomnia, migraine, appetite loss and other symptoms with an authorised practitioner, but every case must be assessed individually.
The legal and medical distinction matters. Thailand’s Division of Medical Cannabis states that cannabis flower must be prescribed according to medical necessity and the professional guidelines applicable to the practitioner. A prescription may cover no more than a 30-day treatment period.
The clinical evidence also differs considerably between conditions. The US National Center for Complementary and Integrative Health reports that some cannabis or cannabinoid products have shown potential for particular symptoms, but evidence is limited for many commonly discussed uses. Benefits, risks and results depend on the patient, product, cannabinoid content and method of administration.
Therefore, responsible Cannabis Use in Thailand begins with an honest medical assessment, not a promise of quick approval.
What Does Cannabis Use in Thailand Require in 2026?
Thailand introduced tighter controls over cannabis flower in June 2025. Under the current medical system, patients require a valid controlled-herb prescription, commonly called PT33, before purchasing cannabis flower.
The practitioner must assess the patient and decide:
- Whether cannabis is medically appropriate
- Whether possible benefits justify the risks
- What quantity should be authorised
- What directions should be recorded
- How long the treatment period should last
The dispensary has a different role. It verifies the prescription, supplies no more than the authorised amount and records the sale. A dispensary employee cannot make the prescribing decision.
ThaiCannaMed’s guide to PT33 prescriptions in Thailand explains the document, the information it contains and how patients can recognise a genuine prescription.
Are There Officially Approved Cannabis Conditions in Thailand?
It is misleading to say that five conditions are automatically “approved” for Cannabis Use in Thailand.
Patients may commonly raise certain symptoms during consultations, but mentioning one does not guarantee that a PT33 will be issued. The practitioner must consider the severity and duration of the symptoms, previous treatment, medical history, current medication and potential contraindications.
Two patients describing the same condition may receive different clinical decisions. Cannabis may be considered for one patient but rejected for another because of age, medication interactions, pregnancy, breastfeeding, psychiatric history, cardiovascular risk or previous adverse reactions.
The following five sections describe symptoms that patients may discuss. They are not a guaranteed eligibility checklist.
1. Chronic Pain
Chronic pain is one of the most frequently discussed reasons for medical cannabis consultations. It can include neuropathic pain, persistent back pain, arthritis-related discomfort, post-injury pain or pain associated with another long-term condition.
However, the evidence does not support claiming that cannabis always relieves chronic pain or that it is automatically safer than conventional pain medication.
The Agency for Healthcare Research and Quality’s living systematic review found that certain oral cannabinoid products may produce small short-term improvements in pain, particularly neuropathic pain. The same review identified increased risks of dizziness, sedation and nausea. It also found insufficient evidence for several other products and for many longer-term outcomes.
A practitioner considering Cannabis Use in Thailand for chronic pain may ask about:
- The location and type of pain
- How long it has been present
- Previous diagnoses and investigations
- Medication currently being used
- The effect on movement, sleep and daily life
- Previous reactions to cannabis
- Risks associated with dizziness or impairment
Cannabis should not be presented as a replacement for opioids, physiotherapy, surgery or other treatments without an appropriate medical evaluation.
2. Insomnia and Persistent Sleep Problems
Patients may discuss difficulty falling asleep, waking repeatedly or poor-quality sleep during a consultation. However, insomnia can have many causes, including stress, pain, medication, alcohol use, sleep apnoea, shift work and mental health conditions.
Research into cannabis and sleep remains mixed. The NCCIH review of cannabis and cannabinoids notes that some studies involving patients with other medical conditions reported improved sleep. It remains uncertain whether cannabis directly improved sleep or whether patients slept better because another symptom, such as pain, had changed.
Cannabis can also cause daytime drowsiness, impaired concentration or tolerance with repeated use. In some patients, stopping regular use can temporarily disturb sleep.
For that reason, Cannabis Use in Thailand for insomnia is not automatically quick or straightforward. A practitioner may need to understand:
- How long the sleep problem has lasted
- Typical sleeping and waking times
- Caffeine and alcohol consumption
- Existing medication
- Symptoms of anxiety or depression
- Possible sleep apnoea
- Whether pain or another condition disrupts sleep
Patients should describe the complete problem rather than treating insomnia as a password that guarantees approval.
