What are barbiturates tranquilizers and methaqualone?

Barbiturates are a class of drugs that act as central nervous system depressants, historically used for anxiety, insomnia, and seizure disorders but now largely replaced by safer alternatives due to their high potential for addiction and overdose. Tranquilizers, often referring to benzodiazepines, are medications designed to reduce anxiety and promote relaxation, also carrying risks of dependence. Methaqualone, originally developed as a sedative and tranquilizer, became popular as a recreational drug in the 1970s but was eventually banned in many countries due to its addictive properties and potential for overdose. All these substances affect brain chemistry and can lead to serious health risks if misused.