Quaaludes Are No Longer Used for Any Legitimate Medical Purpose
Methaqualone (Quaalude) has been completely discontinued from medical practice and is classified as a Schedule I controlled substance in the United States, meaning it has no accepted medical use and high abuse potential. 1
Historical Context and Current Status
Methaqualone was originally marketed as a "safe" sedative-hypnotic medication in the 1950s-1960s, promoted as an alternative to barbiturates for treating insomnia 2. However, its widespread recreational abuse, high addiction potential, and dangerous overdose profile led to its complete withdrawal from the pharmaceutical market in the mid-1980s 2, 3.
Why It Was Discontinued
- High abuse and dependence potential: The drug became notorious for recreational use due to its euphoric and sedative effects
- Dangerous overdose profile: Methaqualone overdose causes neurotoxicity characterized by somnolence, hyperreflexia, muscular hyperactivity, and respiratory depression 4
- No therapeutic advantage: Other safer sedative-hypnotics (benzodiazepines, non-benzodiazepine sleep aids) provide equivalent or superior efficacy with better safety profiles
Current Medical Alternatives
For conditions that methaqualone once treated (insomnia, anxiety), modern medicine uses:
- Benzodiazepines (though with caution due to dependence risk)
- Non-benzodiazepine hypnotics (zolpidem, eszopiclone)
- Melatonin receptor agonists
- Sedating antidepressants (trazodone, mirtazapine)
Contemporary Concerns
Methaqualone analogs (such as SL-164) have emerged in the designer drug market, sold online as "research chemicals" 4, 5. These analogs produce similar dangerous effects including:
- Prolonged agitated delirium
- Myoclonus and hyperreflexia
- Respiratory depression
- Methemoglobinemia (when combined with other substances) 4
Clinical Pitfall
If you encounter a patient with unexplained agitated delirium, hyperreflexia, and myoclonus—particularly in someone with known substance use—consider methaqualone analog ingestion. Treatment is supportive with benzodiazepines and observation until symptoms resolve (typically 48-72 hours) 4, 5.
The bottom line: Quaaludes serve no legitimate medical purpose today and exist only as illegal substances of abuse.