|Downtime form:||A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery|
|Red top tube 5 mL (Clot Activator)|
Absolute Minimum: 0.5 mL serum
For many drugs, a 2-hour peak sample will be collected. You can consider a second blood draw 6 hours post dose to rule out late absorption, or to determine the serum half-life for certain drugs that have short half-lives, such isoniazid and rifampin.
For most HIV drugs, the preferred time of draw is a pre-dose trough.
Please print, complete, and submit the Pharmacokinetics Diagnostics Requisition from the National Jewish Health Laboratory with the specimen.