GHB (gamma-hydroxybutyrate) is produced naturally in the human body in very small amounts. When taken as a recreational drug, and especially when taken in combination with alcohol or other drugs, GHB can be extremely dangerous. GHB is a central nervous system depressant.
International flights always allow carry-on luggage, but each airline has its own restrictions as to quantity, size and weight. Some international carry-on policies restrict bag weights to 11 lbs. or less, while domestic flights rarely have a weight limit.
Baggage carried in excess of the free baggage allowance is charged as follows, irrespective of the class paid for and used by the passenger. Excess Baggage Charge rate, applicable to a checked portion of travel on purely THAI Smile Domestic and International sectors, are in Weight Concept on a fixed rate listed below.