3. Anxiety, Stress and Related Symptoms
Anxiety is another commonly discussed issue, but cannabis can affect anxiety in opposite ways.
Some patients report feeling calmer. Others experience racing thoughts, panic, paranoia, increased heart rate or worsening anxiety, particularly after using products containing higher concentrations of THC.
The NCCIH states that only a small amount of evidence suggests cannabis or cannabinoids may reduce anxiety in some circumstances. The available research is not strong enough to claim that cannabis reliably treats anxiety disorders, depression or post-traumatic stress disorder.
A practitioner assessing Cannabis Use in Thailand for anxiety-related symptoms may consider:
- The nature and severity of the symptoms
- Whether the patient has panic attacks
- Existing psychiatric diagnoses
- Current antidepressants or sedatives
- Previous cannabis experiences
- Personal or family history of psychosis
- Alcohol or substance use
- Risk of dependence or worsening symptoms
Patients experiencing severe anxiety, suicidal thoughts, psychosis or an acute mental health crisis require appropriate professional care. Cannabis should not be promoted as a substitute for emergency or specialist treatment.
For a more detailed discussion, read Cannabis for Anxiety in Thailand.
4. Migraine and Neurological Symptoms
Migraine can cause severe headache, nausea, visual disturbances and sensitivity to light or sound. Some patients report using cannabis to manage pain or nausea during attacks, but current evidence is not strong enough to promise reduced frequency or intensity.
Neurological symptoms also require careful investigation because headaches, weakness, seizures and sensory changes can sometimes indicate conditions needing urgent or specialist treatment.
Patients considering Cannabis Use in Thailand should tell the practitioner:
- How frequently migraines occur
- How long attacks last
- Whether there is an aura
- What medication has been tried
- Whether symptoms have recently changed
- Whether there are seizures or neurological deficits
- Whether cannabis has previously worsened dizziness or nausea
A sudden severe headache, weakness on one side, loss of consciousness, confusion or new neurological symptoms should be treated as a medical emergency rather than managed through a routine cannabis consultation.
5. Appetite Loss, Nausea and Digestive Problems
Cannabinoid medicines have been studied most clearly for nausea and vomiting associated with cancer chemotherapy. That evidence does not mean cannabis is proven to treat every form of nausea, appetite loss or digestive discomfort.
The NCCIH reports that the cannabinoid medicines dronabinol and nabilone performed better than placebo for chemotherapy-related nausea in older studies, although patients also experienced side effects including dizziness and sleepiness.
General claims about cannabis treating irritable bowel syndrome, “balancing the gut” or gently restoring appetite go beyond what current evidence can support.
A practitioner may ask about:
- How long the nausea or appetite loss has lasted
- Unintentional weight loss
- Abdominal pain or bleeding
- Existing digestive conditions
- Cancer treatment
- Eating disorders
- Current medication
- Pregnancy
- Alcohol or other substance use
Persistent appetite loss, vomiting, unexplained weight loss or blood in the digestive tract may require investigation before cannabis is considered.
Conditions Do Not Guarantee a Prescription
The purpose of a consultation is to determine suitability, not to confirm a decision the patient or retailer has already made.
An authorised practitioner may decline to prescribe cannabis if:
- The evidence does not support its use in that case
- The risks outweigh the likely benefit
- Symptoms require further investigation
- Cannabis may interact with current medication
- The patient has experienced serious adverse effects before
- The patient is under 20
- The patient is pregnant or breastfeeding
- There are significant psychiatric, cardiovascular or dependency concerns
- The information provided is incomplete or inconsistent
Approval should never be promised by a dispensary, website or member of retail staff. Thai authorities have acted against allegedly false PT33 documentation, including pre-signed forms completed without a proper assessment.
Patients can read How to Find Medical Cannabis Doctors in Thailand to understand who may issue a prescription and what to check before a consultation.
How to Arrange Legal Cannabis Use in Thailand
Patients have two main ways to request an assessment through ThaiCannaMed.
Complete an Online Consultation
Patients can begin through the ThaiCannaMed Patients Hub.
The usual process is:
- Complete the secure medical intake.
