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.
Check which part of your baggage is free and is included in your contracted baggage allowance . The Iberia contact points at your terminal are: Boarding gate, check-in counter and Iberia Information Points. Business Class and Business Plus passengers also have the VIP lounges.