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.
Restricted items. Learn about rules for knives, dangerous goods, and other carry-on or checked baggage items concerned by many passengers. For passengers flying on a codeshare flight. When boarding a codeshare flight serviced by another airline, the free baggage allowance indicated on your ticket will be valid in principle.