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.
Southwest is the only major U.S. airline to offer bags fly freeÂ® to everyone (first and second checked pieces of luggage, size and weight limits apply, some airlines may allow free checked bags on select routes or for qualified circumstances), and there are no change fees, though fare differences might apply.