- Provide a Thai ID card or valid passport.
- Join a private consultation with a licensed Thai Traditional Medicine practitioner.
- Discuss symptoms, medical history and medication.
- Receive a digital PT33 if treatment is approved.
- Present the prescription to a registered dispensary.
- Purchase only the authorised quantity.
The complete process generally takes approximately 5–15 minutes from start to finish. More complex cases may require additional discussion or referral.
The current ThaiCannaMed prices are:
- THB 600 for a first consultation
- THB 600 for a renewal consultation
Payment covers the assessment and does not guarantee approval.
Visit a Participating Green Network Dispensary
Patients who prefer assistance can use the live Green Network directory to find participating dispensaries currently listed in Bangkok and Phuket.
At the dispensary, the patient scans the ThaiCannaMed QR code, completes the medical intake and speaks privately with the practitioner by video. If approved, the digital PT33 can be issued and the authorised purchase completed at that location.
The dispensary facilitates access to the consultation but does not issue the prescription itself. Individual store prices or bundle arrangements may differ, so patients should confirm the terms before beginning.
What Does a PT33 Allow?
A PT33 allows the named patient to purchase the cannabis flower specifically authorised for personal medical treatment.
The prescription may cover no more than 30 days. Current DTAM public guidance states that cannabis flower should not exceed 30 grams per month. That is a maximum ceiling, not an automatic allowance.
A PT33 does not allow a patient to:
- Purchase for somebody else
- Share or resell cannabis
- Exceed the authorised quantity
- Continue purchasing after expiry
- Smoke in public
- Drive while impaired
- Carry cannabis across an international border
Patients should keep the digital prescription, original packaging and purchase receipt accessible.
For a complete explanation of the purchasing process, see How to Get Legal Cannabis in Thailand.
Possible Side Effects and Safety Considerations
Cannabis can produce unwanted effects even when prescribed.
Possible effects include:
- Dizziness
- Drowsiness
- Reduced concentration
- Impaired coordination
- Anxiety or panic
- Increased heart rate
- Dry mouth
- Nausea
- Changes in perception
- Dependency with repeated use
Patients should avoid driving, riding a motorbike or operating machinery while impaired. Combining cannabis with alcohol, sedatives or other medication can increase risk.
Cannabis should be stored securely and away from children. Anyone experiencing severe anxiety, chest pain, fainting, confusion, psychosis or another serious reaction should seek medical assistance.
Frequently Asked Questions
Are five conditions automatically approved for Cannabis Use in Thailand?
No. There is no guarantee that mentioning one of five conditions will result in a prescription. Every patient must be assessed individually by an authorised practitioner.
Can chronic pain qualify for a PT33?
Chronic pain may be discussed during an assessment, but approval depends on the type of pain, previous treatment, medical history, medication and individual risk factors.
Is cannabis proven to cure insomnia or anxiety?
No. Evidence remains limited and varies by condition and product. Cannabis may also worsen anxiety or produce daytime impairment in some patients.
How long does a PT33 last?
A PT33 may cover a treatment period of no more than 30 days. The practitioner records the authorised period and quantity.
Can tourists request an assessment?
Yes. Tourists can request a consultation using a valid passport. A foreign cannabis card or overseas prescription does not replace a Thai PT33.
Is the online consultation available around the clock?
No. ThaiCannaMed should not be described as offering 24-hour doctor access. Consultations are generally available daily from 10:00 AM until 2:00 AM Thailand time.
Does paying THB 600 guarantee a prescription?
No. The THB 600 fee covers the first medical consultation. The practitioner may decline to issue a prescription if cannabis is not appropriate.
A Medical Decision, Not an Automatic Approval List
Safe and lawful Cannabis Use in Thailand depends on a genuine assessment, realistic expectations and accurate documentation. Chronic pain, insomnia, anxiety, migraine and appetite loss may all be discussed, but none guarantees approval or a particular medical result.
The patient’s responsibility is to provide accurate information and follow the prescription. The practitioner’s responsibility is to make an independent medical decision. The dispensary’s responsibility is to verify the PT33, supply only the authorised amount and record the sale. Keeping those roles separate is what turns an uncertain retail purchase into a properly documented medical process.