On-Site Urine Drug Testing FAQ's

On-site Screening Devices-Frequently Asked Questions

Q: What is the shelf life of the onsite screening devices?

A: The onsite screening devices have a shelf life of 24 months. The expiration date is indicated on each individual foil pouch and can be used up until that date.

Q: How many onsite test devices come in a box?

A: There are 25 onsite test devices in each box.

Q: What is included in my supplies?

A: Every onsite test device comes with a collection container. A confirmation box is also included with every order in the event of a positive to be confirmed by our laboratory.

Q: Do the results hold up in court?

A: The on-site device provides only a preliminary analytical test result. A more specific analytical method, preferably gas chromatography - mass spectrometry (GC-MS) or liquid chromatography - tandem mass spectrometry (LC-MS/MS), must be used to obtain a confirmed analytical result. Any result, which is contested or used punitively, and especially, if taken to court, must be confirmed. To confirm specimens, call Redwood Toxicology Laboratory at 877.444.0049.

Q: Do the screening devices need refrigeration?

A: No, as stated on the "Storage and Stability" section of the product insert, the test device should be stored at 2° to 30C° and will be effective until the expiration date.

Q: Are the onsite screening devices biohazardous?

A: No, the device itself is not biohazardous. Urine is not considered biohazardous unless it contains blood.

Q: Do you accept payment by credit card?

A: Yes. Redwood Toxicology Laboratory accepts: Visa, MasterCard or American Express.

Q: What are the screening cutoff levels?

A: To view cutoff levels for individual tests and target drugs select from these products:

Q: Can I photocopy the results for my files?

A: Yes, the Panel-Dip device may be photocopied upon completion of testing. This may be an important factor for some agencies when it is necessary to maintain chain of custody.

Q: Are there any cross-reactions?

A: Since screening methods, whether laboratory based or on-site, depend upon antibodies to react with specific drugs, reactions with unrelated drugs can also occur. For this reason, a more specific alternate method such as GC-MS or LC-MS/MS must be used in order to obtain a confirmed analytical result. Our laboratory can provide a list of substances that may possibly produce false positive screening results.