Collect blood in an 8-10 mL plain red top tube.
An 8-10 mL green top tube is also acceptable for this assay, but not preferred.
Separate serum from cells immediately by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Use a separate tube for each test ordered. Allow room for expansion of sample.
Freeze at -70°C if possible, but at minimum -20°C.
Preferred volume: 2 mL of serum (or plasma).
Minimum volume: 0.5 mL serum or plasma
Severe hemolysis, thawed samples for greater than 24 hours
Fully complete PK requisition, including drug dose amount, frequency, method, and date and time of last dose prior to draw.
Ship samples via overnight delivery on >3 lbs of dry ice.
Up to 24 hours at room temperature. Thereafter, freeze at -70°C if possible, but at minimum -20°C.
Ship samples to be received Monday through Friday. Do not ship on Friday or Saturday. For shipping and detailed collection instructions, click here.
Within 7 days
HPLC (Sildenafil, Level);Viagra (Sildenafil, Level);Revatio (Sildenafil, Level);SILLH