Patient should abstain from taking any medications, over-the-counter drugs, and herbal remedies 72 hours prior to urine collection.
- During the collection period, refrigerate 24-hour urine and record the total volume.
- Mix urine and transfer 8.0 mL to a plastic aliquot tube. Label tube with two identifiers. Acceptable identifiers include patient’s name, date of birth, social security number, requisition number, and medical record number.
- Freeze - send this aliquot separately when multiple tests are ordered.