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Test ID BUTAS Butalbital, Serum

Useful For

Monitoring butalbital therapy

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)

Reporting Name

Butalbital, S

Specimen Type

Serum Red

Container/Tube: Red top

Specimen Volume: 1.5 mL

Collection Instructions: Spin down within 2 hours of draw.

Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Clinical Information

Butalbital is a short-acting barbiturate with hypnotic properties that is used in combination with other drugs such as acetaminophen, salicylate, caffeine, and codeine.(1)

 

Butalbital is administered orally. The duration of its hypnotic effect is about 3 to 4 hours. The drug distributes throughout the body, with a volume of distribution (Vd) of 0.8 L/kg, and about 26% of a dose is bound to plasma proteins. Butalbital's half-life is about 35 to 88 hours. Excretion occurs mainly in the urine.(1,2)

Reference Values

<10 mcg/mL

Cautions

No significant cautionary statements.

Day(s) Performed

Wednesday; 8 a.m.

Report Available

2 days

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

80345

G0480 (if appropriate)

NY State Approved

Yes