Description
Why It’s Done:
The test is commonly ordered to:
• Detect recent barbiturate use or abuse
• Monitor compliance in patients prescribed barbiturates
• Investigate causes of unexplained sedation, confusion, or overdose
• Support workplace drug testing or legal investigations
• Screen patients in emergency or psychiatric settings
Preparation:
• No special preparation or fasting is required.
• Provide a clean-catch midstream urine sample when requested.
• Inform your healthcare provider about any prescribed medications, over-the-counter drugs, or supplements, as some substances can interfere with test results.
• Avoid excessive fluid intake before the test to prevent urine dilution.


