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.
Domestic Airlines Baggage Fees. The below chart includes most major domestic carriers. All fees listed below are for domestic flights only, including U.S. Virgin Islands and Puerto Rico. Fees for international flights will vary, though most carriers offer the first checked bag for free. For more information on other carriers, check the links below the chart. Note: Though most airlines do not charge for the first checked item for an international flight, please visit the airline directly for exact international baggage fees. Updated: January 8, 2016.