Amitriptyline, Screen

Test ID: 

703502

CPT code:

80335

Synonyms:

Elavil®/Endep

Clinical Use:

Evaluate toxicity; monitor therapeutic levels

Additional Test Information:

Amitriptyline is a tricyclic antidepressant that blocks the reuptake of serotonin at nerve endings and possesses high anticholinergic activity and cardiovascular toxicity. The drug is extensively metabolized to many polar compounds, the chief of which is nortriptyline. It is also an antidepressant. Both drugs are prescribed for depression and a range of other disorders.

Specimen Type:

Serum or plasma

Requested Volume: 

1 mL

Minimum Volume: 

0.3 mL

Container Type: 

Red-top tube, lavender-top (EDTA) tube, or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.

Collection:

Transfer separated serum or plasma to a plastic transport tube. For therapeutic monitoring, collect specimen immediately prior to next dose unless specified otherwise.

Storage Instructions:

Room temperature

Stability Requirements:

Rejection Criteria

Gel-barrier tube