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HelpTest Code BUTAS Butalbital, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum RedSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1.5 mL
Collection Instructions:
1. Draw blood immediately before next scheduled dose.
2. Centrifuge and aliquot serum into a plastic vial within 2 hours of collection.
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 |
Reference Values
Therapeutic concentration: <10 mcg/mL
Toxic concentration: ≥10 mcg/mL
Day(s) Performed
Thursday
CPT Code Information
80299
Clinical Information
Butalbital, a short-acting barbiturate with hypnotic properties, 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 of 0.8 L/kg, and about 26% of a dose is bound to plasma proteins. The half-life of butalbital is about 35 to 88 hours. Excretion occurs mainly in the urine.(1,2)
Report Available
3 to 9 daysReject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Method Name
Gas Chromatography-Mass Spectrometry (GC-MS)
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.