Quaalude is a brand name for the sedative-hypnotic drug methaqualone. It has since been discontinued in many countries due to its addictive nature and harmful side effects. However, there are still synonyms commonly used to refer to the drug, such as Quacks, Ludes, and Sopor. Other street names include Mandrax, Mandies, and Lemmon 714. Despite being banned in many countries, it continues to be used illegally and can be obtained through illicit means. It is important to note that the use of such drugs is dangerous and can lead to severe health consequences. Hence, it is crucial to seek medical help if one is addicted to such drugs or has a drug-seeking behavior.