Drug Screening
What to Know Before a Opiate Screen and Confirmation Blood Test: Prep
- Urine sample
- Drug Screening
- Prep checklist included
At a glance
Opiate Screen and Confirmation Blood Test: prep snapshot
- Sample type
- Urine sample
- Fasting
- Fasting is generally not required for this urine test, but some collection sites may have their…
- Best collection time
- The sample can usually be collected at any time of day that fits your schedule.
- Typical turnaround
- Varies by collection lab
- Category
- Drug Screening
This page explains how to prepare for a Opiate Screen and Confirmation, what the test measures, and what to confirm with the collection lab. The Opiate Screen and Confirmation test checks urine for opiate substances, with a follow-up confirmation step if the initial screen is positive.
What the Opiate Screen and Confirmation measures
The screen looks for evidence of opiate-class substances in urine, while the confirmation step verifies any reactive screen with a more specific technique. Together they help distinguish a true positive from a possible false positive. The test does not measure how much was used or when it was used.
- Opiate screen
- Confirmation testing
- Specimen validity
Preparation checklist for the Opiate Screen and Confirmation
Most people do not need special preparation for this test. Confirm any timing or fasting guidance with the collection site before your appointment.
- Confirm with the collection lab whether any fasting or timing instructions apply to your appointment.
- Drink normal amounts of water beforehand unless the lab tells you otherwise, since a sample must be produced at the visit.
- Avoid changing your usual medications or supplements on your own; tell the lab about anything you take.
- Bring a current list of prescription and over-the-counter medicines, including dosages.
- Arrive with enough time to complete paperwork and provide the sample.
Fasting, timing, sample type, and what to bring
Fasting
Fasting is generally not required for this urine test, but some collection sites may have their own instructions. Confirm with your lab.
Best time to collect
The sample can usually be collected at any time of day that fits your schedule. Follow whatever appointment window the collection site gives you.
Sample type
Urine sample. The collector will explain the process before starting.
What to bring
- Your order confirmation email, in case the collection site asks to see it
- Your printed lab order or requisition form — the ordering physician prepares it for you after you order, and you print it (or fax it from your account) before visiting
- A written list of the medications and supplements you currently take
- A short-sleeved or loose-sleeved shirt for an easy blood draw
- Water to drink before the draw and a light snack for afterward, if your test requires fasting
- A government-issued photo ID (most collection sites verify identity at check-in)
You do not need an insurance card or a payment method at the collection site: the lab does not bill insurance, and you pay at order time, so there is no copay or deductible. The lab also provides the physician's requisition, so you do not need a separate doctor's referral.
Order process and what-to-bring details reflect the lab's published instructions, paraphrased in our own words. Confirm final requirements with the collection lab that will perform your draw.
What the collection involves
You provide a urine sample in a private collection area at the lab, following the site's instructions for the sample. The specimen is then sent to the laboratory for screening and, if needed, confirmation testing.
Details worth confirming with the collection lab before your visit:
- Does this test require any fasting or timing restrictions?
- What identification and paperwork should I bring to the appointment?
- How and when will my results be released?
Why a clinician may order this test
A clinician may order this test as part of routine drug screening, monitoring, or evaluation in certain care settings. It can also be used when there is a need to check for opiate-class substances for medical or legal purposes.
What results mean
Reference ranges and reporting formats vary by laboratory, so results should be interpreted using the range provided with your report. A reactive screen is not a diagnosis on its own and is usually followed by confirmation testing.
General test information is compiled from publicly available reference material, including MedlinePlus (medlineplus.gov) and the Centers for Disease Control and Prevention (cdc.gov), and is reviewed for clarity. Preparation and what-to-bring details reflect the lab's published instructions, paraphrased into our own words. Preparation instructions, timing, and pricing vary by collection lab — always confirm them with the lab that will perform your draw.
Common questions
Frequently asked questions
Do I need to fast for this test?
Fasting is usually not required, but collection sites can have their own instructions. Check with the lab before your visit.
How long do results take?
Turnaround is typically one to three business days, though it can vary by laboratory and any confirmation step.
What happens if the screen is positive?
A reactive screen is generally followed by a confirmation test to verify the result before it is reported as final.
Can my medications affect the result?
Some medicines can influence screening results, so tell the lab and your clinician about everything you take.