Quinazolin-4-one derivatives of methaqualone substituted at C-2 define a new class of noncompetitive antagonists at AMPA receptors.
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From historical drugs to present perils: UHPLC-QqQ-MS/MS determination of methaqualone and its designer analogs (NPS) with comprehensive fragmentation pathways study (QTOF).
Toxicol Mech Methods
November 2024
Department of Social Sciences and Infectious Diseases, Faculty of Medicine, Wroclaw University of Science and Technology, Wrocław, Poland.
Methaqualone, introduced in the 1960s as a sedative-hypnotic alternative to barbiturates, was withdrawn from the market due to its side effects and growing recreational use. Despite this, interest in methaqualone and its analogs remains high, raising concerns about potential abuse in the future. An ultra-high-performance liquid chromatography method coupled with triple quadrupole tandem mass spectrometry (UHPLC-QqQ-MS/MS) was developed to determine nine methaqualone-related compounds simultaneously.
View Article and Find Full Text PDFStructural insights into GABA receptor potentiation by Quaalude.
Nat Commun
June 2024
Department of Neurobiology, University of California San Diego, La Jolla, CA, USA.
Methaqualone, a quinazolinone marketed commercially as Quaalude, is a central nervous system depressant that was used clinically as a sedative-hypnotic, then became a notorious recreational drug in the 1960s-80s. Due to its high abuse potential, medical use of methaqualone was eventually prohibited, yet it persists as a globally abused substance. Methaqualone principally targets GABA receptors, which are the major inhibitory neurotransmitter-gated ion channels in the brain.
View Article and Find Full Text PDFReview of the experiences of users of methaqualone and methaqualone derivatives. An analysis of online forums.
Arch Med Sadowej Kryminol
January 2024
Department of Forensic Medicine, Wroclaw Medical University, Poland.
The aim of this review article was to collect and analyze the available information on methaqualone and its derivatives reported by users in dedicated online forums. Methaqualone is a sedative-hypnotic drug that has been widely used for medical purposes in the past, but is now illegal in most countries due to its high abuse potential. The review collected information on doses, routes of administration, desirable and side effects of intoxication and other relevant aspects of the abuse of these compounds.
View Article and Find Full Text PDFThe next addiction-causing drug class 4-quinazolinone derivatives: analyses of methaqualone analogs including recently discovered 2-methoxyqualone by different modes of mass spectrometry.
Forensic Toxicol
January 2023
Department of Legal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 413-3192, Japan.
Purpose: The information on analytical methods for 4-quinazolinone recreational drugs, such as methaqualone, etaqualone and 2-methoxyqualone, is almost scant. In this study, product ion spectra of gas chromatography-tandem mass spectrometry (GC-MS/MS) with different collision energies were presented for these drugs. Because 2-methoxyqualone is a new recreational drug discovered in dubious tablets very recently, much more detailed data obtained by different types of mass spectrometry instruments, and quantification data of 2-methoxyqualone in the tablet together with its validation were demonstrated.
View Article and Find Full Text PDFDARK Classics in Chemical Neuroscience: Methaqualone.
ACS Chem Neurosci
February 2023
Warren Center for Neuroscience Drug Discovery, Vanderbilt University, Nashville, Tennessee 37232, United States.
Commonly known as "Quaaludes," methaqualone () is a sedative-hypnotic medication, with effects resembling barbiturates and other downers, that exerts its effects through modulation of γ-aminobutyric acid type A receptors (GABAR). Following the discovery of the sedative and euphoric effects of methaqualone (), it was quickly adopted by pharmaceutical companies and promoted by clinicians around the world as a "safe" sleeping pill option, and for a period it was available over the counter. The popularity of methaqualone () soared worldwide, and many people began to use it recreationally for its sedative-hypnotic-like psychoactive effects.
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