The drug-regulating law in Thailand involves the following three acts.
1. Narcotics Act B.E. 2522 (1979)
2. Psychotropic Substances Act B.E. 2518 (1975)
3. Drugs Act B.E. 2510 (1967)
Therapeutic drugs for human use are classified in pursuant to the Thai law into three categories, namely those considered narcotics, those considered psychotropic substances and those in neither of these two categories. This last category is regulated as drugs under the Drugs Act.
Regulation of the importation of drugs for personal use varies, depending on which act the drugs of interest belong to. Each act further specifies drug sub-categories, which are differently regulated.
Narcotics under the Narcotics Act and psychotropic substances under the Psychotropic Substances Act are classified into five and four schedules, respectively.
Schedule 2 narcotics under the Narcotics Act are permitted to be carried with patients into / out of Thailand in the quantity for 30-day use, provided that permission is granted by the Food and Drug Administration. On the contrary, the importation of schedule 1 and schedule 5 narcotics is forbidden even though they are carried with patients.
Psychotropic substances in schedules 2, 3 and 4 under the Psychotropic Substances Act are permitted to be carried with patients into / out of Thailand in the quantity for 30-day use in the presence of medical certificates.
The importation of schedule 1 substances is forbidden even though they are carried with patients.
Drugs that are not regulated as narcotics or psychotropic substances are legally permitted to be carried with patients into / out of Thailand in the quantity for 30-day use without medical certificates.