Interpretive Handbook
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Test 60040:
Methaqualone, Urine
Clinical Information 
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Methaqualone is a sedative hypnotic drug that is not available in the United States as a prescription drug. It has also been used illegally as a recreational drug, commonly known as quaaludes (particularly in the 1970s in North America).
The biologic half-life is 20 to 60 hours, and is detectable in urine for 4 to 6 days after use.
Useful For Suggests clinical disorders or settings where the test may be helpful
Detecting drug abuse involving methaqualone
Interpretation Provides information to assist in interpretation of the test results
The presence of methaqualone in urine at >100 ng/mL indicates use of this drug.
Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Negative
Positives are reported with a quantitative GC-MS result.
Cutoff concentrations:
IMMUNOASSAY SCREEN
<300 ng/mL
METHAQUALONE BY GC-MS
<100 ng/mL
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