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Primidone

Source Blood
Mnemonic PRIM
Specimen Requirements

1 x 3 mL light green (mint) top PST tube preferred.  Gold top SST tube also acceptable.

0.2 mL plasma or serum.

Collect specimen 0-60 minutes prior to next dose.

Minimum Whole Blood Volumes for Micro-Collections

Specimen Handling Extra-regional:
Centrifuge, pour off, and freeze serum prior to transport.
Additional Information

Record time of last dose on requisition.

Phenobarbital, a metabolite of Primidone, is tested with all Primidone requests.

For additional information, see Half-life and Time to Steady State.

Primidone results between 11 and 92 umol/L are reported. Results above 92 are reported as >92 umol/L and results below 11 are reported as <11 umol/L.  

Testing Location Chemistry-ACH
Testing Frequency

Twice per week

Alternate Name(s) Mysoline
Reference Interval

Therapeutic range: 23 - 55 umol/L

Click here for critical values.