Monitor therapeutic drug level.
10 - 30 ng/mL
5 - 10 days
Collect specimen in a red top, lavender top (EDTA), or green top (heparin) tube; do not use SST tube. Centrifuge, aliquot serum or plasma into a plastic vial and refrigerate.
Optimal sampling time after dosage is 6 hours. Optimal resampling time after change in dosage is 48-96 hours. Test sent to Mayo Medical Laboratories; performed by NMS Labs.