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.
However, on international flights, only Alaska Airlines, Sun Country Airlines and in some cases, American Airlines, charge a fee for the first bag. Lufthansa, which flies primarily to destinations in Europe, does not charge any baggage fees, allowing passengers to check up to three bags on international flights. Air Canada also does not charge for the first checked bag on flights between the U.S. and Canada.